EMRFD Message Archive
Thread Start Date Initiator Messages Subject 15525 2019-10-15 23:01:27 ka7exm 2 Transitioning... 15521 2019-10-15 19:46:21 nothdurftm 5 Yahoo Groups going away 15517 2019-10-11 10:08:26 w7zoi 4 W4ZCB 15490 2019-10-02 02:31:00 Ashhar Farhan 27 teflon toroids 15460 2019-09-12 16:43:54 jgnoci@gmail.com 30 Just to introduce Myself and some of the radios I built. 15459 2019-09-10 13:46:28 Alberto I2PHD 1 BFR99 Spice data 15453 2019-09-09 10:29:57 Dana Myers 3 Class E amplifiers - interesting bit of history (a little OT) 15435 2019-09-05 11:29:40 zmetzing 1 Transistor linearity 15434 2019-09-05 11:17:14 Rob 2 Re: CDROM w/ PDFs (DC Rcvr experiments) neat sockets are NIXIE TUBE 15418 2019-09-04 17:18:11 mhadley157@gmail.... 6 Bandpass filters swr 15388 2019-08-30 00:08:40 Ken Chase 59 Supply decoupling resistor 15378 2019-08-24 09:21:20 peter_dl8ov 5 Free (RF) Energy ?? 15373 2019-08-23 13:23:40 zmetzing 5 Silicon Carbide MOSFETs for PAs? 15371 2019-08-14 11:54:04 Leinweber, Glen 3 crystal oscillator tempco 15360 2019-08-10 11:40:48 David Feldman 11 Audio stage in "A Minimalist Direct Conversion Receiver" - design/mo 15343 2019-06-09 21:45:58 Ashhar Farhan 2 GaN amplifier, anyone? 15332 2019-06-07 17:31:39 Vern VanZ 15 Crystal, crystal...on the wall... 15289 2019-05-26 15:54:52 Alberto I2PHD 37 Please help me to save some of my hairs... 15285 2019-05-24 14:23:10 mhadley157@gmail.... 3 Compensating for xtal filter loss 15284 2019-05-18 02:58:55 Sandeep Lohia 1 BLT 15277 2019-05-11 03:49:59 peter_dl8ov 7 Multiple Op Amps on A Single Supply 15273 2019-05-10 10:13:00 mvtgcmotzj4yrql42... 4 Siglent or Rigol spectrum analyzer 15271 2019-05-10 09:55:55 mvtgcmotzj4yrql42... 2 What is the gain of this amplifier? 15264 2019-04-13 09:43:02 Mike Hadley 13 HyCas 15259 2019-03-17 02:31:46 Ashhar Farhan 8 Low noise integrated VCOs 15257 2019-03-14 21:12:57 Lauri Mayberry 1 Re: Digest Number 3091 15250 2019-03-11 11:19:01 byjimeny 6 George Dobbs, G3RJV (SK) 15248 2019-03-11 00:41:54 peepholenz 2 Compendium of RF Calculators 15239 2019-02-22 07:29:12 Andrea Baldoni 4 OT: someone know how to contact AA1TJ Michael Rainey? 15236 2019-02-14 08:34:39 zx97lite 2 For Sale Kanga US 40 Meter Universal QRP Transmitter Kitlet 15233 2019-02-01 23:28:12 Dana Myers 3 Observations about low-pass filters on CMOS-gate power amplifiers 15232 2019-02-01 09:36:32 g4jxx 1 Low bands SSB tx/rx for sale 15230 2019-01-29 05:01:07 zx97lite 2 Kanga US MicroT2 SSB Transmitter 4 Sale 15225 2019-01-23 04:32:13 zx97lite 2 Assembled IQ Pro High Perfomance Quadrature DDS VFO 4 Sale 15223 2019-01-19 11:37:16 zx97lite 2 Complete Set Assembled R2 Pro Boards 4 Sale 15218 2019-01-13 10:42:10 wchulley 4 identifying a mystery part... 15213 2019-01-10 17:08:30 peepholenz 9 NDK Osc 15208 2018-12-16 04:26:09 Ashhar Farhan 1 rick campbell is now IEEE fellow 15205 2018-12-14 10:26:16 Scott McDonald 4 Couple of mixer questions 15193 2018-12-03 10:00:56 Mike Hadley 12 H mode mixer 15187 2018-11-20 00:00:22 Dana Myers 4 LTC AN47: classic 15182 2018-11-17 11:48:19 richj_focus 5 Tek 465B Scope for sale 15180 2018-11-15 14:31:46 Will Kimber 4 Si5351 crystal 15170 2018-10-28 03:08:34 peter_dl8ov 4 R2 Receiver Gain Distribution 15160 2018-10-25 12:07:15 peter_dl8ov 2 Another Homebrew Blogger 15152 2018-10-22 15:25:11 Rod 22 inuductor wisdom needed: selection vs srf 15133 2018-10-15 19:20:38 lawrence_joy 6 A Short Course On Assigning Reference Designations 15124 2018-10-15 09:02:41 g4jxx 26 True S meter 15119 2018-10-08 17:26:04 Rod 5 need help locating I &Q phase trim article 15094 2018-09-26 09:58:02 Ken Chase 17 LO square wave or sine wave 15092 2018-09-25 04:32:06 Andrea Baldoni 9 IF stages - tube vs. solid state 15086 2018-09-23 15:45:42 Dana Myers 7 IEEE_Spectrum:_With_the_=e2=80=9cDead_Bug=e2=80=9d_Method=2c_Hobbyis 15064 2018-09-08 23:27:12 Dana Myers 2 3x CA3019 diode arrays available 15060 2018-09-08 16:43:51 Tayloe, Dan (Noki... 21 Low leakage NPN? 15053 2018-09-08 09:21:05 peter_dl8ov 5 Two Tone RF Amplifier Measurements 15048 2018-09-06 00:09:47 Ashhar Farhan 1 A New Antenna uses lasers 15037 2018-09-05 12:04:08 kb1gmx 19 Si5351 crosstalk between outputs 15027 2018-08-27 09:42:29 g4jxx 10 Hycas IF amp 15025 2018-08-25 11:51:04 peter_dl8ov 3 RF Decoupling of Connections 15021 2018-08-23 12:19:27 lmarion 2 Free NORCAL Key kit 15020 2018-08-23 12:18:18 lmarion 1 Fw: Free Tick board and chip 15017 2018-08-18 12:17:18 Nick Kennedy 3 70 W Chinese MOSFET linear amp kit 15011 2018-08-16 13:08:21 lmarion 5 Dans Small Parts 15001 2018-08-14 06:58:07 Ravi Miranda 4 TIA Amplifier replacement transistors 14989 2018-08-12 03:10:16 peter_dl8ov 13 Regarding Crystal Filters 14983 2018-08-08 08:35:52 Michael Hadley 13 Dishal filter calculator 14982 2018-08-04 11:25:59 Jim Strohm 1 3-D printers and missing radio parts 14971 2018-08-02 12:19:49 Scott McDonald 11 Sig Gen Woes 14960 2018-07-29 10:15:27 gollum@f-m.fm 4 Unbuilt r2PRO (40M) for sale 14951 2018-07-27 20:08:43 rcbuckiii 16 2 Meter High Pass Filter 14930 2018-07-23 16:46:58 vk3hn 21 A 2N5109 for today 14929 2018-07-20 12:31:51 arfghans 1 Cheap PCBs with great results 14915 2018-07-17 18:52:25 ka7exm 14 Happy Summertime EMRFD 14908 2018-07-03 09:24:14 nothdurftm 5 Siglent vs Rigol 14906 2018-07-03 04:10:34 Andrea Baldoni 1 Applying varactor tuning to a Vackar - some experiments 14904 2018-07-01 13:00:01 Andrea Baldoni 3 Applying varactor tuning to a Vackar 14899 2018-07-01 05:40:07 jwolczanski 8 Speaking of square waves 14891 2018-06-26 15:25:17 Ravi Miranda 3 Question re SDR schematic 14889 2018-06-26 07:23:36 richj_focus 7 Sine to Squar wave 14884 2018-06-10 21:59:33 Chuck Hutton 5 Amplification of ferrite loop array 14877 2018-06-06 11:54:52 zf2scka9p 1 G4JXX HYCAS KIT 14874 2018-06-05 07:23:13 nm0s_qrp 1 MSC-80270 Data Sheet? 14865 2018-06-03 10:46:05 Andrea Baldoni 17 CD JFET Hartley - resistor question 14864 2018-06-02 08:54:52 Ashhar Farhan 1 Han's article on his phasing trx 14859 2018-05-30 23:23:07 rcbuckiii 3 Possible SMT Replacement for 2N5109 14828 2018-05-21 19:25:10 richj_focus 31 mixer if port termination 14827 2018-05-21 11:57:13 w7zoi 1 HyCas IF Amplifier Kit 14819 2018-05-18 11:53:04 Ashhar Farhan 2 Homebrewing an IC (seriously) 14815 2018-05-17 17:02:05 gabichris2002 1 QRP El Lagunero 14813 2018-05-17 14:33:05 w7zoi 1 Been away, but back... 14809 2018-05-17 11:16:07 w7zoi 1 I've been away, but back now.... 14807 2018-05-14 21:46:43 bwbangerter 6 PC board for Hayward-Kopski TIA. 14802 2018-05-14 21:20:05 gabichris2002 1 QRP "El Lagunero" 14799 2018-05-14 21:19:46 gabichris2002 1 Qrp "El Lagunero" 14793 2018-05-14 21:19:08 gabichris2002 2 Bidirectional amplifiers 14788 2018-05-14 21:18:18 zf2scka9p 1 Final Tracks in the sand for the next guy/gal on FAR Circuits' HyCas 14783 2018-05-14 17:58:38 jmlcs2000 5 Files are back 14772 2018-05-09 05:38:41 Alan Melia 5 re where did all the files go? 14762 2018-05-08 09:01:20 kb1gmx 7 Where did the files go??? 14758 2018-05-07 18:42:49 rcbuckiii 9 Feedback Amplifier Equations 14729 2018-05-03 08:02:46 drmail377 9 Part-90 or Part-97 Spurious Compliance? 14721 2018-05-02 21:51:21 hzuiflqar@yahoo.c... 10 HAMFEST SALES FOR A SILENT KEY. 14684 2018-05-01 01:55:21 Ashhar Farhan 5 Cores for VHF/UHF balanced mixers 14683 2018-05-01 00:02:16 QRP Labs 1 Re: Digest Number 3036 14677 2018-04-30 17:57:03 wchulley 2 groups.io 14676 2018-04-30 17:57:02 Ken Chase 17 Regen RX problem 14675 2018-04-30 17:57:01 Rod 10 how to drive SBL-1 from CMOS 14662 2018-04-28 12:21:09 boblarkin02 22 Audio Vector Network Analyzer 14661 2018-04-28 11:47:57 zf2scka9p 9 FAR HyCas Circuit Board 14655 2018-04-28 04:10:04 Ravi Miranda 3 Directional coupler - Transformer Saturation question 14650 2018-04-25 11:04:35 iq_rx 8 Sideband Inversion Math 14635 2018-04-17 19:46:39 lawrence_joy 15 PA3AKE "Holy Grail" RCVR Frequency Architecture 14624 2018-04-13 22:26:21 stever1k 4 Progressive Receiver 14614 2018-04-13 16:03:56 Andrew Garello 1 Spectrum analyzer 14610 2018-04-13 13:40:26 richj_focus 42 microcontroller for diy radio 14608 2018-04-07 15:53:20 itsbeen29years 2 Butler VXO from EMRFD for Intermod Testing of RX 14604 2018-04-01 07:04:30 radiog3xaq 5 TR switch diode limiter 14595 2018-03-24 13:32:35 Ravi Miranda 9 Low Pass Filters 14594 2018-03-18 10:46:36 boblarkin02 1 Simple HF receive filters 14584 2018-03-15 15:53:20 iq_rx 11 Audio preamp signal handling 14583 2018-03-15 15:24:38 iq_rx 2 Pot Core applications 14572 2018-03-08 09:50:00 jwolczanski 10 Winding pot-core inductors 14571 2018-03-03 15:52:18 Rod 1 p.s. to cheap logic analyzer and windows 14570 2018-03-03 15:51:58 Rod 1 cheap logic analyzer 14562 2018-03-02 11:01:26 Ashhar Farhan 9 signal handling of audio-preamp in receivers 14558 2018-02-28 09:10:59 gamma_function 4 Connecting variable capacitors 14528 2018-02-10 07:06:02 i7swx 30 Silicon Labs Si549 14525 2018-01-30 22:08:08 w0ep 3 component question - vernier drive 14520 2018-01-19 18:13:25 Ashhar Farhan 3 lecher lines 14518 2018-01-19 11:19:07 w7zoi 1 politics 14513 2018-01-17 09:17:33 p1eiades 3 For sale - R2 Pro 14507 2018-01-14 10:55:15 Rod KM6SN 1 interrupt driven encoder software for ATMEGA328 14503 2018-01-09 18:43:13 Jim Strohm 8 2018 ARRL Handbook 14497 2018-01-09 07:54:46 Ravi Miranda 10 Reverse polarity protection Diode 14469 2017-12-29 16:36:09 Ravi Miranda 3 Sizing of WV of capacitors for an LPF 14467 2017-12-26 10:02:18 jwolczanski 7 Binaural receiver finished 14465 2017-12-23 04:23:36 QRP Labs 1 High Speed Class E Drivers for Paralleled BS170 14464 2017-12-22 17:08:02 kc0vsj 1 High Speed Class E Drivers for Paralleled BS170 14460 2017-12-04 09:39:11 Rod 1 how I changed my Yahoo email address for the group 14453 2017-11-28 07:25:36 nm0s_qrp 9 Announcing - the FDIM2018 2N2222 POWER CHALLENGE! 14447 2017-11-26 13:12:24 boblarkin02 7 High value Chip Capacitors for Bypass and Filtering 14442 2017-11-17 21:52:31 skipp025 5 ICM OX Modules - Invformation available on line? 14419 2017-10-29 16:42:20 rcbuckiii 24 Superhet design questions 14408 2017-10-23 10:02:48 bwbangerter 2 Surplus KVG crystal filters 14392 2017-10-18 14:36:17 billdunsmore@att.... 4 VCA810 RF derived AGC? 14391 2017-10-16 12:13:08 km6sn 3 EAGLE QSD/QSE layout 14387 2017-10-13 23:10:05 mosaicmerc 3 Broadband HF Xformer from Push Pull pA acting like a tank circuit? 14379 2017-10-05 13:39:30 Ashhar Farhan 8 A 435 mhz preamp 14368 2017-10-01 16:22:00 nothdurftm 7 Input/Output Impedance of Crystal Filter 14366 2017-09-28 16:22:12 Jim Strohm 1 Maybe a little OT -- my new microwave project 14355 2017-09-27 10:57:00 rcbuckiii 17 10 KHz wide filter 14352 2017-09-25 08:47:48 mosaicmerc 2 Tenasitor input impedance. 14345 2017-09-22 07:38:25 Hans Summers 3 PIN diode T/R switch 14334 2017-09-19 08:12:15 ab7vf 18 Curve Tracer 14320 2017-09-17 21:00:07 rcbuckiii 2 Signal leve reed relay question 14309 2017-09-17 11:15:40 bwbangerter 31 AD8307 based power meter 14292 2017-09-12 15:03:18 ks1u@att.net 16 Low Power ssb/cw transmitter 1978. 14276 2017-09-07 15:43:33 RodWall1234@Gmail... 6 Re: [emrfd] Re: Would one of these car starters work as a QRP supply 14257 2017-09-05 10:54:53 byjimeny 17 Would one of these car starters work as a QRP supply? 14252 2017-09-03 13:21:34 jwolczanski 5 Binaural Receiver 14235 2017-08-30 19:55:31 vk3hn 16 I2C clock noise getting into RF circuits 14229 2017-08-28 12:04:14 mosaicmerc 8 DIY build of Ebay 45W CW,SSB $14 amp with mods and details. 14216 2017-08-27 11:08:14 Ashhar Farhan 15 Low voltage power amp 14212 2017-08-17 09:04:36 mosaicmerc 6 Gapping an Impedance Transformer to adjust AL 14207 2017-08-10 18:08:20 jwolczanski 6 LO drive 14192 2017-08-06 18:27:25 mosaicmerc 3 Impedance transformer question 14188 2017-08-06 15:39:46 rcbuckiii 16 SMD feed through caps 14180 2017-07-31 22:40:52 mosaicmerc 8 Micrometals Toroid type 26 uses 14179 2017-07-31 22:39:39 mosaicmerc 1 Converting a 500W Tesla pulser into CW 14171 2017-07-27 16:26:28 timshoppa 7 Common-base differential mic preamp 14167 2017-07-26 21:02:37 Ashhar Farhan 5 the pain of va3iul 14160 2017-07-21 12:30:35 aa0zz 7 LTSPICE model for RD100HHF1 14150 2017-07-10 09:08:05 martinfilbertjarv... 10 Capacitors for tx output lpf and bisaing Mosfets? 14149 2017-07-10 04:04:33 joe living 1 Re: requesting information on feeding balanced antenna with a L matc 14145 2017-07-09 04:49:13 VU3SXN / KC3CWD 4 requesting information on feeding balanced antenna with a L match at 14144 2017-07-07 19:20:00 augustinetez 1 VK5TM DDS Xtal Sub 14133 2017-07-03 13:55:14 rcbuckiii 10 J310 Source and Drain Swap 14128 2017-07-02 13:27:44 Dana Myers 1 Si5351A output drive waveform and observations 14118 2017-07-01 10:13:53 ka3j12 2 Measuring Harmonic Suppression with Tek TDS1002B 14086 2017-06-28 00:16:23 Hans Summers 40 Si5351A: facts and myths 14074 2017-06-27 11:08:39 RodWall1234@Gmail... 1 Re: [emrfd] Affordable high-power RF caps 14069 2017-06-26 19:27:14 rcbuckiii 17 Question grounded gate amplifier for receiver 14068 2017-06-26 15:57:28 Gary Johnson 1 Affordable high-power RF caps 14066 2017-06-26 10:00:41 Ray Anderson 2 Re: Digest Number 2933 14058 2017-06-24 17:30:53 Vern VanZ 4 Ebay DDS VFO board 14054 2017-06-23 12:24:55 wb9kzy 9 noise: 6AL5 versus semiconductor diodes 14053 2017-06-23 10:44:36 rcbuckiii 2 Free old 15 MHz Scope, Phoenix Pickup only 14052 2017-06-20 00:36:26 mosaicmerc 1 Moving on 14048 2017-06-19 14:31:00 RodWall1234@Gmail... 3 Re: [emrfd] PCB conversion? 14032 2017-06-18 11:54:09 Chris Trask 2 Somewhat OT: Paypal Dysfunction 14029 2017-06-17 21:08:23 AD7ZU 2 3.3v TI 3253 mux as a QSD? 14025 2017-06-17 09:02:46 John Levreault 2 To a nice home? 14021 2017-06-16 15:18:03 mosaicmerc 20 Rubidium atomic clock 14011 2017-06-13 13:30:03 John Levreault 2 My apologies... 14007 2017-06-13 10:11:36 itsbeen29years 3 Recommended IF bandwidth for CW (Cohn) Crystal Filter 13986 2017-06-09 12:47:01 mosaicmerc 6 VHF/FM broadcast question 13979 2017-06-06 11:52:27 prysm678 4 is phase noise additive? 13973 2017-06-05 09:04:22 richard kappler 11 Capacitance and inductance 13969 2017-06-04 23:26:46 Hans Summers 3 Re: Digest Number 2917 13948 2017-05-31 20:15:46 Michael Miller 1 Looking for 1990s xicor xk68 13946 2017-05-31 17:00:07 xb6zmeyanbsxhnbt2... 41 KK7B kits 13943 2017-05-30 21:36:31 John Stevens 1 Test Equipment and Station Gear from the Estate of Jerry, W5JH 13935 2017-05-30 06:39:55 Tayloe, Dan (Noki... 1 Re: C0G cap variation? 13917 2017-05-27 10:13:44 Ashhar Farhan 15 Q of capacitors, SMD et al 13905 2017-05-25 17:01:37 vk3hn 6 SA630 RF switch for bandpass filter selection 13903 2017-05-25 10:03:56 Ashhar Farhan 18 high q smd capacitors 13902 2017-05-22 08:46:22 wchulley 1 W7EL Balun talk at PARC 13887 2017-05-18 20:17:55 nothdurftm 14 Help with non-performing Updated Universal QRP Transmitter 13882 2017-05-17 20:27:43 xb6zmeyanbsxhnbt2... 3 IMD intercepts for JFETs 13880 2017-05-17 07:36:47 bob_ledoux 4 Farhan Visits W7ZOI 13856 2017-05-11 17:19:46 tfr001@myfairpoin... 9 FFT in LTSPICE 13853 2017-05-11 04:09:54 k1rf_digital_stev... 26 Low cost test equipment 13851 2017-05-10 11:34:48 swift_glen 2 low-loss extreme impedance matching 13848 2017-05-08 09:13:05 lmeeny 3 Lead inductance vs. package style 13839 2017-04-29 12:22:35 pbbonham 2 piezoelectric resonator / crystals 13828 2017-04-28 09:35:18 Nick Kennedy 16 Reducing line voltage for old tube gear 13818 2017-04-19 11:56:41 bob_ledoux 6 Wire Wrap Wire for Toroid Transformers 13814 2017-04-19 07:11:43 Cordesses Roland 10 Simple and low cost GPS controlled oscillator 13799 2017-04-13 18:44:42 lmeeny 14 Affects of real component characteristics on BPF response. 13798 2017-04-13 13:59:38 k1rf_digital_stev... 1 More on LC bandpass filter measurements 13788 2017-04-10 05:00:30 Ken Chase 9 BPF testing advice 13786 2017-04-09 20:53:28 AncelB 1 Re: OT: Lead Acid battery regen anecdote - ACdelco 13779 2017-04-07 17:20:51 mosaicmerc 5 OT: Lead Acid battery regen anecdote - ACdelco 13769 2017-04-05 19:57:46 Will Kimber 9 LADPAC 13758 2017-04-05 08:59:22 iq_rx 19 Replacement for AADE Inductance Meter 13757 2017-04-03 10:12:02 don 1 Antenna Compendium book for sale 13743 2017-04-01 21:28:05 skipp025 14 Trying to ID simple dual band vhf/uhf antenna article 13741 2017-03-30 18:50:16 swift_glen 2 OPA860 as a mixer? 13739 2017-03-29 14:36:10 don 2 New copy of EMRFD 13738 2017-03-27 09:02:43 cd40105 1 VFO 5-5.5 mHZ TO 60 metre transmitter ??? 13737 2017-03-25 02:43:43 Hans Summers 1 Re: Digest Number 2865 13727 2017-03-22 07:38:59 Hans Summers 7 QRP Labs VFO/SigGen now has quadrature output mode 13711 2017-03-16 20:20:24 nothdurftm 19 Toroid inductors - Al values vs inductance charts 13710 2017-03-14 21:13:04 RodWall1234@Gmail... 1 Re: [emrfd] headphones 13700 2017-03-13 14:56:15 jwolczanski 8 headphones 13693 2017-03-10 18:30:19 w7zoi 4 International Crystal 13669 2017-03-09 19:36:31 Ashhar Farhan 4 Full duplex transceiver 13665 2017-03-09 15:15:35 nothdurftm 16 IRF510 heatsink insulator 13658 2017-03-05 13:12:37 RodWall1234@Gmail... 8 Re: [emrfd] Disc Ceramic Capacitor "Adjustments" 13653 2017-03-04 12:39:30 bob_ledoux 2 Disc Ceramic Capacitor "Adjustments" 13638 2017-03-02 01:01:23 Baris 15 Super VXO? 13631 2017-02-23 06:03:15 Hans Summers 1 HF Low distortion sinewave Signal Generator kit 13625 2017-02-22 08:23:14 m5evt 2 SMD inductor BPF for receiver 13613 2017-02-20 10:28:41 Baris 14 Measuring coax loss 13607 2017-02-19 09:18:23 geoffrey pike 1 Another VFO 13597 2017-02-17 00:40:30 sohosources 6 My Oscilloscope Okay? 13592 2017-02-16 04:25:35 Baris 18 Resistive bridge 13590 2017-02-12 17:26:41 k1trb 1 Handheld RF scalar network analyzer 13585 2017-02-11 17:08:07 w0pwe 11 Trying to Improve Receiver IP3 13578 2017-02-10 00:22:04 Hans Summers 2 Re: Digest Number 2831 13566 2017-02-08 16:31:56 Jim Leslie 11 Local oscillators for a high level mixer 13562 2017-02-07 20:40:59 ve7pke 2 looking for documentation for R2 T2 and LM2 13524 2017-02-02 22:21:45 Hans Summers 1 Re: PS. Apologies (was RF signal generator) 13516 2017-02-01 23:47:37 Adrian Scripcă 38 RF signal generator 13500 2017-01-28 06:34:53 Adrian Scripcă 16 Help needed - K3NHI sweep generator - pcb design 13488 2017-01-20 18:15:32 bob_ledoux 12 Where is Everybody? 13458 2017-01-09 06:10:46 wb9kzy 30 Lab notebooks ? 13451 2017-01-08 13:53:22 nothdurftm 7 Dumb (and embarrasing) question RE FQPF11P06 QFET 13448 2017-01-06 13:55:53 socijalizam1 3 new EMRFD book 13446 2017-01-06 11:32:53 Jim Leslie 2 Ladpac coils.exe 13436 2017-01-02 19:21:32 zf2scka9p 10 W7ZOI Crystal Oscillator question 13432 2017-01-01 18:51:07 jwolczanski 3 20m XCVR with "discrete Gilbert Cell Mixer" completed 13418 2016-12-31 15:49:32 Rod 7 H mode mixer frequency limits 13417 2016-12-28 11:03:37 ac2gl 1 Help get Kids Involved 13399 2016-12-24 11:16:21 Chris Howard w0ep 18 Antenna pattern with a drone 13371 2016-12-17 20:37:45 ad7zu 7 Grounding Rules? 13370 2016-12-17 18:47:19 Ashhar Farhan 2 yahoo breach 13366 2016-12-17 16:58:23 bob_ledoux 12 Will EMRFD Data Library Remain Available? 13363 2016-12-15 17:49:31 n4dsp_john 14 Billion Accounts Hacked 13353 2016-12-14 08:19:42 Ravi Miranda 11 PIN Diodes 13347 2016-12-07 23:27:40 itsbeen29years 6 LO signal quality for Active JFET Mixers 13342 2016-12-07 07:40:22 joe living 4 Re: Crumbling 'Solid State Design for the Radio Amateur' 13336 2016-12-05 16:52:53 David J Nushardt 1 My progress on Spectrum Analyzer 13316 2016-12-04 17:22:48 bob_ledoux 26 Crumbling 'Solid State Design for the Radio Amateur' 13300 2016-11-24 21:50:34 gamma_function 16 Amateur Radio Techniques (RSGB book) 13291 2016-11-13 00:54:32 Ashhar Farhan 1 A minimal agc 13284 2016-11-09 07:21:51 Ravi Miranda 6 Automatic bias for a MOSFET power amp and power up 13278 2016-11-07 12:02:52 RodWall1234@Gmail... 1 Re: [emrfd] Re: Non-inductive resistors from China 13267 2016-11-06 04:47:26 mosaicmerc 1 Option for Inproved Power driver thermal pads 13266 2016-11-06 04:36:58 mosaicmerc 10 Silver 'plating' 13265 2016-11-05 16:02:49 Chris Howard w0ep 6 how to determine proper bias for a MOSFET power amp 13260 2016-11-04 12:41:09 w7zoi 5 Up from the ashes.... 13256 2016-11-02 18:46:35 wb8yyy_curt 2 Hycas Minor Instability Observed 13249 2016-11-01 18:26:12 wb8yyy_curt 2 HYCAS Board Different than Schematic D4 ? 13241 2016-11-01 09:57:08 Mark Meyer 16 Non-inductive resistors from China 13237 2016-10-31 17:34:56 wb8yyy_curt 4 HYCAS behaving strange 13236 2016-10-29 23:41:25 Mike Czuhajewski 1 Material missing from Nov/Dec 2016 issue of QEX 13228 2016-10-28 15:22:26 Ravi Miranda 8 13.8V 12V and 5v supply question 13227 2016-10-28 11:04:41 Brooke Clarke 1 Re: Looking for advice (and may WTB) -- coax crimp tools, connectors 13215 2016-10-22 09:14:57 k1rf_digital_stev... 5 QRP order 3 Chebychev bandpass filter 13213 2016-10-20 18:15:42 bass.woofer@gmail... 4 Looking for advice (and may WTB) -- coax crimp tools, connectors, ca 13206 2016-10-12 18:42:29 Jim Leslie 7 3rd order Input Intercept calculation 13205 2016-10-12 16:02:19 sa5pmg 12 Specan - questions 13200 2016-10-07 03:45:30 soliton 5 MEMS Oscillators from Microchip 13198 2016-10-05 18:27:14 mosaicmerc 1 O'scope PROBE RF testpoints 13190 2016-09-29 23:48:24 zl1ujg 3 IMD in ceramic capacitors 13185 2016-09-28 01:07:32 RodWall1234@Gmail... 1 Re: [emrfd] LPF BPF 13182 2016-09-27 17:08:05 IEN 7 LPF BPF 13179 2016-09-24 09:58:47 Bill Meara 1 SolderSmoke Podcast 190 is available 13170 2016-09-21 09:24:12 Chris Trask 6 Semiconductor Industry 13166 2016-09-19 18:35:47 kf8zn 2 "Canning Receiver"? Lo-Key 13159 2016-09-18 12:49:01 Chris Trask 10 Mesmerising About Mixers 13146 2016-09-15 07:11:50 Alan Ibbetson 12 How far do you go with circuit simulations before soldering? 13145 2016-09-13 13:36:34 kf8zn 4 MC1350 Cookbook? 13140 2016-09-09 07:11:20 jwolczanski 12 Gilbert Cell output 13130 2016-09-04 16:40:02 David J Nushardt 6 Solid state design 13119 2016-09-04 03:25:51 Ashhar Farhan 5 Inductor Q in LTSpice 13100 2016-09-02 19:19:18 w7zoi 35 Publication Ends 13096 2016-08-28 14:30:07 richj_focus 4 MS-DDS-60 Controller 13087 2016-08-18 18:26:06 kf8zn 9 Minicircuits ADE-1 Question 13060 2016-08-09 02:30:56 nothdurftm 2 Phasing exciter all-pass circuits - 10 pF across feedback resistor 13045 2016-08-08 15:51:12 kerrypwr 31 Output Impedance Of Si570 (CMOS Version) 13042 2016-08-08 09:12:47 K5ESS 3 Question RE EMRFD Fig. 9.82 - 10 pF across feedback resistors 13017 2016-07-15 09:41:04 kf8zn 12 TCA 440 13001 2016-07-06 15:48:02 k1trb 15 Question on Shorted Turns 12998 2016-07-05 17:00:29 cwfingertalker 2 Question on page 3.18 Figure 3.31 crystal filter. 12989 2016-06-30 18:52:40 davidpnewkirk 4 Fun with the 2N7000: Frequency locking and a hybrid pentode/MOSFET m 12987 2016-06-30 12:41:22 jmlynesjr 7 What have I found? 12968 2016-06-24 18:25:25 shaynal01 19 New RF transistor for QRP PA 12966 2016-06-20 05:50:38 Ashhar Farhan 2 The PLL of the Raspberry Pi 12962 2016-06-16 12:15:09 cqer01 3 ADE-1 Mixer Port Swaps 12960 2016-06-16 08:54:29 Ed Miller 2 Test 12957 2016-06-11 18:51:56 justin.kelly_n2to... 3 Conflicting information and quesstion about the SBL1 12954 2016-06-10 10:36:45 farhanbox@gmail.c... 2 filter design and evaluation by grant hansell 12948 2016-06-10 08:51:09 ka3j12 7 9V Li-ion Battery Capactiy 12921 2016-06-06 18:56:45 k1rf_digital_stev... 14 Using 1/2 Tayloe detector with downconversion/image rejection in sof 12912 2016-06-06 07:19:49 ka3j12 20 SI570 vs Si5351 Controversy 12909 2016-06-04 18:22:01 gamma_function 3 Which probes for frequency counter? 12905 2016-06-03 10:26:24 Ashhar Farhan 3 looking under the bonnet of IC-7300 12904 2016-06-03 09:22:29 Ashhar Farhan 3 a simple overtone oscillator 12903 2016-06-03 04:58:09 jorschei 1 What is on the bench and under construction; 12895 2016-06-02 11:03:03 shubham tiwari 1 pcb for sale , for qrp experiments or homebrew , newly design RF - D 12893 2016-06-02 10:47:23 Alberto I2PHD 7 Help for an unknown component 12886 2016-05-31 09:11:31 l_moline 1 Electronics chat 12880 2016-05-29 13:11:12 skipp025 6 Help IDing a Ham Radio Magazine DigiRatt PLL 2 PC board project 12876 2016-05-26 15:14:11 Clutter 4 Characterising Unknown Ferrite Beads? 12873 2016-05-22 08:17:03 William Martin 1 filters 12872 2016-05-22 04:42:44 Ravi Miranda 2 Crystal Filters - IF module 12848 2016-05-19 11:44:01 bob_ledoux 14 Has Martein's Web Page Gone for Good? 12847 2016-05-19 09:11:34 Vern 1 Fwd: The industry's first RF sampling 14-bit, 3-GSPS analog-to-digit 12842 2016-05-18 11:19:08 Jim Leslie 16 Crystal filter insertion loss 12829 2016-05-16 07:20:19 bob_ledoux 3 Yahoo Syrup 12828 2016-05-16 07:11:10 KENNETH CHASE 10 AGC help 12808 2016-05-10 13:56:21 Lasse Moell 3 Cypress to improve on Si570 12798 2016-05-06 23:35:48 sohosources 5 RG-11 Center Conductor? 12794 2016-05-05 12:01:16 Vern VanZ 3 KM5H? 12790 2016-05-04 15:58:15 lmeeny 26 Adjusting IQ Phasing Network in Direct Conversion r\Receiver 12784 2016-05-03 18:54:24 Dave Daniel 2 Re: Books for sale. 12779 2016-05-02 23:25:01 Ashhar Farhan 10 wire rating for RF 12777 2016-05-01 19:17:56 Dave Hartman 1 FS: Dual Power FET 12776 2016-05-01 18:24:05 Rod 1 phasing exciter anomalies 12753 2016-04-29 12:20:42 peter_dl8ov 15 UHF Power Meter Detector Diodes 12744 2016-04-27 14:48:53 jmlynesjr 12 Phase Noise? 12728 2016-04-23 16:36:51 Hans Summers 2 Re: Si570 VFO for 210X (was Re: [emrfd] Measured output impedance of 12724 2016-04-23 10:13:54 Dana Myers 1 Measured output impedance of 74AHC74 vs 74AHC04 12697 2016-04-22 14:23:17 Dana Myers 49 Measured output impedance of various inverters 12695 2016-04-21 12:30:12 Dana Myers 1 Si570 thoughts, part I 12693 2016-04-21 08:52:47 Rod KM6SN 2 LA3PNA all pass board 12683 2016-04-20 06:43:56 Joe Everhart 5 Villard Cage Antenna was Re: Ferrite properties 12682 2016-04-20 02:27:29 Hans Summers 1 New kit: ProgRock, triple programmable GPS-disciplined crystal repla 12657 2016-04-17 07:43:05 Chris Howard w0ep 10 magnetic lines of force 12656 2016-04-16 12:16:04 Ashhar Farhan 1 full duplex radio 12649 2016-04-13 20:48:23 nothdurftm 7 AADE Filter Design Software Potential Problem 12639 2016-04-10 15:20:55 Lasse Moell 25 Ferrite properties 12632 2016-04-09 15:38:48 Bill Carver 3 cores 12627 2016-04-09 11:38:49 Bill Meara 1 SolderSmoke Podcast #186 is available (and it is a lot of fun) 12626 2016-04-09 10:50:00 Ashhar Farhan 8 micrometal's powdered iron toroids 12620 2016-04-08 09:45:57 iq_rx 1 Troubleshooting 12614 2016-04-07 17:06:59 bob_ledoux 9 Seeking Receiver Diagnostic Techniques 12608 2016-04-06 10:01:32 p1eiades 6 Bad news, good news, better news 12584 2016-04-03 08:25:08 bob_ledoux 34 VFO Ovens for a Stable VFO 12561 2016-03-31 20:41:16 Rod KM6SN 7 vfo stability 12556 2016-03-30 23:04:25 gamma_function 19 Stray capacitance in oscillator circuit for IC-based DC receiver. 12544 2016-03-26 11:31:51 va3vfo 12 RF Sweep generator and other test Equip. 12542 2016-03-24 11:44:24 Rod KM6SN 1 woops-meant SN74LVC1G3157 12540 2016-03-24 09:00:16 Rod KM6SN 3 switching mixers and bpf ip3 12525 2016-03-22 10:52:13 Ashhar Farhan 3 and about the lsb carrier crystal for a ladder filter... 12523 2016-03-21 15:56:37 kg4rll@yahoo.com 6 Re: [emrfd] Receiver gain pot question 12522 2016-03-21 15:33:53 motherlessgoose 3 Receiver gain pot question 12519 2016-03-18 15:42:29 Rod KM6SN 3 SI570s 12505 2016-03-17 11:01:32 Vern VanZ 15 Source for si570? 12504 2016-03-15 05:20:10 k1rf_digital_stev... 1 12 MHz quadrature coupled bandpass filter 12499 2016-03-12 04:35:48 Ken Chase 4 RF chokes 12496 2016-03-11 11:30:24 Chris Waldrup 3 PCB for JBOT? 12495 2016-03-10 02:12:24 peter_dl8ov 1 A New Method of Surface Mount Prototyping 12491 2016-03-08 20:53:01 rodwall1234 4 Transmitter efficiency 12487 2016-03-06 12:39:04 Dana Myers 1 fascinating YouTube page: SDR, home-cooked semiconductors, more 12476 2016-03-05 05:26:04 k1rf_digital_stev... 9 4 pole bandpass filter with FSA 4157 switches 12471 2016-03-04 18:34:58 Ken Chase 5 Supply decouple resistor 12468 2016-03-03 16:39:06 arfghans 1 VNAView still available 12461 2016-03-01 08:10:27 mosaicmerc 1 Coil craft choke part selection & impedance graphing online tool 12458 2016-02-28 11:40:42 mleblanc0 3 Beta Cutoff for BJT 12451 2016-02-27 06:33:50 Chris Trask 6 Semiconductor News 12434 2016-02-22 19:48:39 w0pwe 29 RF Switch ICs for Filter Selection 12433 2016-02-22 16:39:24 Bill Meara 1 SolderSmoke Podcast 185 Antennas in February! 12429 2016-02-18 23:13:39 voltspermetre 1 eBay 2 Pole 11 Throw 10mm Panel Mount Ceramic Rotary Select Selector 12407 2016-02-17 09:07:22 KENNETH CHASE 5 Broadband transformer windings 12392 2016-02-16 09:49:10 agustintomasferra... 3 Re: measuring oscillator noise - Could you? 12385 2016-02-16 06:47:07 mdgolfbum 2 Si5351A version improvements? 12354 2016-02-14 18:49:08 Ashhar Farhan 56 measuring oscillator noise 12352 2016-02-14 15:21:38 Daniel Mendes 8 Designing Wideband RF Impedance Transformers 12344 2016-02-11 19:17:53 n1vc 5 2N5179 Top view or bottom view 12342 2016-02-11 14:15:26 Rod KM6SN 1 Powerful data plotting program KST demo upload 12309 2016-02-09 08:12:09 mosaicmerc 14 Microstrip Impedance question 12289 2016-02-07 20:28:33 Ashhar Farhan 18 74L04 as an amplifier 12283 2016-02-07 07:13:27 Ashhar Farhan 6 7 mhz bandpass filter experiments 12263 2016-02-02 13:25:24 Sandeep Lohia 12 OFFTOPIC, HF battery desulphate 12259 2016-02-02 11:45:51 Ken Chase 30 Hycas-Cascode amp 12238 2016-01-29 10:41:32 n1vc 16 Bifilar Torriod independant testing and also SA design question 12237 2016-01-26 00:44:50 Ashhar Farhan 12 electret biasing 12231 2016-01-24 22:43:34 mosaicmerc 4 Envelope tracking 12228 2016-01-24 20:07:26 David J Nushardt 1 My email has been hacked 12223 2016-01-23 15:46:36 vasilyivanenko 8 K3NHI Sweep System build notes + more in 1 zip file 12213 2016-01-21 12:07:04 David J Nushardt 14 What to use to sweep the 100 mhz Specan filter. 12195 2016-01-17 11:23:52 larry_n0sa 10 High Output on Weber Tribander Clone 12190 2016-01-11 18:15:48 Bill Meara 4 R2 audio amp question 12179 2016-01-07 10:39:15 Ashhar Farhan 2 OT: ramsey closing down. remaining kits on amazon 12177 2016-01-07 04:56:01 k1rf_digital_stev... 12 RF Interconnects 12165 2016-01-05 14:55:30 Chris Trask 12 Prototyping SMT Boards 12159 2016-01-04 19:51:25 lmeeny 6 Phase / Gain Adjustments in a Phasing DCR 12156 2016-01-03 17:50:31 Bill Meara 3 Building R2 -- Replacement for LM387? 12151 2016-01-02 15:04:59 n1vc 3 TUF-1H MIXER 12143 2016-01-01 12:04:10 Christer Renströ... 2 SV: Re: SV: Re: [emrfd] Re: Toroid impedance transformers 12134 2016-01-01 09:27:14 Christer Renströ... 5 SV: Re: [emrfd] Re: Toroid impedance transformers 12107 2015-12-29 18:59:22 Ken Chase 36 Toroid impedance transformers 12105 2015-12-29 17:50:58 Chris Howard w0ep 3 VNA elmering needed 12092 2015-12-28 07:07:02 Ravi Miranda 3 OT-Switching ceramic filter+additional stage 12091 2015-12-28 04:59:29 peter_dl8ov 13 High Level RF Mixing 12087 2015-12-27 06:58:38 Bill Kelsey - N8E... 2 Surface mount R2 12085 2015-12-26 19:29:49 Rod 1 r2 etc 12058 2015-12-20 17:28:38 winston376 18 RF Analog Variable Time Delay Solutions 12045 2015-12-19 09:35:36 Ken Chase 14 Termination Insensitive Amp (TIA) 12036 2015-12-18 13:43:17 lawrence_joy 18 PA3AKE Holy Grail RCVR 12011 2015-12-15 08:43:38 Tayloe, Dan (Noki... 10 More sensitive receiver archtiecture 12006 2015-12-14 13:13:08 Claudio Girardi 1 R: [emrfd] IRF510 : how high? 11999 2015-12-14 06:09:14 farhanbox@gmail.c... 26 IRF510 : how high? 11992 2015-12-13 13:44:35 n1vc 7 Grounding the Shield of one or both ends of coax 11981 2015-12-10 03:33:33 Eduardo Alonso 4 CW filters: trade-offs and group delay 11980 2015-12-09 20:57:03 mosaicmerc 7 Probing RF with a 'scope 11975 2015-12-08 20:05:49 afu 4 Am I blocked ???? 11966 2015-12-08 08:02:47 mosaicmerc 4 3GHZ VNA 11958 2015-12-07 12:00:29 n1vc 14 NPO capacitors 11956 2015-12-07 09:31:56 Rod 1 More on KST data plotting 11951 2015-12-06 16:14:50 Rod 2 KST data plotting for filter sweeps 11943 2015-12-05 14:17:15 Jim Leslie 7 Filter alignment 11937 2015-12-04 15:58:12 kerrypwr 9 Fourier Transform Machine 11927 2015-12-03 19:39:28 mdinolfo2001 10 Seeking copy of Dome Dec 1946 "Electonics" article on phase shift ne 11921 2015-12-03 09:12:50 larry_n0sa 9 Single or double sided PCB ? 11920 2015-12-01 13:28:41 w7zoi 5 Free parts and EMRFD Errata 11918 2015-11-27 08:00:47 Rod 1 more on 2sc5337 11917 2015-11-27 08:00:43 Rod 1 r.e smd post mixer transistor 11911 2015-11-26 09:42:50 bob_ledoux 6 Question: What SMT Transistor for Post-Mixer Amp 11909 2015-11-25 20:37:57 skipp025 2 General Radio 1650-A Impedance Bridge Manual and Ap Notes 11900 2015-11-21 06:41:56 Ashhar Farhan 9 a new low phase noise clock from si 11896 2015-11-17 21:57:10 mosaicmerc 4 Getting into RF design 11894 2015-11-17 02:46:43 petervk3ye 2 6.11 A portable DSB/CW 50 MHz station 11887 2015-11-15 18:09:44 Phil Sittner 6 AADE Frequency counter 11880 2015-11-10 13:05:25 l_moline 3 Matching networks for RF Power Amplifiers 11879 2015-11-06 21:53:14 paulchebi 1 Difficulty running Specan.exe 11867 2015-11-02 22:35:27 Adrian Scripcă 26 W7ZOI/K7TAU spectrum analyzer saga continues 11865 2015-10-31 15:58:08 w7zoi 1 QST Spectrum Analyzer Trick or Treat 11856 2015-10-26 21:54:27 sohosources 6 Help to Identift Donor Parts? May be a bit OT 11849 2015-10-25 17:18:57 Phil Sittner 7 FT Transformer power capacity 11848 2015-10-25 07:08:52 kg9dk_john 1 source for Si570 11847 2015-10-24 22:29:36 David J Nushardt 5 Analog Circuit Design: Art, Science, and Personalities - Google Book 11831 2015-10-23 07:38:39 kg9dk_john 7 source for Si570 LVDS 11824 2015-10-22 08:40:58 Ravi Miranda 8 Current replacement for 2SC1906? 11820 2015-10-21 22:14:19 Neil Martinsen-Bu... 6 LPF vs BPF for homebrew transceiver design 11810 2015-10-19 09:09:14 Andy Talbot 6 Classic Multiple Feedback OPA BPF 11808 2015-10-19 07:22:07 peter_dl8ov 2 Reply From Analog Devices 11806 2015-10-17 21:04:16 Jerry Haigwood 5 My Illness 11784 2015-10-15 12:46:31 peter_dl8ov 23 A Quick Math Problem 11783 2015-10-15 11:15:01 harizyacine 1 simple microcontroller oscilloscope Query 11779 2015-10-14 09:43:35 Rod 1 more on function generator 11777 2015-10-13 15:00:37 John Lawson 2 Re: emrfd] QST SA 110MHz bandpass filter nearly complete but I have 11766 2015-10-12 11:00:47 n1vc 8 QST SA 110MHz bandpass filter nearly complete but I have a few quest 11764 2015-10-12 09:16:53 lawrence_joy 15 Function Generator 11758 2015-10-11 07:15:45 peter_dl8ov 6 Cannot Read Messages From Dana Myers & Others 11744 2015-10-08 16:48:15 Russ Hines 10 Looks like they're BAAACK... again. ;-) 11735 2015-10-05 14:27:28 Alan Ibbetson 8 Powdered iron toroid loss question 11729 2015-10-05 09:18:10 kg4rll@yahoo.com 1 Re: [emrfd] Switching Questions 11722 2015-10-03 17:25:31 kerrypwr 10 Bridge-T Diplexer Report 11718 2015-10-03 10:02:44 kg4rll 11 Switching Questions 11710 2015-10-01 00:35:20 rodwall1234 2 Squeeze More Performance Out of Toroidal Inductors... 11703 2015-09-29 09:09:35 John Lawson 1 Re: emrfd] Re: Atlas 210x reboot 11672 2015-09-26 12:48:10 bob_ledoux 17 Question about Toroid Winding Protocol 11669 2015-09-25 19:18:47 farhanbox@gmail.c... 29 Atlas 210x reboot 11649 2015-09-23 16:28:56 Jim Miller 3 BLF188 Class E? 11639 2015-09-21 23:57:46 kerrypwr 27 Bridge-T Diplexer 11637 2015-09-14 04:39:04 Ashhar Farhan 1 A simple RTTY generator 11633 2015-09-13 12:10:28 rspanbauer 5 Amidon/Micrometals AL value derivation 11624 2015-09-10 20:02:39 Ashhar Farhan 7 AD8310 vs AD8307 11609 2015-09-09 22:29:44 ve6jf 17 Looking for a datasheet.. 11604 2015-09-08 08:49:54 Rod 4 files have been uploaded to show xtal filter scans 11598 2015-09-07 18:41:34 Phil Sittner 6 ladpac2002 11593 2015-09-07 09:22:27 Ken Chase 1 Re: [Bulk] RE: [emrfd] BCI problems 11589 2015-09-06 18:22:46 Ken Chase 9 BCI problems 11583 2015-09-05 07:25:51 ravimiranda 6 Source Coupled JFET - Oscillator 11578 2015-09-04 02:57:20 Joe 2 Relay Maintenance 11576 2015-09-03 17:51:40 stever1k 1 Kanga Spectrum Analyzer and Tracking Generator Available 11572 2015-08-31 07:59:19 Ashhar Farhan 4 Interview with W1HFA (do you know him?) 11571 2015-08-30 23:41:06 David J Nushardt 1 Emailing construction_notes-2.pdf 11570 2015-08-30 23:35:27 David J Nushardt 1 Emailing IF_LOG_AMP_PCB.pdf 11565 2015-08-29 14:16:20 n1vc 1 Forget the piston trimmer.... problem solved 11563 2015-08-29 14:15:15 n1vc 4 Piston trimmer question 11554 2015-08-27 17:17:00 n1vc 11 Another Spectrum Analyzer question 11539 2015-08-26 08:42:06 Ashhar Farhan 17 Specan - A reboot of the W7ZOI/K7TAU spectrum analyzer 11530 2015-08-24 21:38:28 Adrian Scripcă 10 Re: Feed through capacitors source (Was: Looking for W7ZOI/K7TAU Spe 11521 2015-08-22 11:00:25 Russ Hines 3 AADE 11516 2015-08-21 16:52:35 n1vc 14 Kanga Spectrum Analyzer kit found but... 11506 2015-08-20 12:32:57 swift_glen 10 multi-hole ferrite transformers 11499 2015-08-16 18:08:33 John Lawson 7 Re: emrfd] Re: Looking for W7ZOI/K7TAU Spectrum Analyzer kit 11493 2015-08-12 19:09:28 jwolczanski 3 "Diplexer" from a 1980's homebrew DC transceiver 11486 2015-08-10 18:22:34 Henry 2 FS: Variable Capacitors 11480 2015-08-10 09:00:58 ka7exm 1 Regarding for sale postings 11477 2015-08-10 08:58:26 jmlynesjr 2 Elsie and Wine 11476 2015-08-10 08:58:19 Rod 6 R.E +60 dBm IP3 - forgot to mention, 12 volt system 11475 2015-08-10 08:58:16 Rod 1 need suggestions for +60 dBm IP3 HF device 11462 2015-08-09 07:11:26 peter_dl8ov 12 The Black Art of DBM Mixer Termination 11448 2015-08-08 06:04:42 jorschei 1 ACTIVE ANTENNA 11395 2015-08-05 19:47:54 bob_ledoux 57 Powering a Performance Receiver with 5 Volts 11390 2015-08-02 20:50:06 bob_ledoux 2 Electrolytics as Ugly Standoffs 11387 2015-08-01 20:00:35 Ravi Miranda 3 Help - off topic [Original 2SC3133] 11383 2015-07-30 17:17:19 Henry 1 FS: Dual variable inductors 11380 2015-07-30 11:25:30 peter_dl8ov 6 The Problem of the 'T2 Pro' Output Stage 11368 2015-07-25 16:00:26 Chris Trask 1 High Dynamic Range Front-End Amplifiers 11354 2015-07-24 11:17:11 peter_dl8ov 2 Quadrature Signal Splitters 11348 2015-07-23 18:22:28 k1rf_digital_stev... 19 Question on digital version of allpass filters 11329 2015-07-18 14:14:34 zl2tca 9 PIC Micro Code 11328 2015-07-18 12:05:41 Nick Kennedy 5 Arduino controlling Si570 11319 2015-07-16 13:32:21 jmlynesjr 19 Reverse engineering a BPF? 11318 2015-07-11 13:32:53 cwfingertalker 1 K7S Salmoncon 11315 2015-07-10 13:40:27 Henry 3 WLW's 500,000 Watt Transmitter 11309 2015-07-06 12:34:10 Ashhar Farhan 6 A simple 25 watt linear 11300 2015-07-04 16:12:01 Ashhar Farhan 5 sweeperino 11296 2015-07-04 11:46:17 Nick Kennedy 9 Math tools for electronics 11288 2015-07-03 13:03:44 Ashhar Farhan 4 doug's book on learning transistors 11276 2015-07-02 11:38:28 Ashhar Farhan 4 W1FB's rigs in ARRL museum 11273 2015-07-02 10:19:56 n2msqrp 15 Are through hole devices going the way of the vacumn tube? 11270 2015-07-01 16:51:52 kg4rll@yahoo.com 1 Re: [emrfd] Measuring inductance 11264 2015-06-30 22:45:59 ve6jf 8 Measuring inductance 11242 2015-06-26 15:26:04 Will 4 AD2200 synchronous demodulator 11240 2015-06-26 13:36:53 ve6jf 13 Hybrid Cascode IF for 5mHz 11234 2015-06-22 19:43:34 bob_ledoux 1 Altering Crystal Frequencies 11225 2015-06-21 23:07:58 Ashhar Farhan 2 rocket's heat shield and the plasma form a series bandpass filter on 11212 2015-06-20 18:45:47 lmeeny 10 Tayloe Mixer Difficulties 11211 2015-06-20 11:31:18 Chris Howard w0ep 1 July QST Technical correspondence 11203 2015-06-16 21:13:48 Ashhar Farhan 9 A low distortion QRP linear 11199 2015-06-16 16:45:32 Thomas S. Knutsen 4 Reflow soldering QFN, was: Low IMD driver IC 11171 2015-06-12 13:26:21 wb9kzy 12 Quadrature LO from 2x clock input: LT5517 11168 2015-06-12 11:58:18 ashhar_farhan 19 Low IMD driver IC 11159 2015-06-11 11:53:15 ve6jf 9 Return loss bridge 11149 2015-06-08 19:43:10 jwolczanski 5 2009 presentation on high-level mixers 11140 2015-06-07 02:25:50 Adrian Scripcă 4 Looking for W7ZOI/K7TAU Spectrum Analyzer kit 11139 2015-06-06 21:13:48 Ashhar Farhan 2 s-match atu 11118 2015-06-04 14:01:02 Christer Renströ... 9 SV: Re: [emrfd] Discrete component version of Gilbert Cell Mixer 11110 2015-06-02 18:25:56 jwolczanski 28 Discrete component version of Gilbert Cell Mixer 11086 2015-05-16 19:24:57 Nick Kennedy 21 phasing RX all-pole filter design 11085 2015-05-16 07:57:49 Bill Meara 1 SolderSmoke Podcast 176: Terminaiton Insensitivity, Sideband Inversi 11083 2015-05-15 07:02:23 jliving2001 2 Antenna Tuners and Baluns 11067 2015-05-06 12:25:08 jliving2001 14 CW Waveshaping 11060 2015-05-02 10:42:35 jorschei 2 Bi Directional amplifiers in the IF strip 11053 2015-05-01 21:40:40 Ashhar Farhan 2 doubly balanced diode mixers and RF-IF port isolation 11050 2015-05-01 13:22:38 jorschei 3 Tests with the SDR receiver 11032 2015-04-30 12:15:21 Bill Kelsey - N8E... 1 Dayton Booksale 11027 2015-04-30 09:53:01 w7zoi 33 JAN Crystals 11019 2015-04-29 08:58:32 winston376 9 Current Source(s) for High Q Crystals 11017 2015-04-28 21:53:16 kb9fko 5 experimentalists 11006 2015-04-27 04:51:48 k1rf_digital_stev... 9 Question on hybrid connected crystal filters 11004 2015-04-25 15:19:46 k5dw 1 PICAXE Components FS - SOLD 10992 2015-04-23 21:51:43 Ashhar Farhan 5 using ladbuild for notch filters 10991 2015-04-23 12:30:53 cwfingertalker 10 Noise Blanker circuits 10989 2015-04-20 12:31:41 Ashhar Farhan 3 antennas out of dielectric materials? 10985 2015-04-20 02:59:13 Kirk Kleinschmidt 4 Will the Real SWR Please Stand Up? 10984 2015-04-19 23:58:59 Kirk Kleinschmidt 1 Attachment Test. Please Disregard. 10981 2015-04-16 14:38:37 Ken Evans 3 FDIM 2015 Homebrew Contest 10974 2015-04-11 12:48:51 chris_yes92 6 SBL-1 mexer 10967 2015-04-08 08:38:13 Ronan McAllister 4 Advice on textbook references to inter-stage, wide-band RF coupling 10964 2015-04-07 20:14:53 rcbuckiii 7 Bandpass Filter Design 10962 2015-04-06 22:16:15 Henry 1 FS: Variable Capicators 10959 2015-04-03 11:34:01 peter_dl8ov 2 4.9152 MHz Crystals 10947 2015-03-29 18:32:48 Henry 7 OT: Crystals go to war 10943 2015-03-28 13:03:03 n0ksf 4 10.7 mhz if transformer 7-8341 10931 2015-03-26 22:53:25 kerrypwr 18 Amplifier Design 10928 2015-03-25 08:48:22 farhanbox@gmail.c... 2 heathkits 10907 2015-03-20 22:51:10 Kirk Kleinschmidt 7 Optoisolator Question 10899 2015-03-20 12:59:02 ian_mccrum_mi5afl 12 Measuring output return loss at low powers 10885 2015-03-17 20:04:46 farhanbox@gmail.c... 11 Re: Power calculations 10875 2015-03-17 08:42:25 genedorcas 13 lettering 10869 2015-03-17 11:39:02 Graham / KE9H 1 Re: Power calculations 10867 2015-03-17 07:27:56 l_moline 5 Electronics Courses 10861 2015-03-17 04:56:10 jmlcs2000 15 Source for crystals 10824 2015-03-13 12:31:45 Nick Kennedy 13 Audio level for DSB full modulation with DBM modulator 10812 2015-03-13 09:18:56 k1rf_digital_stev... 29 Mizer front end question 10808 2015-03-12 12:44:00 dave081360 1 Great CWTD episode last night on the SNA ... Podcast posted! 10802 2015-03-11 19:07:58 Ashhar Farhan 14 EMRFD CD on Linux 10801 2015-03-10 13:09:41 dave081360 1 CWTD airs tonight at 8pm EDT (0000z) ... review of Scalar Network An 10795 2015-03-09 09:40:28 dave081360 1 Chat With The Designers is back! 10792 2015-03-08 18:56:21 bob_ledoux 8 NE567 Tone Decoder for Receiver Filter 10785 2015-02-25 14:11:09 Kirk Kleinschmidt 2 Apache AL13P Laminator is Back 10779 2015-02-25 10:10:30 Ronan McAllister 11 Input on free or inexpensive eda 10778 2015-02-23 13:45:21 Henry 1 FS: High amp AC ampmeter 10777 2015-02-22 11:33:35 Henry 1 FS: Round cover for the Mercury paddle 10774 2015-02-09 12:52:27 ve3jc 2 FS: Die-cast Enclosures & Connector Kit (for Spectrum Analyzer proje 10772 2015-02-09 12:39:39 shubham VU3SXN & ... 3 requesting support in building a all discreet 27.00MHz CB ssb tran 10762 2015-02-06 13:56:03 bob_ledoux 3 Some Thoughts on Phase Delay Networks for DC Receivers 10760 2015-02-06 09:39:49 johnjdignan 5 Help with VHF band pass filter? 10759 2015-01-27 19:16:49 Dana Myers 1 Generic RF-oriented Si5351A3 library posted to GitHub 10752 2015-01-23 21:19:47 Henry 1 FS panel meters 10749 2015-01-22 07:33:24 Chris Howard w0ep 3 general question about DDS chips and such 10742 2015-01-20 17:08:52 prose062 5 ladder filter question 10740 2015-01-20 11:46:29 Dana Myers 9 Si5351A output level vs power into 50 ohms and mixer levels 10737 2015-01-19 11:31:23 Chris Howard w0ep 6 QEX free for shipping 10733 2015-01-18 11:37:12 Chris Howard w0ep 3 mystery of filters 10718 2015-01-16 03:21:04 Alan Melia 1 Homemade ceramic coil forms 10710 2015-01-15 15:28:35 bob_ledoux 21 Making Ceramic Coil Forms 10696 2015-01-09 22:23:09 Ashhar Farhan 16 si5351 10691 2015-01-06 19:25:30 winston376 5 Guanella Brown-Boveri Article 10690 2015-01-06 06:21:23 Ken Evans 2 FDIM2015 10686 2014-12-31 03:36:23 Ravi Miranda 4 Help!! Problems with a Cub Frequency Counter [Off topic] 10650 2014-12-20 19:20:41 bob_ledoux 34 Transistors for JBOT Amp 10643 2014-12-19 19:17:22 Chris Howard w0ep 8 high resistance inductor 10642 2014-12-19 10:03:33 joe living 1 Speaking of January 2015 QST 10629 2014-12-18 09:20:54 zx97lite 8 January 2015 QST "Hybrid HF Transmitter" Using a 455 kHz IF 10628 2014-12-18 09:19:21 Henry 1 10 trun pots for sale 10616 2014-12-17 12:14:44 genedorcas 5 my ebook on building a receiver 10605 2014-12-16 13:19:14 Chris Howard w0ep 23 Audio filter ringing 10598 2014-12-12 12:44:25 Nick Kennedy 2 Re: What if all through hole went obsolete ?? 10559 2014-12-10 07:43:46 richj_focus 41 What if all throuhg hole went obsolete ?? 10550 2014-12-08 17:43:10 Hari G 1 All pass filter 10540 2014-12-05 19:17:46 David Snowdon 4 On-Semi ending TO-92 production (Was: TO-92 J310 FETS Now Obsolete) 10515 2014-12-04 15:54:17 bob_ledoux 33 TO-92 J310 FETS Now Obsolete 10512 2014-12-03 20:40:08 Robert Fish 3 Potentometers 10495 2014-11-26 16:59:55 Donald Kelly 14 EMRFD: Mini Circuits sale 10493 2014-11-25 08:42:01 raccoonnyc 10 Si5351 VFO/BFO 10483 2014-11-23 04:07:08 n1vwd 3 RG174 coax stripper 10481 2014-11-22 19:03:11 Jerry Haigwood 9 Grounding coax cable 10480 2014-11-21 06:56:50 timshoppa 2 Peak-reading meters 10477 2014-11-15 19:16:33 cqk1jeb 3 IC-765 Total Gain Pot R414 10467 2014-11-14 20:12:45 Kirk Kleinschmidt 2 FT200 10454 2014-11-14 09:35:16 Ashhar Farhan 20 retrieving submerged components and rigs 10453 2014-11-14 05:39:43 i7swx 1 A NEW VNA 10433 2014-11-09 17:08:25 Mark Meyer 1 Re: Digest Number 2232 10430 2014-11-09 04:50:08 jliving2001 5 Audio Amplifiers 10424 2014-11-06 16:15:05 arfghans 1 EEV Blog, great lessons in practical electronics 10421 2014-11-05 18:19:59 dualraoul 8 FS EZ-kit lite and books 10417 2014-11-05 10:10:00 bob_ledoux 1 Choosing R and C Values for Active Filters 10410 2014-11-03 19:02:43 mmeyer504 3 SWR Protection 10407 2014-11-02 01:21:21 Weddig, Henning-C... 2 AW: AW: [emrfd] Losses in Diplexer? 10393 2014-10-31 06:45:48 Jim Miller 13 SA602 Max recommended oscillator input? 10388 2014-10-26 12:18:15 Weddig, Henning-C... 6 AW: [emrfd] Testing Xtal Ladder Filter Impedance 10387 2014-10-26 10:33:58 Weddig, Henning-C... 7 AW: [emrfd] Losses in Diplexer? 10385 2014-10-26 10:20:26 Steve VK2SJA 4 Losses in Diplexer? 10364 2014-10-10 22:23:10 Henry 2 FS: 10 turn potentiometers 10358 2014-10-09 12:05:23 jliving2001 21 Old Toko 10.7Mhz IF transformers 10354 2014-10-06 17:42:37 Chris Waldrup 4 Ham to do SMT work 10340 2014-10-05 10:49:53 Don AE5K 10 Looking for ham doing SMT as service 10333 2014-10-03 15:45:51 Chris Howard w0ep 7 from I to I/Q 10331 2014-10-02 18:03:39 farhanbox@gmail.c... 2 vhf transceiver modules 10309 2014-09-27 10:12:43 peter_dl8ov 12 T2 Phasing Network capacitors 10308 2014-09-27 10:11:39 peter_dl8ov 11 Coax Connections Within Equipment 10289 2014-09-23 17:16:20 Chris Howard w0ep 22 A materials question - pcb as capacitor 10285 2014-09-20 09:45:42 ka3j12 1 Free Tektronix Scope and Signal Generator, 100' RG-213 and More 10270 2014-09-19 08:04:33 Jason Burke 18 Seeking Low Voltage Broadband Amplifier for VHF/UHF Operation 10269 2014-09-18 14:57:50 Henry 2 FS: Spin Master 4803 Hotplate Stirrer 10256 2014-09-15 17:30:12 Phil Sittner 13 WA7EXM Power Meter 10253 2014-09-13 19:17:28 Ashhar Farhan 3 guanella 10249 2014-09-13 05:45:56 genedorcas 8 Birdies from WI-Fi router 10246 2014-09-12 07:58:43 Qrp Gaijin 1 Comments on WBR receiver antenna coupling 10234 2014-08-12 04:59:15 i7swx 1 For those that bought HF Radio Systems & Circuit - Software Programs 10226 2014-08-08 04:05:41 i7swx 4 STEFAN, LZ1OV, SK – 1ST ANNIVERSARY 10212 2014-08-06 03:13:09 i7swx 8 HF Radio Systems & Circuits Book - WARNING 10208 2014-08-05 18:41:00 farhanbox@gmail.c... 28 imd of unequal levels 10198 2014-08-03 18:06:39 Edwin Carter 6 To change the subject, a different question 10194 2014-08-03 15:02:19 Tasos V 7 Variable caps in the uk? 10190 2014-08-02 08:58:09 Dennis Anderson 1 (no subject) 10186 2014-08-01 21:16:14 lawrence_joy 5 Morse Code Keyer 10179 2014-07-30 04:00:24 genedorcas 7 tubes I don't need 10178 2014-07-26 04:49:53 Alan Melia 1 re Yahoo Groups 10177 2014-07-25 16:19:29 n2cx2001 3 WTB Autek VA-1 10175 2014-07-25 01:46:47 Alan Melia 2 re query etc Yahoo Groups 10173 2014-07-24 00:52:52 blumu 1 Query re : Changes to how you access Yahoo Groups 10172 2014-07-23 15:57:52 harizyacine 3 fet transistor 10164 2014-07-20 15:57:25 harizyacine 8 transistor amplifier 10163 2014-07-20 11:28:45 Tasos V 1 parts list for the experiments? 10161 2014-07-18 11:58:03 Ashhar Farhan 2 “Experiments with Primitive FET Mixers" pdf 10150 2014-07-14 11:27:37 bob_ledoux 1 What Does Tayloe Detector Output Look Like On a Scope? 10133 2014-07-11 15:39:30 k7tfc 9 Series capacitance G3UUR Test Oscillator 10122 2014-07-11 08:10:37 Chris Trask 29 Motorola Application Notes 10119 2014-07-01 01:50:21 ad5rj_slash_7 1 Crystals for S7C Simple 7 MHz Superhet 10112 2014-06-29 11:13:28 Chris Howard w0ep 4 free: noise blanker article delay device 10105 2014-06-27 11:45:35 m5evt 9 Class E amplifier design 10099 2014-06-12 19:34:50 Ed Manuel 6 S.A. - Relays 10097 2014-06-12 10:30:08 Ed Manuel 2 W7ZOI/K7TAU Spectrum Analyzer 10096 2014-06-05 12:50:55 dl8ov 1 To All Who Assisted With My Power Supply Problem 10094 2014-06-03 23:38:42 Henry 3 Solder for sale 10086 2014-05-31 09:51:20 jerryk5lru 3 Introduction and advice calibrating the chapter 7 wattmeter 10081 2014-05-30 17:31:03 Glen Leinweber 8 Low-noise audio amps 10080 2014-05-30 11:37:43 Chris Trask 1 Re: requesting for support in constructing a 20 m/14mhz band 10 to 2 10077 2014-05-30 09:24:13 shubham tiwari VU... 3 requesting for support in constructing a 20 m/14mhz band 10 to 25 wa 10073 2014-05-28 10:07:39 dl8ov 4 Switched Mode Power Supplies 10067 2014-05-25 00:00:44 ashhar_farhan 5 scope trouble. 10061 2014-05-23 21:26:52 Jerry Haigwood 5 VFO PCB 10050 2014-05-23 09:36:01 Alberto I2PHD 11 Going from 5W to 100W 10044 2014-05-20 19:33:15 Neil Martinsen-Bu... 8 Debugging help: chapter 1 first transmitter low power output 10040 2014-05-19 18:13:39 Dana Myers 3 Ge diodes: 1N34A vs 1N60 vs AA143 10035 2014-05-18 21:01:17 Jason W6IEE 6 2.98 hexfet linear amp, what am I missing? 10030 2014-05-17 16:15:55 Jerry Haigwood 5 Cutting PCB 10029 2014-05-14 20:36:25 George N2APB 1 Re: Calibration thoughts for popcorn power meter [SQM Kit] 10018 2014-05-13 10:14:12 Henry 10 HTML messages 10015 2014-05-13 07:45:35 Dave Hartman 1 OT: Blonder Tongue FSM-6B 10007 2014-05-12 09:22:29 Neil Martinsen-Bu... 10 Calibration thoughts for popcorn power meter 10003 2014-05-09 01:23:56 Joe 4 Ping 9993 2014-04-30 18:54:27 bob_ledoux 9 How Do You Attack Audio Amp Motorboating? 9979 2014-04-29 03:22:38 Bob 4 Decoupling capacitors 9961 2014-04-27 21:25:18 bob_ledoux 17 State-of-the-Art Op Amps Require A Sense of Humor 9960 2014-04-27 10:32:58 Michael Dunn 1 OT?: EDN Design Ideas 9959 2014-04-27 10:31:55 David C. Partridg... 12 Question about RF amp ICs and MMICs 9958 2014-04-26 17:03:26 Mark Meyer 2 Problems with Digital Freq Readout 9950 2014-04-25 09:38:40 mmeyer504 9 Digital Readout Noise Problems 9944 2014-04-23 22:31:31 Ashhar Farhan 5 A new high level mixer the LT5551 9937 2014-04-21 22:18:17 rcbuckiii 6 Best way to cut open crystal filter? 9935 2014-04-21 13:03:06 Mike Czuhajewski 2 Cutting PCB material with a benchtop shear 9934 2014-04-21 12:12:21 Sandeep Lohia 1 FS7140, FS7145 9922 2014-04-18 13:15:27 w5jhjerry 14 Scoring PCBs to be broken apart 9919 2014-04-18 04:38:27 petervk3ye 3 VXOs - pulling crystals up 9918 2014-04-17 11:10:32 Bill Kelsey - N8E... 1 Kanga at FDIM 9906 2014-04-10 08:11:12 Alberto I2PHD 12 Wide range oscillator 9905 2014-04-10 05:16:07 Jim Stafford 1 CLUB NIGHT and HOMEBREW competition at FDIM 2014 9904 2014-04-06 14:45:44 David Nushardt 1 DDS Signal Generator Direct Digital Synthsis 9900 2014-04-06 12:37:06 zx97lite 4 Off Topic: March 1993 QEX Article Needed 9882 2014-03-29 08:49:55 ehydra 1 Looking for cable spec FT253 or FG253, mutual inductance 9873 2014-03-27 09:28:11 mengelg 4 Kanga US 9863 2014-03-24 09:15:30 johnjdignan 1 Help with a VHF broadband amplifier and filters? 9862 2014-03-24 04:42:02 jmlcs2000 25 FT37-J core 9842 2014-03-19 09:14:30 Joshua Lynch 5 PCBs for Steve Hageman's HighZ FET probe 9837 2014-03-18 17:58:58 gt25psi2002 4 Biasing a NPN for Optimal Q-Point 9826 2014-03-16 02:34:36 parkerp 1 Re: binaural weekender 9823 2014-03-15 10:20:47 sohosources 18 Binaural Weekender? 9820 2014-03-09 11:03:53 Alvin P. Schmitt 1 Poles and Zeros 9808 2014-03-06 13:43:50 David Nushardt 1 EMRFD circuit boards 9806 2014-03-06 12:04:59 kg9dk_john 8 Storing small parts 9805 2014-03-06 10:47:02 Ashhar Farhan 21 diode mixer termination and degradation 9802 2014-03-06 04:37:48 Thomas S. Knutsen 3 Re: Soldering SMD, was: Collecting and Storing SMD Parts 9795 2014-03-04 19:14:23 bob_ledoux 7 Collecting and Storing SMD Parts 9794 2014-03-03 10:07:23 ford@highmarks.co... 3 Impedance question fig 6.56 9791 2014-02-25 20:44:10 bob_ledoux 3 Low Noise Amps for Tayloe Integrating Detector 9790 2014-02-25 00:52:28 Stewart Bryant 1 OT: ARRL Circuit Simulation and Analysis 9778 2014-02-23 03:34:22 Ashhar Farhan 8 An RC-coupled Linear Amp 9774 2014-02-22 06:07:29 Jim Miller 3 Pic power meter for 630m band use? 9771 2014-02-18 22:00:29 rftdugan 7 EMRFD 2.11 power amplifier 9768 2014-02-17 18:24:35 Jim Miller 3 Squarer for Class E 9756 2014-02-15 16:47:11 Mark Meyer 13 RD16HHF1 FET amp 9753 2014-02-15 10:35:36 Biastee 2 Re: Digest Number 2082 9751 2014-02-15 07:20:15 Jim Miller 2 Class E 475Khz 100w amp [was IRF510 Successor? ] 9740 2014-02-14 08:09:17 Jim Miller 8 IRF510 Successor? 9732 2014-02-13 19:36:16 Ashhar Farhan 10 air core toroids 9729 2014-02-13 11:38:45 daven9ooq 3 Proper dress of male SMA on RG316 coax 9726 2014-02-12 11:11:32 Ephemeral 1 Measuring noise figure (was Investigating a Norton feedback amplifie 9716 2014-02-11 16:32:41 Ephemeral 13 Investigating a Norton feedback amplifier for battery operation 9706 2014-02-10 12:36:51 Jim Miller 11 Diode ring mixer question 9702 2014-02-09 17:56:10 Richard Johnson 4 Noise generator 9691 2014-02-03 06:09:15 miaidea2001 6 455Khz filter adapting 9685 2014-01-24 18:49:40 wb2fyz 3 July-August 2012 QEX Article 9681 2014-01-23 17:40:03 Jerry Haigwood 4 Hybrid Cascode IF amplifier 9676 2014-01-21 14:41:24 Glen Leinweber 6 WBR Regen antenna coupling 9672 2014-01-21 01:56:22 Ashhar Farhan 1 A wiki for homebrewing 9666 2014-01-20 03:56:36 Ashhar Farhan 11 ssb out of the raspberry pi 9660 2014-01-17 20:22:45 Ashhar Farhan 9 The Minima transceiver 9659 2014-01-17 13:01:26 Phil Sittner 7 SA612 spice model 9653 2014-01-14 23:58:18 Ashhar Farhan 5 trifilar wound smd transformers 9650 2014-01-14 12:52:07 Kihwal Lee 3 microT2 documentation 9649 2014-01-10 14:40:29 Gary, WB9JPS 1 LTSpice for the Mac! 9647 2014-01-09 16:30:35 boblarkin02 2 TRansmission lines in Radio Designer 9646 2014-01-07 18:45:41 bob_ledoux 1 Where to Ask Questions about Norcal 2030 9640 2014-01-06 19:43:17 Ashhar Farhan 6 electrical steppir 9629 2014-01-01 18:03:40 artus1947 8 Measurement Receiver 9618 2013-12-30 05:48:37 g6ybc 8 Help Is there a Digi Copy Of this Great Book 9615 2013-12-29 18:28:27 Clutter 1 Re: How to store parts? Addendum 9613 2013-12-29 16:44:09 eric_ke6us 1 RF Power Meter 9612 2013-12-29 15:15:24 richj_focus 9 How to store parts? 9611 2013-12-27 20:17:22 Ashhar Farhan 1 homebrewed apps for rigol 9607 2013-12-25 10:53:52 it9ayd 1 to all of you 9604 2013-12-24 13:04:58 Alan Jones 1 FW: [emrfd] Re: schematic drawing software 9585 2013-12-23 20:48:53 Ashhar Farhan 27 schematic drawing software 9584 2013-12-23 18:58:39 ka7exm 1 Happy Holidays and Group Photo 9579 2013-12-21 13:53:41 bob_ledoux 4 Success: Clean, Simple Local Oscillator 9568 2013-12-20 09:25:43 bob_ledoux 12 Questions Re: Strange Local Oscillator Wave Forms 9563 2013-12-16 12:20:49 David LeVan 4 Oldbooks 9562 2013-12-16 12:19:31 artus1947 2 GPLA problems 9561 2013-12-16 12:18:58 Jack Generaux 1 Ladpac 9542 2013-12-06 14:34:29 Mike 3 wanted to buy: one microR2 PC board 9526 2013-12-05 06:25:58 mm0gyx 8 SMT np0 capacitors 9511 2013-12-04 12:45:58 peepholenz 26 Capacitance vs frequency 9504 2013-12-04 08:10:12 ford@highmarks.co... 7 Simulation 9502 2013-12-04 02:05:24 Richard Patten 2 5B4AGN TXBPF 9500 2013-12-03 17:46:50 Jim Miller 8 Interesting Linear tech switcher 9484 2013-12-02 17:00:11 Ashhar Farhan 13 Recommendations for a headphone amplifier 9482 2013-12-02 16:46:56 Phil Sittner 1 test 9469 2013-12-02 05:31:43 James Duffey 12 Surfce mount J310s and Replacement of U310 with J310 9468 2013-12-01 21:37:58 iq_rx 12 Common Gate Amplifiers -- Long Post 9467 2013-12-01 17:41:01 mm0gyx 2 602 oscillator 9452 2013-11-29 17:49:59 rcbuckiii 14 Grounded gate amplifier impedance 9443 2013-11-28 09:51:56 Glen Leinweber 2 Re: An Incidental NE602 Discovery by bkopski 9427 2013-11-26 12:43:36 richj_focus 2 KK7P DSPx daughter card 9423 2013-11-26 09:46:16 johnjdignan 4 Can any body help me with a Varactor Circuit? 9419 2013-11-25 18:54:20 Phil Sittner 25 NE602--Antenna analyzer 9414 2013-11-25 14:25:46 stever1k 6 Not getting Messages 9408 2013-11-24 13:07:32 bkopski 6 An Incidental NE602 Discovery 9404 2013-11-23 06:14:29 wa5bdu 4 K3NHI calibrator for AD8307 power meter 9403 2013-11-22 09:18:46 wb9kzy 1 QEX article on automated crystal testing 9393 2013-11-19 20:10:34 noodll15 2 binocular core winding 9390 2013-11-19 11:13:20 mm0gyx 10 About fundamental xtals 9356 2013-11-12 14:47:24 Jim 34 New QEX arrived in the mail today 9340 2013-11-11 17:39:27 Jerry Haigwood 15 Thin Film SMD Resistors 9307 2013-11-04 17:32:48 rcbuckiii 24 DBL diode mixer LO level 9297 2013-10-30 10:03:40 Richard Hayter 1 Test message received 9288 2013-10-23 01:37:31 Ashhar Farhan 2 Laser EME, at 600mbps! 9282 2013-10-22 07:40:28 ka7exm 1 Regading books and downloads 9279 2013-10-21 18:17:07 patt896 1 Super J-Pole @ 126 MHz 9270 2013-10-19 21:06:06 k6jq 28 Unbuffered vs buffered CMOS inverters, with a twist 9259 2013-10-17 20:58:06 prysm678 6 alternate for Zverev filter book? 9257 2013-10-15 21:27:03 Andy 3 Re: posting text 9253 2013-10-15 07:37:43 Ashhar Farhan 2 Fm transmitter for a repeater 9239 2013-10-12 15:05:33 Kerry 6 Return-Loss Bridge Operation 9236 2013-10-11 15:58:23 Giancarlo Moda 4 A strange New I-Q Mixer Invention 9227 2013-10-08 18:53:09 bob_ledoux 6 Using 74HC04 as VFO 9219 2013-10-06 07:23:09 Chris Howard w0ep 9 questions about a DDS spectrum 9206 2013-10-04 12:26:34 dnorbury 13 SN74121 Monostable multivibrator circuits 9205 2013-10-03 20:24:29 prysm678 3 w7zoi Spectrum Analyzer specific questions 9204 2013-10-03 20:21:36 rcbuckiii 6 Colpitts VFO 9201 2013-10-03 17:26:28 peepholenz 3 Old QST 9198 2013-10-02 10:20:55 prysm678 4 ad603aq questions 9197 2013-09-30 14:38:13 Alberto I2PHD 1 W&G PS-19 9196 2013-09-29 16:28:04 mosaicmerc 1 Precision Ref Freq. 9174 2013-09-27 09:06:36 Ford Peterson 21 Vector Network Analyzer 9171 2013-09-23 07:21:11 Ken Evans 2 Best of Idea Exchange now available 9166 2013-09-20 18:50:40 Jerry Haigwood 2 Need a MMIC 9152 2013-09-18 11:32:01 Ashhar Farhan 5 W2NSD SK 9149 2013-09-17 14:54:57 kerrypwr 16 Calibrating RF Power Meters With DC 9144 2013-09-15 09:58:37 ter753 1 kanga us 9141 2013-09-15 06:08:17 Bill Kelsey - N8E... 7 Kanga uS 9140 2013-09-14 17:19:16 patt896 1 Kanga US from eHam.net 9134 2013-09-13 20:55:11 Jerry Haigwood 4 The Simple Scalar Network Analyzer (LONG) 9107 2013-09-09 21:24:53 patt896 22 VHF Dipole Feedpoint Impedance Match Options @126.0 MHz 9104 2013-09-09 13:25:42 Ashhar Farhan 9 star topology in radios 9088 2013-09-07 10:43:22 n1vwd 8 Charging a super polymer lithium-ion battery 9079 2013-09-06 09:00:54 n1vwd 17 yahoo groups picture 9078 2013-09-06 05:39:56 n1vwd 1 correction group moderator 9073 2013-09-05 06:51:25 n1vwd 1 Group Moderator 9066 2013-09-04 07:37:41 Ashhar Farhan 1 musings about Chris' Mixer Musings 9062 2013-09-02 19:32:54 Rick KK7B 3 Binaural experiments--long post 9046 2013-08-30 19:45:42 Peter Parker 10 Binaural receiver listening - experiences 9015 2013-08-27 18:24:52 AD7ZU 33 AGC questions 9012 2013-08-27 12:34:41 Ashhar 3 A Phase Modulator that doesn't work 9007 2013-08-22 21:52:43 Roger Hayward 11 The changing look of the EMRFD group 9001 2013-08-21 14:56:43 Peter Parker 6 Wideband RF phase shift circuit 8982 2013-08-19 03:37:10 Ashhar Farhan 22 KISS mixer with 2N7000 8968 2013-08-16 07:15:37 Peter Parker 11 Video of simple SSB phasing receiver 8955 2013-08-14 05:13:04 Ashhar Farhan 5 war skies and dipoles 8951 2013-08-12 17:27:37 Joe 13 Re: LCR Meter (Steber LMS) 8936 2013-08-10 10:43:04 ac2gl 15 LCR Meter 8920 2013-08-08 14:35:27 Wes 2 More on crystal Qu Measurement 8906 2013-08-07 16:36:06 Ashhar Farhan 19 ot : about rigol 1052E 8896 2013-08-05 11:52:10 ve7cqy 5 Motorola Microphone cartridge 8895 2013-08-05 09:55:25 Bob L 15 Software for the Novice Crystal Filter Designer 8886 2013-08-02 11:13:53 Gustavo Villada 2 book: differences between book's version 8875 2013-08-01 11:01:40 augustinetez 3 Characterizing Temperature Drift of Oscillators 8874 2013-08-01 11:00:18 Bob L 2 Is This A Method to Achieve Proper Crystal Filter Terminations? 8859 2013-07-30 20:04:06 Bob L 29 Crystal Selection for 20 Meter Filter 8856 2013-07-30 09:41:59 Bob L 13 Sourcing Variable Capacitors and Reduction Drives 8841 2013-07-28 16:19:07 Bob L 13 DC Phasing Rigs and SMT Devices 8831 2013-07-28 05:02:29 Chris Howard w0ep 2 impedance matching in audio circuit 8827 2013-07-27 15:12:27 Phil Sittner 4 Original "R2" receiver board 8818 2013-07-25 21:33:49 Bob L 20 Receiver Project Choice: Superhet or DC? 8812 2013-07-13 23:44:37 Mark Schoonover 4 Another Approach to DIY PCBs - PCB Press 8807 2013-07-13 17:35:37 101 7 Common Mode Current on DC line? 8782 2013-07-05 11:03:25 Chris Trask 6 Active Monopole Antenna Amplifier 8781 2013-07-05 08:04:11 KK7B 1 222.1 System for sale 8778 2013-07-04 19:06:29 101 20 Inductive reactance of a Current Balun? 8777 2013-07-04 12:59:44 KK7B 1 Sleeping Bag Radio for sale 8768 2013-06-27 14:39:30 ken evans 1 QRP ARCI New Publication 8766 2013-06-27 14:25:27 Paolo Mattiolo 3 Minimal SWR Indicator 8765 2013-06-27 11:23:09 Brooke Clarke 1 Active Whips vs. Long Wire Antennas 8761 2013-06-27 08:24:23 mdgolfbum 10 Active antenna amplifier 8759 2013-06-26 15:27:29 Jim Miller 2 View distortion in LTSpice? 8757 2013-06-25 20:13:48 n5emqrp 2 Field Day Filters 8752 2013-06-21 20:47:47 Jim Miller 5 BF991 discontinued? 8740 2013-06-17 12:38:54 Paul Anderson 1 Wandel & Goltermann SPM-15 Selective Level Meter Manual 8739 2013-06-17 05:49:24 Jim Miller 3 7Mhz xtal? 8730 2013-06-13 21:28:13 Dave Miller 11 Microstrip to board edge desgin rule 8724 2013-06-13 07:15:09 Steven 4 POWER 8720 2013-06-11 10:47:37 bquijalvo 4 Getting an SA602AN to oscillate 8717 2013-06-10 10:28:41 Alan Ibbetson 1 LF spurs using Sortabalun as PA output transformer 8711 2013-06-07 22:38:33 n5emqrp 3 W7ZOI Spectrum Analyzer - 100 mhz Crystal 8709 2013-06-07 05:28:15 ha5rxz 3 Question About T2 Transmitter 8700 2013-05-29 19:41:45 Henry 1 Air Variable Capicators for sale 8687 2013-05-24 20:41:40 AD7ZU 14 precision parts 8669 2013-05-21 19:05:48 Steven 24 HELP 8665 2013-05-20 07:16:25 Gian 1 NOT EMRF - Schematic DX Engineering NCC1 8656 2013-05-15 20:25:41 Henry 1 Slide rules for sale 8655 2013-05-15 20:25:32 mm0gyx 1 Varicap control of 602/386 DC Receiver 8651 2013-05-14 10:15:59 Gian 2 KENWOOD TS-990 HAS INTEGRATED THE H-MODE MIXER AS 1ST MIXER 8647 2013-05-12 18:48:38 r.ewton@att.net 4 old step attenuator 8636 2013-05-07 05:10:10 VU3AUZ 4 FT950 to Furuno Amplifier Interface 8633 2013-05-06 21:24:21 Lawrence 2 Signal to Noise Calculation of a Receiver Cascade 8630 2013-05-06 09:45:30 wb9kzy 7 diplexer frequency for an upconverter 8623 2013-05-03 03:30:03 Donald Kelly 10 Re: How Much L.O. Power Is Needed - OXNER APP NOTE 8607 2013-05-01 21:43:18 Bob L 7 Question about Capacitors in Phase Circuits 8604 2013-05-01 02:43:17 101 19 How Much L.O. Power Is Needed? 8603 2013-04-26 13:28:22 gi0gdp 1 Cohn Filters 8601 2013-04-25 16:31:18 Don Wines 1 Re: Free Parts to a Good Home *All Gone* 8595 2013-04-24 09:12:07 Don Wines 1 Re: Parts Free to a Good Home *Update* 8594 2013-04-24 07:47:07 Jim Stafford 1 Only 21 days til the 18th FDIM 8587 2013-04-23 15:37:49 Don Wines 1 Parts - Free to a Good Home 8581 2013-04-23 05:57:02 ken evans 1 FDIM Rooms 8572 2013-04-22 03:22:47 Stephen Farthing 1 LPF Relays 8571 2013-04-21 20:38:20 Jerry Haigwood 24 RLB from the book 8569 2013-04-20 20:56:02 Henry 1 Equipment for sale 8568 2013-04-20 20:55:51 Henry 1 Static control pad for sale 8562 2013-04-18 10:16:20 Bob 3 A Simple Sweep Generator 8559 2013-04-17 16:59:32 Jerry Haigwood 1 My 50 ohm feed thru 8557 2013-04-16 19:20:26 Jerry Haigwood 2 The Measurement Receiver in the Power Meter Article 8536 2013-04-15 01:55:41 Stephen Farthing 12 Where can I get a copy of.... 8532 2013-04-13 21:06:02 Jerry Haigwood 3 My AADE DFD4 Frequency Counter 8511 2013-04-11 22:09:06 yz1gw 10 Design tracking PLL, help 8505 2013-04-11 19:48:54 101 26 Device to read a resonant frequency directly & accurately? 8501 2013-04-10 22:22:30 Bob L 11 DSP Experimentation Question 8499 2013-04-10 09:08:12 Jerry Haigwood 2 My Power Meter 8496 2013-04-09 04:59:26 gi0gdp 1 50 ohm line 8486 2013-04-08 18:37:22 Jerry Haigwood 12 50 ohm stripline 8451 2013-04-02 02:26:01 Stephen Farthing 4 Measuring power supply noise. 8448 2013-04-01 19:34:27 Jerry Haigwood 28 Spectrum Analyzer 8433 2013-03-31 18:16:13 Dana Myers 3 Simple local-oscillator for diode mixer - comments? 8432 2013-03-31 18:16:13 Ronald RiemVis 13 Programmable Attenuator 8423 2013-03-28 14:34:43 ha5rxz 8 Shielding Data Connections In RF Modules 8422 2013-03-28 07:49:13 Craig Smith 1 Re: For Sale: 0.1 inch header stock - price reduced 8421 2013-03-26 10:47:59 Craig Smith 1 For Sale: Switches and Header Stock 8418 2013-03-24 17:33:09 Jerry Haigwood 2 HP8640B Manual 8417 2013-03-23 22:09:39 Steven Read 1 Fwd: [emrfd] Re: Copper Tape 8396 2013-03-23 09:27:09 Jerry Haigwood 18 Copper Tape 8386 2013-03-22 18:24:03 Craig Smith 2 For Sale: Trim pots for PCB 8373 2013-03-19 21:51:56 andrew_vk6wax 2 Feedthrough capacitor values 1nF (0.001uF) versus 5nF (0.005uF) 8369 2013-03-19 21:51:55 lmeeny 6 7 MHz RF amplifier EMFRD Chapter 8 Figure 8.22 8364 2013-03-19 13:19:48 Bob 8 NE602 Conversion Gain Experiment 8356 2013-03-17 19:21:34 Jerry Haigwood 30 I new a generator 8355 2013-03-17 14:07:39 Jerry Haigwood 2 HP 8601A sweeper/generator 8346 2013-03-16 16:33:44 Jerry Haigwood 7 W7ZOI/W7PUA Wattmeter current 8336 2013-03-14 18:22:49 Jerry Haigwood 12 W7ZOI & W7PUA Wattmeter Calibration 8335 2013-03-13 06:37:31 ken evans 1 Bill Kelsey Updates 8333 2013-03-12 11:27:54 Romi 1 RF power switching circuits question 8331 2013-03-11 12:12:33 Jerry Haigwood 3 W7ZOI's wattmeter 8327 2013-03-10 04:19:51 Stephen Farthing 1 Re Bill Kelsey Kanga USA 8324 2013-03-10 00:10:01 iami78 3 Twisted wire quadrature splitter, driving differentially (0+180 degr 8322 2013-03-09 10:07:49 ken evans 5 Bill Kelsey - Kanga US 8313 2013-03-06 06:41:53 agustintomasferra... 4 Siglent DSG 1025 as RF generator 8311 2013-03-04 06:50:33 Henry 1 Book Sale 8307 2013-03-01 10:08:30 Ashhar Farhan 3 current commutating mixer's termination senstivity 8304 2013-02-28 02:37:50 Alberto I2PHD 3 Need advice for interfacing an ADC 8301 2013-02-25 14:22:09 Vern 2 Kanga us 8285 2013-02-22 22:01:15 101 1 Impedance Matching Transformer VS. Variable Capacitor 8284 2013-02-22 21:54:56 agustintomasferra... 15 NE602 - Calculating input bandpass filter 8283 2013-02-22 16:13:28 Glen Leinweber 3 A no-bias LC oscillator 8278 2013-02-21 13:53:52 oldengineer11 5 50 MHz RF Generator 8268 2013-02-18 20:20:53 Jerry Wolczanski 10 KK7B MicroR2 problem 8257 2013-02-12 12:01:31 Wes 2 Double Tuned Circuit Thoughts 8254 2013-02-12 07:20:24 101 8 Signal Generator as a Local Oscillator? 8245 2013-02-10 09:06:12 Dana Myers 3 Modifying Hycas-IF-Amp board for dual-gate MOSFETs 8242 2013-02-09 07:56:48 kg9dk_john 13 is there an advanage to using solder with rosin flux or water solubl 8237 2013-02-07 17:18:36 Nick Kennedy 5 Series & parallel mode crystal oscillators 8234 2013-02-06 12:45:14 Craig Smith 2 Re: For Sale: Powdered Iron Core Assortment 8229 2013-02-05 21:17:14 kb9fko 2 ills of DC receivers 8228 2013-02-05 07:01:22 Craig Smith 1 For Sale: Ferrite core collection 8227 2013-02-04 15:51:57 Craig Smith 1 Re: For Sale Ferrite Core Collection 8226 2013-02-04 07:03:55 Bob 1 New Double Tuned Filter Measurements 8225 2013-02-03 13:40:24 Markus Hansen 1 Re: Digest Number 1775 8210 2013-02-02 08:20:47 Bob 2 More DTC data - ref. post 8183 8193 2013-02-01 15:23:46 Jerry Haigwood 28 Cutting Copper Clad Board 8187 2013-01-31 20:08:49 pgmrdan 3 Introduction. 8182 2013-01-31 05:51:03 Tim BandTech.com 1 Residual FM spec of a Wavetek 1801A sweep oscillator 8174 2013-01-30 10:48:21 Nick Tsakonas 16 RF measurements guidelines 8173 2013-01-28 07:59:52 Craig Smith 1 ProtoBoard and PCB Construction package 8172 2013-01-27 19:58:30 Craig Smith 1 For Sale ProtoBoard and PCB Construction Package 8171 2013-01-27 19:58:08 Henry 1 Magnet wire for sale 8150 2013-01-22 13:55:56 Stephen Farthing 20 component values in EMRFD schematics? 8143 2013-01-20 21:53:54 victor 1 Re: phasing exciter for transmitter 8139 2013-01-20 11:56:50 Pat Bunn 1 Re: [emrfd] phasing exciter for transmitter 8132 2013-01-20 08:21:46 Ravi Miranda 6 BFR91 equivalent 8131 2013-01-20 08:12:28 David Feldman 2 Need help identifying this semi-rigid UT141-type coax 8113 2013-01-17 20:42:40 Ashhar Farhan 25 Understanding Amateur Radio 8101 2013-01-14 11:42:34 George 14 Question about 4CX250Rs 8089 2013-01-12 14:47:49 Ashhar Farhan 5 vhf power chain 8088 2013-01-12 14:47:38 James H 8 attenuator to use with clock oscillator? 8087 2013-01-09 17:30:14 thomas 1 Diplexer filters for amplifiers 8085 2013-01-09 06:33:37 lmeeny 2 EMRFD Revised First Edition - 8.5, RF Low-Noise Amplifier 8080 2013-01-08 20:29:40 Kerry 4 Transformer For Norton Amplifier 8067 2013-01-07 18:45:06 RichardV 10 NE602 Failure 8065 2013-01-07 10:16:19 Salvo 1 Hi all 8047 2013-01-06 06:28:10 101 16 Bandpass Diplexer 8045 2013-01-05 18:29:17 Jerry Haigwood 9 Winding a Balun Core for use with a diode ring mixer 8037 2013-01-05 12:29:02 Henry 1 After Christmas Book Sale 8033 2013-01-05 07:10:35 jor 3 Torroid question for L-C tuner 8025 2013-01-03 23:01:48 Ashhar Farhan 1 phase noise and mixer measurements by nick. 8014 2013-01-02 06:24:35 Nick F 9 Phase Noise measurements on BITX VFO and other oscillators 8011 2012-12-30 18:50:10 davidpnewkirk 2 70 years ago in amateur radio frequency control 8004 2012-12-29 06:44:49 Nick Tsakonas 26 DDS module with buffer / amp 8001 2012-12-28 08:29:33 Nick F 3 Double balanced RF Mixers - 1dB compression point 7989 2012-12-26 17:52:55 Nick F 7 Measurements on double balanced mixers 7984 2012-12-25 13:59:01 Alberto I2PHD 8 Spice and PSpice 7980 2012-12-24 19:42:21 Tim 8 Directional Coupler Construction 7977 2012-12-24 08:28:44 davidpnewkirk 5 A regenerative detector at IF behind a diode-ring doubly balanced mi 7970 2012-12-20 19:52:27 Ravi Miranda 6 Soldering station 7960 2012-12-05 06:26:07 jor 5 LC antenna tuner coil question 7958 2012-12-04 23:35:28 Paul Anderson 2 HP 1743A Scope Schematic 7956 2012-12-04 21:47:04 Ravi Miranda 3 EMRFD Book Availability - UK 7937 2012-11-22 23:56:49 Vojtech 17 two questions on HF transformers 7935 2012-11-21 03:16:16 geoffrey pike 1 Re: Digest Number 1724 7931 2012-11-20 06:36:06 George 5 Source for quartz crystals 7925 2012-11-13 03:53:52 pauldebono@rocket... 6 an accurate L meter 7920 2012-11-07 22:15:11 jor 3 Re, Question; can the LD MOS Fet PD85004 be used for a HF PA 7919 2012-11-07 14:08:16 pwrpalm 1 For Sale - Instek SFG-2110 Function Generator 7913 2012-11-05 18:32:52 jor 6 Question; can the LD MOS Fet PD85004 be used for a HF PA am 7909 2012-10-27 05:01:51 ha5rxz 4 Phase Modulating A Carrier 7908 2012-10-24 11:23:21 pwrpalm 1 For Sale: Instek SFG-2110 Function Generator - mint condition - Pri 7897 2012-10-21 18:21:01 Steve 5 Diode 1N913 7892 2012-10-21 14:06:57 Bill Meara 2 Disk broke Need fba 7887 2012-10-21 07:38:28 peepholenz 7 Fuses.. 7882 2012-10-20 20:12:29 Ray 11 Shielded enclosure effectiveness 7879 2012-10-17 10:28:24 Craig Smith 1 For Sale: GW Instek SFG-2110 Function Generator - mint condition 7878 2012-10-17 10:28:23 pwrpalm 2 For Sale: Agilent 34405A DVM - Mint condition 7877 2012-10-17 10:27:50 tx_timbertoes 1 just joined 7876 2012-10-17 07:07:42 pwrpalm 1 For Sale - Agilent 34405A DVM - mint condition 7875 2012-10-17 06:37:56 pwrpalm 1 For Sale: Instek SFG-2110 Function Generator - mint condition 7871 2012-10-15 03:05:24 g3zoh 1 Apologies for Spam 7870 2012-10-15 02:38:19 ha5rxz 4 Missing Value in EMRFD Schematic 7869 2012-10-14 21:46:58 GEORGE BRIAN 1 Fwd: I DID IT! 7856 2012-10-12 11:51:08 Nick Tsakonas 20 Some advice on used HP instrument. 7847 2012-10-10 23:55:59 Tamás Fábián 9 Series resonant color burst crystals 7828 2012-10-05 06:00:07 g3xaq 18 Output transformer for single ended PA 7827 2012-10-03 07:08:34 lasse moell 1 Needed signal source 7826 2012-10-02 06:30:26 Bill Kelsey - N8E... 1 Special Book Offer 7822 2012-09-29 14:35:49 Chris Trask 3 Active Loop Antenna Circuitry 7817 2012-09-28 08:41:44 Bill Kelsey - N8E... 2 Re: QRP-L Digest, Vol 101, Issue 36 7816 2012-09-28 02:10:49 geoffrey pike 1 MC1496 7813 2012-09-25 07:18:49 ha5rxz 3 SSB Generation - Opinions Please 7809 2012-09-22 20:31:15 g0kla 6 T2 Audio response not flat 7806 2012-09-22 08:50:57 Weddig, Henning-C... 2 AW: [emrfd] Mixer Termination w/Balanced Amp 7805 2012-09-21 19:51:59 jwharding3 1 Mixer Termination w/Balanced Amp 7803 2012-09-21 19:51:47 gareth evans 1 CA3028A availability 7802 2012-09-21 19:51:39 jwharding3 2 FET Balanced Amp Mixer Termination 7794 2012-09-20 20:20:46 nm0s_qrp 6 Proposed new digital mode 7788 2012-09-17 11:42:15 ha5rxz 2 A Sudden Thought About The HYCAS Project 7786 2012-09-14 15:28:52 Bill Carver 1 Re[4]: [emrfd] UR3IQO and the Chris' KISS mixer 7784 2012-09-14 13:04:24 Bill Carver 2 Re[2]: [emrfd] UR3IQO and the Chris' KISS mixer 7779 2012-09-14 05:39:16 Ashhar Farhan 5 UR3IQO and the Chris' KISS mixer 7775 2012-09-13 14:16:19 pauldebono@rocket... 10 SMD jig 7764 2012-09-10 09:40:10 Ashhar Farhan 8 tektronix 465M vs Rigol 7763 2012-09-10 06:37:01 Henry 1 Antenna Tunner for sale 7760 2012-09-09 14:47:45 pauldebono@rocket... 2 Tayloe mixer 7751 2012-09-07 21:43:07 KK7B 11 On the concept of absolute correctness... 7746 2012-09-05 15:40:30 Bill Carver 1 Re[2]: Re[2]: [emrfd] A few questions on filters from chap 3 7741 2012-09-04 20:41:52 kb1uys 3 EMRFD "First Transmitter" Schematic Discrepancy 7740 2012-09-04 16:58:52 Bill Carver 5 Re[2]: [emrfd] A few questions on filters from chap 3 7736 2012-09-03 23:33:59 Ashhar Farhan 3 A few questions on filters from chap 3 7697 2012-08-29 08:12:19 nm0s_qrp 35 Survival of Ancient ICs 7695 2012-08-27 21:53:01 Garry 11 Hycas behaviour 7692 2012-08-27 10:59:47 Henry 2 Fuse needed 7691 2012-08-27 10:59:36 Reginald Beardsle... 2 Elonics E4000 docs 7689 2012-08-25 09:09:29 Henry 2 RF linear sweep generator kit for sale 7683 2012-08-19 10:09:22 Ashhar Farhan 6 brass permeability at vhf 7670 2012-08-11 16:38:55 Reginald Beardsle... 13 Flux residue deemed harmful 7665 2012-08-06 20:16:08 Russ Ramirez 1 Re: Bifilar feed choke... 7663 2012-08-05 20:45:08 rlramirez77 1 Understanding the IP3 specification and linearity, part II 7660 2012-08-05 00:38:22 drmail377 1 Two New DDS Chips from ADI, AD9914 & AD9915 7654 2012-08-02 08:36:48 Glen 10 Fet Noise specs 7650 2012-08-01 08:42:53 Tim BandTech.com 3 noise figure for small signal rf amp: bf998 mosfet versus IF140 jfet 7649 2012-08-01 07:27:31 wa9cgz 3 DBM max audio drive 7642 2012-07-27 18:26:06 rlramirez77 1 Understanding the IP3 specification and linearity 7640 2012-07-27 15:18:15 dnorbury 6 Audio noise limiter 7634 2012-07-24 11:55:05 Ashhar Farhan 2 measuring IMD 7628 2012-07-23 16:08:40 wheverly1@verizon... 5 Transistor substitute 7620 2012-07-17 16:06:27 Thomas S. Knutsen 5 VHF Impedance tuner. 7593 2012-07-14 08:32:16 Reginald Beardsle... 3 Identifying BJT leads w/ an ohmmeter 7592 2012-07-14 08:31:49 Reginald Beardsle... 19 Broadband RF design 7578 2012-07-12 12:57:20 Paul Anderson 16 Substitution for 7400? 7577 2012-07-12 07:01:59 Reginald Beardsle... 12 Low cost, software defined, spectrum analyzer? 7571 2012-07-10 15:03:39 g3wie 6 Mixed form bandpass filter with different impedances 7570 2012-07-10 07:01:26 Guy 2 FS: RFToolKit kits, HYCAS IF AMP Kitlet [un-built] 7556 2012-07-02 11:28:19 Ashhar Farhan 13 nano vacum tubes? 7553 2012-06-28 07:20:31 alan7114p 5 Hal-tronix Frequency Counter Schematic 7550 2012-06-24 10:32:29 ka3j12 3 BD139-6 versus BD139-16 7539 2012-06-19 17:17:32 Phil Sittner 11 Vector voltmeter useage 7538 2012-06-19 09:35:05 4z4rb 1 FS: 25 ohm silver plated coax 7534 2012-06-17 08:37:28 st2nh 1 My breadboard Butler oscillator. 7524 2012-06-05 11:19:37 ha5rxz 12 Minicircuits Bulk Buy 7522 2012-06-04 13:13:10 sp2qca 2 comparing R2pro with PHASING RECEIVER WITH TAYLOE FRONT END 7512 2012-05-27 06:43:11 Ashhar Farhan 9 electronics workshop : crystal set reprise 7511 2012-05-26 20:57:31 kb9fko 2 T/R switching with straight keys with NO and NC contacts? 7504 2012-05-13 13:07:26 Robert Bennett 7 Unity Gain Bandwidth 7501 2012-05-11 12:06:02 Michael Dunn 1 Share a scope or electronics story, get a thank you gift 7495 2012-05-09 15:27:29 kc8sbv 7 Audio Filtering 7493 2012-05-09 08:01:57 Edson 2 High Isolation RF Preamp 7482 2012-05-08 06:05:33 Ashhar Farhan 12 disposing of the etchant 7481 2012-05-05 09:45:15 Bill Kelsey - N8E... 1 Special Pricing on books at Dayton/FDIM - Final offer! 7472 2012-04-30 21:33:56 newdendrite 1 Phase noise in VXO's 7463 2012-04-30 08:04:18 dnorbury 8 Underground wire detector 7462 2012-04-30 01:28:09 Ronald RiemVis 1 General question about VSWR and power control 7438 2012-04-25 13:57:33 Jim Stafford 1 Four Days In May - QRP at Hamvention 7433 2012-04-25 03:21:44 Ashhar Farhan 37 A pic dds with a pll cleanup 7429 2012-04-22 13:27:11 Bill Kelsey - N8E... 1 Dayton Special 7427 2012-04-17 19:51:31 AD7ZU 1 ARRL CCR / HOA Study 7406 2012-04-13 23:30:22 Vincenzo Calandra 3 Roy RX 7392 2012-04-02 07:00:45 lb3hc 14 RF voltage detector design? 7391 2012-04-01 08:25:23 Stephen Farthing 1 Re Equations 7382 2012-03-30 17:28:42 Craig Smith 1 FS: HP 1141A Differential Probe System 7377 2012-03-30 09:48:47 Stephen Farthing 13 Equations....... 7375 2012-03-29 07:23:23 pwrpalm 1 FS: HP 1141A/1142A FET Differential Probe and Control/Power Module 7373 2012-03-29 01:54:46 ha5rxz 3 Filter Crystals - A Quick Question 7367 2012-03-23 17:27:10 K9SUL 6 HYCAS IF amp for 50KHz IF 7363 2012-03-22 13:42:12 Ross Tucker 4 Anybody willing to mail me a pair of BN43-202? 7343 2012-03-18 04:05:28 Ashhar Farhan 20 feed through capacitor sources 7334 2012-03-12 20:31:03 ka7exm 3 Hybrid Cascode Amplifier Kitlets, EOL 7323 2012-03-11 01:07:58 ha5rxz 2 An Interesting Method Of Tuning Bandpass Filters 7321 2012-03-10 09:34:58 Henry 1 FS Bird Wattmeter 7317 2012-03-10 07:08:25 va3vfo 20 HB Filter for 6 KHz 7307 2012-03-03 07:10:38 Ashhar Farhan 2 fresh meat!! 7306 2012-03-02 17:05:35 Henry 1 FS Realistic scanning receiver 7303 2012-02-29 07:14:41 jwharding3 2 Mixer Termination 7300 2012-02-28 01:37:14 Ashhar Farhan 4 hybrid twisted pair following the switching mixer 7277 2012-02-20 17:54:51 Donald Kelly 1 Re: 2SC1307, 2SC1969 - Thanks Jim! 7275 2012-02-20 13:44:34 Donald 29 2SC1307, 2SC1969 7259 2012-02-16 22:30:04 Kerry 14 Signal Hound 7256 2012-02-16 10:57:27 g3wie 1 Simple PIN diode attenuator 7255 2012-02-16 05:02:37 ALAN MELIA 1 re VCO 7254 2012-02-15 19:28:42 Daniel Mendes 2 VCO question 7251 2012-02-14 08:25:44 Tom 4 subway construction 7245 2012-02-13 08:04:30 Ben Pharr 3 Converting VFO circuit to VCO 7242 2012-02-12 21:56:01 Ashhar Farhan 4 to cool device 7241 2012-02-12 21:54:08 Ashhar Farhan 4 the kiss mixer, some more questions 7238 2012-02-11 21:32:14 Henry 11 Books for sale 7233 2012-02-10 08:24:11 Jim Miller 5 Tapping a tank? 7225 2012-02-03 10:04:44 Ben Pharr 10 Simple BPF for DC Receiver 7224 2012-02-02 19:50:10 Ashhar Farhan 2 Input/Output tuned amplifier 7219 2012-01-30 16:52:34 Justin Pinnix 2 17.034mhz crystals 7203 2012-01-28 14:24:50 g3wie 5 Ultra-spherical lpf - sums don't seem to work out 7202 2012-01-28 07:04:58 Tim 1 160M QRP NAQCC sprint and 160M QRP homebrew 7200 2012-01-25 13:14:34 clynton yarter 3 Learning the emrfd and Thge Art of electronics way 7193 2012-01-24 06:52:50 Alan Melia 2 re KISS mixer ?? 7191 2012-01-24 04:51:35 ha5rxz 2 High Voltage Probe 7188 2012-01-23 05:34:40 Chris Trask 20 KISS Mixer Update 7187 2012-01-19 07:56:58 Henry 1 FS Bird model 43 wattmeter 7186 2012-01-19 07:53:55 Henry 1 Panel meters for sale 7175 2012-01-16 04:30:23 Alan Melia 1 re RXTX switch trouble 7170 2012-01-15 09:02:48 Vincenzo Calandra 10 RTX switch trouble 7167 2012-01-14 13:28:30 Chris Trask 9 Siliconix Application Notes 7162 2012-01-09 09:17:06 VU3AUZ 4 BGA Inspection - Requesting Suggestions & Guidance 7158 2012-01-06 13:57:31 Stephen Farthing 1 Interesting TRF Rx 7153 2012-01-05 05:59:49 Leon Heller 5 SPICE simulation of an oscillator - getting it to start. 7151 2012-01-04 21:44:32 Cliff McCreery 6 Binaural Receivers 7136 2012-01-03 05:25:01 ha5rxz 12 Ohm Meter Calibration 7130 2011-12-31 07:47:04 Chris Trask 2 KISS Mixer PCB Artwork 7126 2011-12-30 00:31:44 pauldebono@rocket... 4 Gas filled tubes arrestors 7124 2011-12-29 18:23:56 dnorbury 2 PCB board softwares, services 7121 2011-12-29 12:18:49 ka7exm 3 Looking for PIC Power CPU for UK Ham 7114 2011-12-28 17:04:04 Baltasar Perez Di... 14 Tuneable 10.7MHz notch filter 7112 2011-12-26 12:21:07 ha5rxz 1 Regarding The Problem Of Impedance 7109 2011-12-23 14:50:25 Chris Trask 3 Mixer Musings and the KISS Mixer (revised) 7090 2011-12-22 11:17:35 Bradford 4 Far Circuit Zero Beat Indicator parts list help 7088 2011-12-22 08:29:07 Ashhar Farhan 11 Repeater front-end 7086 2011-12-22 04:54:44 g3wie 5 Equivalent networks for top-coupled circuit filters 7083 2011-12-21 12:22:38 Chris Trask 3 KISS Mixer Performance 7065 2011-12-20 13:57:00 ha5rxz 3 A Problem Of Impedance 7038 2011-12-18 12:30:13 Chris Trask 41 Mixer Musings and the KISS Mixer 7030 2011-12-16 04:23:22 Barry N1EU 1 HYCAS 9Mhz 7028 2011-12-15 18:54:38 vlfun2 2 XF-9S42, 43, 44 crystal filters 7014 2011-12-14 04:41:33 Ben Pharr 11 Core Loss in High Frequency Inductors 7012 2011-12-13 22:09:34 Thomas S. Knutsen 8 OT: Good hands-on RF grad schools? 7011 2011-12-13 08:11:29 Tim 1 160 Meter tuner success 7001 2011-12-10 17:30:35 jasonb1963 3 Load Angle and Phase Delay in CMCD and Class E Amplifiers 6980 2011-12-09 04:26:31 Stephen Farthing 2 Class D amplifiers... 6977 2011-12-08 19:07:50 jasonb1963 27 Class D RF Amplifiers 6951 2011-12-05 10:02:33 dnorbury 6 Ribbon cable stripping and connectors 6945 2011-12-04 05:42:47 john 4 Collins Mechanical Filter 6932 2011-11-28 21:28:13 ehydra 10 filter design with standard n-multiple parts 6929 2011-11-28 08:48:47 Markus Hansen 1 Re: Smooth audio T/R switching and Hybrid Cascade IF and S meter cct 6928 2011-11-28 02:25:59 N1EU 3 Smooth audio T/R switching 6926 2011-11-27 16:43:42 vlfun2 1 hybrid cascode Amp with S meter 6913 2011-11-27 05:54:26 jeffthom99 1 Need EMRFD CD 6898 2011-11-26 14:10:03 Ray 7 Feedback amplifiers in series 6895 2011-11-26 07:03:26 jasonb1963 41 Best Practices for PCBs 6875 2011-11-24 08:37:09 jasonb1963 3 Portable Software Defined Transceiver 6867 2011-11-23 18:38:57 wb8yyy_curt 8 Hybrid Cascode AGC 6863 2011-11-23 02:04:03 vlfun2 22 Sensitive AM Detector 6858 2011-11-22 07:39:00 hb9bnk@uska.ch 3 Where to find Serenade 8.5 SV ? 6850 2011-11-18 18:56:42 vlfun2 20 Hycas IF/455KHz 6849 2011-11-18 11:40:59 Ross Tucker 1 Modern speaker elements 6838 2011-11-17 14:52:10 Bill Meara 11 My JBOT hates antennas 6834 2011-11-16 21:20:56 Ross Tucker 2 Front panel hookup ground loop? 6828 2011-11-15 09:27:05 Alberto I2PHD 6 Unknown component 6815 2011-11-10 21:52:35 jasonb1963 17 Update on FLL Experiment 6812 2011-11-09 19:16:40 jasonb1963 3 Frequency Locked Loop 6788 2011-11-07 18:37:00 Ray 23 Part similar to MC1350 6786 2011-11-07 17:17:18 wa9cgz 5 Negative Resistance Preamplifier 6765 2011-11-04 09:11:33 Alberto I2PHD 3 Terminating impedance of the Yaesu XF-455k-262-01 filter 6761 2011-10-27 14:47:24 jasonb1963 20 Thoughts on 15M Transceiver? 6759 2011-10-27 07:21:29 Donald 2 Resistor Type 6755 2011-10-18 16:37:27 Bob 4 Q Multiplier Revisited 6749 2011-10-17 17:41:58 Ray 4 Emitter Follower Output impedance 6747 2011-10-17 08:15:21 Tim 4 CS2100 synthesizer chip 6745 2011-10-16 08:27:44 Donald Kelly 1 Re: 10M VFO ideas (my simple ones) 6738 2011-10-15 08:48:09 Tim 8 10M VFO ideas 6734 2011-10-11 06:55:18 jnm659 4 Newbie Question - help with amplifier basics, please. 6720 2011-10-06 17:58:19 ka7exm 1 Regarding Jobs' postings 6718 2011-10-06 15:20:09 Lasse 13 Where to find crystals for converters 6708 2011-09-27 15:49:21 Bradford 6 Voltage regulator Ci and Co capacitors what kind?? 6707 2011-09-26 12:13:48 Bill Kelsey 2 2012 ARRL Handbooks and Antenna Handbook 6701 2011-09-23 08:34:30 ad7zu 6 crystal filter basic questions 6696 2011-09-20 06:29:47 Alan Melia 1 using WWV 10MHz 6650 2011-09-13 04:30:09 Fernando Krouwel 12 About Elecraft K2 Receiver 6647 2011-09-12 19:51:24 Jim Miller 9 Lambda diode and Transmitting Loop antennas 6627 2011-09-10 11:39:41 dnorbury 8 Toroid identification 6622 2011-09-10 06:35:13 qrp.gaijin 1 Single-transistor nulling Q multiplier - how? 6586 2011-09-08 23:26:05 Ray 82 WWV 10 MHz Receiver 6585 2011-09-08 19:17:14 ka3j12 1 10.738 MHz IF 6584 2011-09-05 15:41:22 Mike 1 Noise Floor Studies 6583 2011-09-05 13:37:13 Tim 1 Full break in transceiver 6563 2011-08-22 23:35:16 Kerry 16 Measurement Receiver Sensitivity 6562 2011-08-22 16:13:43 ka3j12 5 Shielding in SSB Xmtrs 6560 2011-08-22 12:28:12 looking1513 2 missing documents 6545 2011-08-16 09:50:09 Dan Mills 11 Norton feedback power amplifier? 6540 2011-08-15 17:23:10 rcbuckiii 8 Sweep frequency generator 6538 2011-08-08 09:35:14 Chris Howard 2 question about some cable 6532 2011-08-06 19:39:26 qrp.gaijin 8 Single-signal DC rx without AF phase shift 6531 2011-08-04 09:59:20 Don Wines 1 OT: Books FS: Antenna and SPICE Texts 6525 2011-08-01 14:15:24 w9ifz 6 paralleling RF output transistors 6523 2011-08-01 12:31:19 kx4om 1 Heathkit-style double-fuse plug 6520 2011-07-31 08:45:21 Ron McCurdy 1 FW: [emrfd] low output IRF510 6519 2011-07-31 08:16:07 John 3 low output IRF510 6516 2011-07-29 08:32:29 Ashhar Farhan 3 lost the emrfd cd 6503 2011-07-22 10:21:27 john 4 reconditioning previously used PC boards 6496 2011-07-22 06:37:02 Tamás Fábián 12 Tayloe detector with diodes 6490 2011-07-21 23:05:53 Ashhar Farhan 6 Recommendations for mixer diodes 6481 2011-07-21 10:59:58 Bill Carver 6 Re: Cartesian loop exciter - QSK 6469 2011-07-20 08:56:45 Dan Mills 10 Cartesian loop exciter? 6465 2011-07-19 17:44:13 KK7B 3 Alternative Receiver Architectures 6444 2011-07-17 08:35:02 qrp.gaijin 30 Single-signal regenerative receiver 6439 2011-07-10 06:20:32 Ashhar Farhan 5 Pondering over spectrum analyzers 6433 2011-06-30 06:29:18 peepholenz 4 Crystals and Crystal Filters 6431 2011-06-29 09:28:28 Ashhar Farhan 4 silver ink pen to draw circuit boards 6429 2011-06-28 02:08:50 ha5rxz 2 McMaster Carr Order Blocked 6425 2011-06-27 12:43:26 ka3j12 3 HC49/US Crystal Parameters 6421 2011-06-26 13:03:14 richj_focus 4 DFN 10-pad package prototyping 6420 2011-06-21 08:19:03 Ashhar Farhan 2 ixys rf 6408 2011-06-20 05:58:13 Chris Trask 9 OT: Bob Pease Dies in One-Car Accident 6405 2011-06-19 13:27:11 rcbuckiii 3 Spectrum Analyzer IF frequency 6396 2011-06-17 05:41:21 bobtbobbo 5 RD70HHF1 amplifier schematic 6390 2011-06-16 13:45:02 Mike Dinolfo 7 1n914 with jfet vfo 6385 2011-06-16 06:36:48 kx4om 10 12BY7A driver to Ten-Tec 6m transverter 6381 2011-06-15 09:40:35 wb8yyy_curt 3 PA Circuit Enclosed in Altoids Tin ? 6377 2011-06-08 18:36:30 zl3ab 3 Introduction & EMFD Power Meter question 6375 2011-06-07 20:25:11 Ashhar 4 rf pickup from relays 6374 2011-06-07 06:49:58 Gian 1 New NXP RF Manual available 6370 2011-06-05 15:09:03 Thomas S. Knutsen 2 High intercept MMIC 6369 2011-06-05 14:20:14 rcbuckiii 1 Replacement EMRFD CD 6364 2011-06-04 07:08:32 wb8yyy_curt 6 VFO Spot Frequenncy Error 6358 2011-06-01 20:57:51 billw77aaz 6 UM2104C PIN DIODE 6351 2011-05-30 06:48:32 John 1 VE7ZM California Board 6321 2011-05-17 20:23:44 rcbuckiii 17 DDS driven PLL 6315 2011-05-17 07:30:51 KK7B 2 Static 6314 2011-05-17 04:43:06 Russell Shaw 5 Quad MOSFET array 6300 2011-05-16 03:31:31 Adrian Scripca 13 Audio RMS voltmeter schematic needed 6292 2011-05-15 09:10:56 pauldebono@rocket... 10 AM detection in DC receivers 6283 2011-05-13 12:52:23 Jim Stafford 1 Don't miss FDIM at Dayton this year! 6275 2011-05-11 16:18:20 ken evans 1 FDIM Vendors - please register 6273 2011-05-11 12:15:15 Paul 17 old Tripplet 2432 sig gen 6272 2011-05-11 10:35:34 Glen Leinweber 2 ceramic resonator power limit? 6270 2011-05-10 23:57:08 brainerdd 1 TAK-40 Front Panel boards 6256 2011-05-06 09:39:47 Pete N6QW 8 Driving two DBM's from a single LO 6255 2011-05-06 09:00:06 KK7B 6 BC-348 6248 2011-05-04 23:38:32 ha5rxz 1 The Green Carpet Club 6239 2011-05-03 08:07:52 Chris 6 High Isolation Feedback Amplifiers 6235 2011-05-02 22:44:27 KK7B 14 FM 6232 2011-04-30 22:37:08 Ashhar Farhan 4 ultra-linear power amplifiers 6231 2011-04-30 07:35:27 ward 1 Re: two new tools. 6228 2011-04-28 18:09:36 ward 3 two new tools for the amateur radio designer 6226 2011-04-28 10:43:08 Bill Kelsey 3 Dayton Specials - books and kits from Kanga US 6218 2011-04-27 08:24:38 Tim 6 K7HFD oscillator simulations and real-life tank measurements 6213 2011-04-26 20:42:11 David 4 audio filter design rules of thumb 6208 2011-04-26 08:23:11 w5ida 8 HamCalc 6206 2011-04-26 06:38:26 Chris Trask 1 JPL Amplifier (was: New file uploaded to emrfd) 6203 2011-04-26 06:15:27 Sam Morgan 1 a plead about subject labeling 6202 2011-04-26 06:04:40 ha5rxz 3 A High Isolation Amplifier Produced By JPL 6166 2011-04-23 09:28:25 richj_focus 12 RF isolation amplifier 6157 2011-04-20 15:12:42 dnorbury 7 Ceramic capacitor values 6153 2011-04-20 10:18:46 ad7zu 5 Xmit Mixer questions 6149 2011-04-19 03:12:11 d29602960 5 Power MOSFET protection diode (Source DRain). 6148 2011-04-17 07:24:18 WA0ITP 1 Earbuds 6119 2011-04-13 22:00:34 David 21 low power audio amp 6113 2011-04-13 17:05:33 joe 4 Cleaning Coils 6104 2011-04-13 14:31:10 Edson 15 Output transformer for push-pull MOSFET final RF amp 6091 2011-04-11 16:38:36 ka3j12 10 5 Watt Amp Opttions 6088 2011-04-10 10:44:40 cybrlnk 3 MC1496G Gilbert Cell Mixers 6079 2011-04-09 13:14:15 dnorbury 8 Component sources - now looking for signal generator 6077 2011-04-08 07:32:20 patt896 3 Lodestone Formers Group Purchase 6074 2011-04-07 16:31:02 Chris Trask 5 Split-Ring Mixer (was: high level mixers) 6050 2011-04-06 11:55:37 dnorbury 21 Good sources for parts? 6039 2011-04-04 14:53:29 Chris Trask 4 Fw: TI to acquire National Semiconductor - What this means for you 6018 2011-04-04 03:48:13 Ashhar Farhan 14 wide range double tuned circuit 6004 2011-04-03 00:49:25 ha5rxz 5 Another Mixer 6000 2011-04-02 18:39:53 w1kilofoxtrot 2 Ansoft HFSS experts here? 5992 2011-04-02 07:18:01 Brooke Clarke 3 Mixer Diodes 5988 2011-04-01 13:47:19 Mike Short 1 Motorola SRF2857 power transistors 5979 2011-04-01 06:50:46 bty230314 5 TUF1 and TUF2 Mixers 5974 2011-03-31 11:35:45 Bob 2 AN HF / VHF Colpitts VCO Variant 5961 2011-03-28 05:40:31 hb9aqh 2 NPR testing 5938 2011-03-26 13:14:09 kb1gmx 69 high level mixers 5937 2011-03-21 17:58:38 kilocycles 15 Custom crystals 5931 2011-03-17 10:27:17 Gian 2 PA3AKE High performance Project - Newest updating 5926 2011-03-17 03:32:13 Tim 7 Ham band freqs from microprocessor crystals 5924 2011-03-16 19:54:39 Bill Kelsey 3 New Kit at Kanga US 5919 2011-03-15 21:05:19 dave1e100 3 "Wrap-around" biasing of an NPN 5903 2011-03-10 07:24:42 Harold Smith 10 another Mixer level question 5897 2011-03-09 08:34:44 ha5rxz 3 Mixer Confusion 5894 2011-03-09 06:13:52 aadlh48 9 mix differences between Amidon and Micrometals iron powder toroids 5885 2011-03-04 18:25:15 Phil Sittner 9 Off Topic-Antenna end effect/capacative hat 5880 2011-03-03 00:43:01 ha5rxz 5 LA5523 Motor Driver IC 5869 2011-02-22 11:11:25 Bob 1 An Audio Noise Generator - Followup 5866 2011-02-22 07:35:05 Thomas S. Knutsen 5 microR2 gain 5855 2011-02-18 19:56:14 Richard Stasiak 20 Crystal filter - pull frequency? 5850 2011-02-17 20:06:05 Craig D. Smith 5 Re: Grayhill clips 5844 2011-02-16 14:35:39 Bob 9 An Audio Noise Generator 5840 2011-02-15 13:01:56 Glen Leinweber 4 self-protecting multimeter 5839 2011-02-15 10:05:55 Brooke Clarke 1 Re: Digest Number 1295 5838 2011-02-15 02:15:39 iapizloj 1 Seco 500 crystalignmeter 5833 2011-02-09 22:44:16 Norman Dennett 4 SA vs VNA 5832 2011-02-09 13:03:42 Chip 1 2N4416 availability? 5822 2011-02-07 05:37:00 MAc 9 hycas - resonant circuit 5818 2011-02-06 08:28:14 ha5rxz 1 45 MHz IF Transformers 5817 2011-02-05 19:30:07 g0kla 5 Common Gate FET front end filter 5816 2011-02-05 18:57:53 joe 2 QSK and high power amplifier 5814 2011-01-28 19:42:37 Wes 1 Schematic diagrams updated. 5794 2011-01-27 06:21:02 Craig D. Smith 21 Component test fixture 5784 2011-01-25 18:36:01 Ross Tucker 9 off-topic question: where are the 50k audio pots with switches 5773 2011-01-23 15:39:36 alan7114p 12 Modular Direct Conversion Receiver--Help Neede 5755 2011-01-20 06:39:29 wa9cgz 18 Pin Diode Help 5752 2011-01-19 14:23:11 Chris Trask 3 Interference Cancelling Using Correlation Feedback 5749 2011-01-16 08:21:38 Jason W6IEE 2 "Hidden" wine for LTSPICE under Linux 5731 2011-01-14 07:39:41 Brooke Clarke 1 AM Radios 5700 2011-01-09 13:46:28 Rob Steenburgh 46 Distorted output waveform from Wilderness Sierra 5689 2011-01-06 16:48:38 g0kla 4 High voltage capacitors 5654 2011-01-03 18:14:36 RadiosRUs 23 Copper Plate for QRO FET 5650 2011-01-03 10:04:32 Brooke Clarke 1 Quality AM Radio 5648 2011-01-03 05:41:30 Stephen 2 Building and cooking are a lot alike 5645 2011-01-03 02:02:24 brainerdd 6 QRO FET 5627 2011-01-01 08:38:15 Chris Howard 6 a question about O'scope waveform 5622 2010-12-31 11:08:54 Paul Daulton 1 re polyvaricons 5619 2010-12-31 08:22:54 klopfensteinrex 4 Using Feedthru capacitors? 5616 2010-12-30 18:56:52 Wes 1 More Polyvaricon cap stuff. 5611 2010-12-30 16:58:12 Paul Daulton 1 Re: "Polyvaricon" capacitor 5610 2010-12-30 15:43:47 aa7hq 4 i read that am radios are mostly junk 5605 2010-12-30 13:07:33 Wes 36 "Polyvaricon" capacitor 5594 2010-12-28 09:46:22 ae5ew 3 Speaking of Audio Cabling 5589 2010-12-28 00:25:09 ae5ew 12 EMRFD Book 5580 2010-12-26 19:37:18 Chris Howard 4 Trouble with Fig 4.11 5578 2010-12-26 18:03:07 Chris Waldrup 1 Crystal question 5553 2010-12-24 10:32:29 Chris Trask 30 WTB: VCXO 5537 2010-12-23 14:51:02 ae5ew 4 ARRL Handbook Projects 5535 2010-12-23 14:34:15 ae5ew 17 Ferrite mix 31 5532 2010-12-21 06:38:09 KK7B 2 Basic Receiver 5525 2010-12-14 10:15:14 Vincenzo Calandra 2 Phase shift oscillator 5521 2010-12-09 17:04:24 klopfensteinrex 8 "First Receiver" 5520 2010-12-09 15:40:18 Kerry 10 New Screen Layout 5515 2010-12-08 16:21:59 jmsheph 3 LADPAC 2008 5506 2010-12-06 09:51:54 steve white 6 HYCAS IF/AGC Advice 5498 2010-11-30 13:33:55 joe 3 Soldering iron 5485 2010-11-29 11:21:01 Tamás Fábián 13 Strange, annoying power supply problem 5478 2010-11-29 00:23:50 Nick 12 Receiver planning-filling in the blanks 5472 2010-11-28 13:25:27 klopfensteinrex 5 Spectrum Analyzer Waveform Question. 5469 2010-11-28 12:35:45 klopfensteinrex 8 First Transmitter Problems 5468 2010-11-28 06:13:07 ke1ih 2 Help with hybrid cascode if amp 5457 2010-11-22 08:08:41 Michael McShan 2 CD Rom replacement 5436 2010-11-19 08:11:55 Alberto I2PHD 5 Differential to Single-Ended 5429 2010-11-17 16:59:51 Kenneth Stringham 30 2n7000 Failure 5427 2010-11-14 02:23:53 Justin 1 ARRL Homebrew Challenge 3 5417 2010-11-13 04:52:36 Jim Miller 13 2N7000 failure mode? 5410 2010-11-11 12:43:55 k9jri@att.net 6 Motorola MRF-261 transistor questions 5399 2010-11-08 20:28:13 w7zoi 10 BD139 RF Power Amp. 5398 2010-11-08 13:01:50 Robert Cerreto 2 KA7EXM Power Meter Reality Check 5392 2010-10-28 16:47:38 klopfensteinrex 3 Spectrum Analyser (SA) IF Freq Change 5388 2010-10-27 11:50:27 Tim 7 PMOS keyclick-removing PA switch 5387 2010-10-25 10:34:16 w4zcb 1 Re: Ferrite cup cores 5385 2010-10-21 10:53:54 w4zcb77 1 For any 10 GHz afficianados 5383 2010-10-18 11:04:24 Gian 2 AOR Proto AR7070 5382 2010-10-16 13:55:49 Tim 1 Another better-than-IRF510 contender: STP16NF06L 5374 2010-10-10 05:44:07 wa9cgz 5 Funk amature magazine project 5368 2010-10-09 15:53:49 Chris Howard 2 impluse noise blanker? 5364 2010-10-08 19:24:10 Jason W6IEE 7 simpler FET final Re: More thoughts on gate drive 5360 2010-10-07 12:37:46 nm0s_qrp 2 ARRL HBC III 5356 2010-10-06 18:49:13 Phil Sittner 5 Eagle CAD 5355 2010-10-06 00:18:27 Johan H. Bodin 1 Interesting paper about filters and toroids 5353 2010-10-05 12:36:53 Henry 2 Toroid kit for sale 5352 2010-10-05 10:31:50 Fernando Krouwel 1 Re: [FtTuthill80] Fwd: [emrfd] A question to Dan Tayloe about audio 5348 2010-10-05 07:53:17 Chris Trask 1 Re: [emrfd] Re: X-Môde Mixer 5347 2010-10-05 07:31:49 Fernando Krouwel 3 A question to Dan Tayloe about audio filters 5322 2010-10-01 20:48:35 davidpnewkirk 1 Fun challenge: A lab partner for the "Simple, Effective CW Transmitt 5318 2010-10-01 12:09:46 Tim 26 Class E, 12V, 25W, push pull, 30M high efficiency PA 5314 2010-09-30 20:17:41 Stephen 3 programmable rf attenuator chips? 5307 2010-09-30 10:58:34 ehydra 1 Transmission-line mixer 5302 2010-09-30 07:04:54 zs6cvf 7 W7ZOI Spectrum Analyzer 5293 2010-09-29 04:44:28 Kenneth Stringham 1 [RE]: 74AC... 5292 2010-09-29 02:18:32 davidpnewkirk 14 Getting useful harmonic output from a BJT Colpitts oscillator 5285 2010-09-28 12:12:14 Chris Trask 5 [emrfd] Re: X-Môde Mixer 5279 2010-09-28 09:13:13 Tim 3 Spice model with realistic stray inductances for MOSFET PA 5270 2010-09-28 05:59:13 Chris Trask 2 Re: [emrfd] Question Regarding The X-Môde Diode Mixer 5269 2010-09-28 05:08:23 Kenneth Stringham 4 [RE]: 74G74 replacement for 74S74 5268 2010-09-28 02:42:27 ha5rxz 1 Question Regarding The X-Môde Diode Mixer 5264 2010-09-27 11:32:32 w4zcb 4 Ferrite cup cores 5261 2010-09-27 09:36:26 Tim 2 Push-pull output magnetics styling 5259 2010-09-27 07:46:05 wa9cgz 7 74G74 Patato IC circui help needed 5257 2010-09-26 17:44:29 andres_lu5hah 2 DG8SAQ VNWA Schematic.. 5249 2010-09-25 09:05:35 Bob 9 software files 5247 2010-09-24 21:14:41 Henry 2 Advice on selling ham magazines 5237 2010-09-23 18:05:05 Kerry 6 Measurements On Ferrite Materials 5216 2010-09-21 14:33:50 ep_mand 5 Leader DMM/2 'Scope Model 300: Printer cable?? 5211 2010-09-21 11:55:59 Weddig, Henning-C... 4 AW: [emrfd] X-Mode Mixer 5202 2010-09-19 06:04:20 jmcmakin50 1 New to Forum 5175 2010-09-17 18:08:38 Chris Trask 45 Re: X-Mode Mixer 5171 2010-09-17 12:37:52 Chris Trask 8 X-Mode Mixer (was: mixers: strong signal immunity) 5160 2010-09-17 07:32:03 Tim 3 Toroid transformer flux/watt limits? 5159 2010-09-17 07:27:20 Chris Trask 2 X-Mode Mixer (was mixers: strong signal immunity) 5152 2010-09-16 22:59:02 Joe 5 New Yahoogroups UI - Attn. Listowner 5138 2010-09-16 12:02:06 Bill Kelsey 1 2011 ARRL Handbook offer 5119 2010-09-16 02:31:03 davidpnewkirk 1 A fascinating cascode-triodes-detector finding--and more (long) 5098 2010-09-14 03:54:51 Nick 8 How does a DC receiver sound? 5095 2010-09-12 16:27:27 Phil Sittner 1 Hamswap finds 5088 2010-09-12 10:36:56 ehydra 59 mixers: strong signal immunity 5083 2010-09-12 05:42:38 g3zoh 11 Coupling Coefficients 5069 2010-09-08 07:42:00 Tim 14 N750 is now U2J 5061 2010-09-06 10:16:27 Dino Papas 1 Great Deal on SSDRA 5056 2010-09-05 13:06:53 w1kilofoxtrot 4 Older files purged? 5045 2010-09-04 13:39:37 Ken Evans 2 FDIM 2011 Building Contest 5028 2010-09-03 12:04:35 Phil Sittner 1 Crystal Resonator Filters 5019 2010-09-03 07:32:27 Tim 30 VFO construction technique stability observations 4966 2010-08-31 09:08:55 WA0ITP 10 Toroid Windings and Inductance values 4949 2010-08-29 16:29:15 Ashhar Farhan 60 Using a DDS as a PLL reference 4939 2010-08-29 09:05:04 ha5rxz 2 June 2001 QST Power Meter 4923 2010-08-26 17:26:25 k5myj 33 SI-570? 4922 2010-08-24 09:37:12 g3oth 1 SE Labs Oscilloscope EM 102 4921 2010-08-21 08:37:40 Henry 1 Antenna Compendium books for sale 4920 2010-08-21 08:34:53 Henry 1 K8IQY Precision VXO for sale 4918 2010-08-19 17:54:42 Mike Short 2 Semiconductors, etc. 4917 2010-08-17 20:52:00 ka7exm 1 Regarding EMRFD group settings 4905 2010-08-16 09:11:04 aa7hq 12 those signals on 433.92 MHZ 4900 2010-08-15 14:53:19 aisea6 5 electric fence enegizer 4898 2010-08-14 18:20:50 aa7hq 4 two-element antenna tuners 4896 2010-08-12 12:22:11 John Marshall 3 Return Loss Bridges 4890 2010-08-11 16:44:14 Henry 2 Noiscom NC302L noise diode for sale 4887 2010-08-11 09:29:10 iq_rx 5 ~campbell web page 4877 2010-08-10 10:04:14 Ashhar Farhan 11 wes' booklet on setting up a home lab 4872 2010-08-09 10:03:55 richj_focus 5 Packing components 4871 2010-08-08 22:50:50 eculbert 1 Stereo scope and etc 4867 2010-08-08 19:55:13 Henry 1 Hy-Gain BN-86 balun for sale 4864 2010-08-08 16:32:27 Henry 2 Instruments for sale 4851 2010-08-04 16:17:53 brainerdd 14 XTALs for filter 4846 2010-08-03 06:40:15 Tim 1 Simultaneous T and R output VFO 4843 2010-08-02 13:52:51 Dino Papas 7 Stereo Microscope for SMD Work 4838 2010-07-29 16:17:27 Henry 1 VHF and UHF gear for sale 4829 2010-07-27 08:34:58 Henry 2 Small chokes and xformers for sale 4828 2010-07-27 08:33:26 Henry 2 Ceramic coil forms for sale 4827 2010-07-27 08:30:32 Henry 3 LED's for sale 4826 2010-07-27 05:59:58 Tom 7 Steve Weber Butterfly DDS VFO 4821 2010-07-25 14:45:31 thomas 9 Delay lines 4815 2010-07-22 15:11:42 jabauzit 6 Buying Components 4812 2010-07-21 08:19:48 bobtbobbo 3 Transformer data 4811 2010-07-19 13:44:07 Henry 1 FS: Alliance Tenna Rotor 4810 2010-07-19 07:56:54 Nick Kennedy 1 HYCAS in a receiver 4806 2010-07-13 05:52:33 elia_2e0zhn 4 Diode Equivalent 4793 2010-07-11 11:30:50 Robert Cerreto 13 Need A varactor 4791 2010-07-01 19:38:25 Ron McCurdy 2 Binaural I-Q Receiver 4785 2010-06-25 19:00:34 dixonglennb 1 20M 10W BS170 transmitter proto 4782 2010-06-23 08:51:11 Glen Leinweber 8 Regen musings 4779 2010-06-22 18:22:54 Phil Sittner 36 Re: Test Message 4778 2010-06-13 07:06:40 Brooke Clarke 1 Power Amp Design 4777 2010-06-13 00:29:51 drmail377 1 Power Amp Design Article 4766 2010-06-10 03:49:16 lb3hc 10 Linear amplifier. Low output on 12m and 10m. Need advice. 4765 2010-06-09 04:53:47 Fernando Krouwel 2 Polyakov Mixers 4760 2010-06-08 11:55:34 kilocycles 6 Oscillator-multiplier tube rigs - Was: Re: AGC audio chain 4755 2010-06-05 07:29:30 Bruce Beford 1 Update: 2n4416A JFETs F/S 4740 2010-06-02 19:11:41 Robert Cerreto 2 OOPS!!!! MRF492 Substitute 4739 2010-06-02 15:44:07 Robert Cerreto 2 MRF140 or Substitute 4728 2010-06-01 13:33:05 John Levreault 27 AGC audio chain 4723 2010-05-27 12:18:42 Bruce Beford 1 Update: 2n4416A JFETs 4719 2010-05-27 02:50:52 drmail377 7 JEDEC/EECA/JIS Cross Reference 4714 2010-05-25 13:23:55 Dino Papas 1 QEX Collection for Sale 4709 2010-05-24 08:03:58 Tim 7 Power MOSFET gate drive 4707 2010-05-23 11:01:57 Ken Evans 1 Late FDIM Awards and Hall of Fame Announcement 4704 2010-05-23 04:36:19 n1rx 3 FS: 2N4416A 4702 2010-05-18 13:08:48 w1kilofoxtrot 6 Mixer terminating diplexer tuning 4701 2010-05-18 06:53:04 WA0ITP 1 FDIM 72 Part Challenge 4699 2010-05-17 14:06:04 WA0ITP 1 Innovation 4695 2010-05-17 07:36:36 Tim 9 $28.36 for fifty watts 4684 2010-05-14 16:51:01 elia_2e0zhn 2 Sweep generator general question 4679 2010-05-12 07:38:39 Colin Beeforth 3 Re: balloon beacon 4674 2010-05-11 11:32:05 Corey Minyard 5 Questions about an SDR PSK-31 rig for a balloon beacon 4673 2010-05-11 11:20:34 Tim 1 Nonlinearity = important in oscillators 4664 2010-05-08 00:41:33 ha5rxz 19 Vackar Crystal Oscillator 4656 2010-05-06 11:30:41 kanewderfish 2 2 stage buffer amp from SSDRA 4647 2010-05-06 07:48:36 popmedkoh 16 When is a junkbox semiconductor too old to use? 4644 2010-05-05 16:25:06 Stephen Wandling 4 Building the Universal QRP Transmitter 4640 2010-05-05 12:26:34 Joe 1 OT/FS - 4.5 tpi 2 conductor #18 4637 2010-05-05 12:14:09 w4zcb 3 Re: [emrfd] ¿Anyone has the "tech notes" article of Allan Victor? 4636 2010-05-05 11:50:04 Anthony 3 ¿Anyone has the "tech notes" article of Allan Victor? 4627 2010-05-04 08:31:00 gi0gdp 11 Against Ugly Construction 4620 2010-05-02 02:19:59 ha5rxz 7 In Praise of 'Ugly' Construction 4611 2010-04-29 18:30:17 R Wall 3 W3NQN Tx BPF Basic Program..... where can I get it. 4607 2010-04-29 07:34:39 Nick Kennedy 2 Squarer circuit for power indication 4599 2010-04-28 10:13:57 g0kla 10 Quadrature Splitter 4596 2010-04-28 09:13:49 nm0s_qrp 4 Adjusting Values of Toroids 4595 2010-04-28 07:50:14 w5ida 2 Source for Regen Receiver Parts 4586 2010-04-27 03:38:27 Heikki 6 12 MHz if for tx applications 4584 2010-04-26 19:03:35 Phil Sittner 5 14mhz Receiver 4580 2010-04-26 10:08:19 ha5rxz 5 Very Low Profile IC Sockets 4574 2010-04-25 18:06:52 Tim 5 ERF2030 RF transistor anyone? 4562 2010-04-24 06:34:18 michael709135 1 G3RJV Talk on BATC video website 4558 2010-04-23 12:59:16 Jim Miller 11 SWR Question 4554 2010-04-23 07:58:37 Tim 3 Critique this class C 80M MJE181 12W push-pull amp 4546 2010-04-22 17:52:18 bkopski 2 A NO PASS FILTER 4535 2010-04-20 14:24:55 Vojtěch Bubník 13 problem with IRF510 push-pull PA 4533 2010-04-20 07:07:47 Tim 10 Multiplier chains and filters and transmitted fundamentals 4532 2010-04-19 14:37:24 Ken Evans 1 FDIM 2010 Last Call 4529 2010-04-16 15:27:28 Tim 3 Voltage regulator noise = phase noise 4523 2010-04-12 08:02:47 Paul 6 What is a Mini Circuits T2-6T ? 4522 2010-04-10 17:43:41 n0jrn 1 Need Resistors 4513 2010-04-06 14:50:29 R Wall 9 Contact bounce problem with AADE LC meter.... 4506 2010-04-05 08:15:39 alan7114p 8 Capacitor value in Regenerative Receiver 4498 2010-04-02 14:16:30 Dave 9 Interesting filter construction 4493 2010-03-30 11:59:31 wa9cgz 2 O.T. Tak40 4487 2010-03-29 04:40:35 Tim 6 Multifiliar to the max: 11-filiar! 4475 2010-03-26 15:17:59 bkopski 1 A Simple Tracking Generator 4471 2010-03-26 10:42:11 Glen Leinweber 16 toroid winding with large dia. wire 4470 2010-03-21 16:35:39 Ken Evans 1 FDIM 2010 QRP Challenge Info request 4459 2010-03-15 14:05:09 Chip Owens 7 Divide by 2 in Class C amplifier 4455 2010-03-14 17:45:14 Phil Sittner 3 EMRFD Fig 6.79 4454 2010-03-14 14:02:19 Gian 1 AOR AR7070 HF Receiver - Updated infos 4451 2010-03-14 09:23:10 ha5rxz 1 AD9951 Interfacing & Programming 4450 2010-03-14 07:50:05 Phil Sittner 1 $400 1.3GHz vector network analyzer, and a couple of tiny oscillosco 4449 2010-03-13 09:00:24 drmail377 8 NPO Capacitors, Lowest Microphonics in DC RX? 4446 2010-03-12 11:12:46 Tim 1 CD4007 = CA3600 4437 2010-03-11 08:12:35 Blanco Hugo Danie... 5 Phasing Receiver. 4421 2010-03-10 07:40:34 ve3hoh 18 MAR-1 4417 2010-03-08 16:44:05 Andy 10 USB spectrum analyzer 4414 2010-03-06 11:12:47 Phil Sittner 2 Fw: Re:W7ZOI 14Mhz receiver 4411 2010-03-04 12:41:17 g0kla 2 Explosion 4400 2010-03-03 14:51:21 patt896 1 Lodestone Former Group Purchase for CDG2000 and Star BPFs 4398 2010-03-03 11:13:58 Henry 1 Alliance Tenna-Rotor For Sale 4393 2010-03-03 06:52:05 Tim 3 Carving up PC board construction, single-point grounding 4383 2010-03-01 20:44:42 Phil Sittner 25 W7ZOI 14Mhz receiver 4382 2010-02-26 18:48:47 patt896 1 Ultimate Polarity Protection Circuit 4381 2010-02-26 07:05:12 David Stone 1 [RE]:inductors with current 4380 2010-02-26 06:14:05 Kenneth Stringham 1 [RE]: Inductor with Current 4374 2010-02-24 20:14:07 Gary 2 EMRFD in the Classroom 4372 2010-02-24 16:15:21 David L. Foreman 1 A little bit OT perhaps looking for a source of ones and two for fla 4371 2010-02-24 14:18:05 Stephen Wandling 1 DC Current Gain comparisons 4370 2010-02-24 13:22:50 R Wall 3 Phase detection circuit to measure frequency.... 4366 2010-02-23 17:37:15 Paul Anderson 2 Ceramic discriminators? 4365 2010-02-23 16:14:46 Steve, G4GXL 1 Buildathon 2010 - book now ! 4317 2010-02-21 16:18:58 john 13 Solder Wick 4306 2010-02-20 16:00:11 hariz yacine 48 LC circuit 4303 2010-02-20 08:43:27 Brooke Clarke 1 Understanding Mixer Diodes 4296 2010-02-19 08:33:34 wa9cgz 4 Matching Mixer Diodes 4293 2010-02-19 07:20:02 k5nwa 3 (no subject) 4289 2010-02-18 19:24:59 patt896 6 Suggestions to K7ZOI & other excellent providers of amateur designs 4282 2010-02-18 07:21:14 kilocycles 2 CA3046 availability 4275 2010-02-18 00:49:32 iami78 11 Double balanced mixer response to LO * 3 4271 2010-02-17 09:01:34 david_c_partridge 9 Newbie question on RF relays, attenuators and substrates 4267 2010-02-16 08:18:15 Kenneth Stringham 2 DC Bias 4265 2010-02-15 09:04:56 ajparent1 1 figure 6-110 bidirectional amp question 4256 2010-02-11 14:33:36 Chris Trask 1 CA3046 Superflexodyne Receiver 4247 2010-02-11 11:56:46 Nick Kennedy 14 CA3046 transceiver in SPRAT 4243 2010-02-11 10:19:44 topossibilities 10 Circuit design simulation software recommendation? 4240 2010-02-10 06:08:26 Chris Trask 2 CA3146 4230 2010-02-09 05:57:46 Nick Kennedy 3 Re: CA3046 squarer 4216 2010-02-07 17:34:09 k5nwa 5 Bipolar array input 4208 2010-02-06 04:46:02 Weddig, Henning-C... 4 AW: [emrfd] Re: Crystal Test Set Designed by Chris Trask 4197 2010-02-04 17:57:35 bcdlr 4 LO for DC RCVR & DSB XMTR 4189 2010-02-04 09:12:52 Pete N6QW 5 Simple Superhet 4182 2010-02-03 20:45:38 ajparent1 6 origin of Pretty good and the minimim gain superhet 4158 2010-02-02 14:58:17 R Wall 1 ITT Filter - myVNA matching tool. 4155 2010-02-02 13:46:01 Chris 11 Pretty good Superhet as a test receiver 4153 2010-02-02 11:59:57 Glen Leinweber 10 Fools proceed 4152 2010-02-02 10:38:37 troyml 8 EMRFD CD 4150 2010-02-02 08:34:55 Henry 1 Simpson meters for sale 4137 2010-02-01 11:49:43 Robert Cerreto 15 Crystal Test Set Designed by Chris Trask 4125 2010-02-01 03:01:03 steve white 1 BFR90 or BFR91substitute 4124 2010-01-31 14:04:48 davidpnewkirk 2 Reference: Hartley oscillator inductance based on 2 not-coupled coil 4105 2010-01-31 04:59:46 ha5rxz 9 Ladder Filter Construction 4103 2010-01-30 20:17:19 jorschei 2 LT5517 I&Q demodulator specs' 4095 2010-01-29 14:31:44 steve white 57 CA3055 ?? 4091 2010-01-28 05:13:51 n2toh 4 LT5517 4085 2010-01-26 09:19:53 Ken Evans 1 QRP Quarterly Accessible to Visually Impaired 4076 2010-01-24 09:01:27 k5nwa 11 Grounded Base Power amplifiers 4062 2010-01-22 04:18:45 alessandro.aquili 1 17 meters transceiver with DSP 4059 2010-01-20 18:49:20 ham@i-zoom.net 2 Ceramic resonators 4058 2010-01-20 16:51:51 Glen Leinweber 8 Leeson equation: Q 4046 2010-01-20 06:48:52 Tim 3 K7HFD high-level low-phase-noise VFO 4039 2010-01-19 18:42:01 yiannis_w8gxu 3 CERAMIC RESONATOR WANTED 4038 2010-01-19 17:53:47 john 3 Mixer from TV tuner 4031 2010-01-19 07:39:33 Tim 1 Better PCB box lids and Sheet metal redux 4027 2010-01-19 06:13:16 Nick Kennedy 6 Class C tube amp load resistance 4014 2010-01-18 19:17:37 WA0ITP 4 60 Cycle Hum on End Fed Wire 4012 2010-01-18 19:01:55 Tim 16 Buzzing noise in DC receiver with no antenna... weird 4008 2010-01-18 13:27:25 aa7hq@comcast.net 3 impulse response, graceful or ??? 3988 2010-01-15 16:49:27 Paul 2 OT - free caps 3986 2010-01-15 12:01:51 Stephen Wandling 25 Toroids: Phase, Sense & Direction 3984 2010-01-15 05:17:08 topossibilities 1 FS: Lots of parts and semi-kits 3982 2010-01-15 01:47:38 Dominic Baines 1 Flea transformer pics 3977 2010-01-14 08:56:36 Pete N6QW 13 Hybrid (Filter + Phasing) Transceivers 3965 2010-01-11 17:22:36 elia_2e0zhn 6 Spectrum Analyzer Assistance Please 3948 2010-01-05 09:55:33 Chris Trask 21 Spur-Free Synthesizers 3947 2010-01-04 16:34:22 Pete N6QW 3 EMRFD 3938 2010-01-01 18:34:43 Tim 10 Listening to receivers again: HW-16 this time 3937 2009-12-31 20:34:14 Phil Sittner 1 EIP Model 545 Counter 3925 2009-12-27 20:03:03 WA0ITP 3 Transmitter Stage Matching 3923 2009-12-25 07:13:34 Kenneth Stringham 1 Re: Filter Matching 3916 2009-12-23 19:05:52 Phil Sittner 5 Peaking Coils 3907 2009-12-23 05:04:55 Robert Cerreto 1 Fw: [emrfd] Method of Science - A Wiki entry 3905 2009-12-22 20:28:57 Ashhar Farhan 3 Method of Science - A Wiki entry 3899 2009-12-22 11:35:39 Vern VanZ 15 Crystal filter matching transformers 3892 2009-12-22 08:38:19 ha5rxz 4 Rail Splitters & Headphone Amplifiers 3891 2009-12-22 08:22:32 chrisethompson 12 Clock, hum and woe 3890 2009-12-22 06:33:26 Ashhar Farhan 4 A Wiki entry 3885 2009-12-20 17:28:32 Ross Tucker 2 emrfd Regenerative Receiver (chapter 1.6) 3884 2009-12-20 15:38:30 patt896 3 Lodestone Formers Group Purchase for Star and CDG2000 Builders 3882 2009-12-18 04:11:04 Ashhar Farhan 2 Errata - DTC sidebar on 3.14 3880 2009-12-17 20:33:55 Ken Evans 2 FDIM 2010 QRP Challenge Clarification 3854 2009-12-12 12:13:34 tetranz 16 Replacement for 2SC5739 ? 3851 2009-12-12 07:55:46 Tayloe Dan-P26412 10 Re: The most noiseless opamp available 3850 2009-12-12 05:23:44 Kenneth Stringham 4 FDIM Challenge 3848 2009-12-09 10:37:37 Ken Evans 2 FDIM 2010 Challenge 3847 2009-12-01 11:42:17 w7loz 1 Post script on the 20m vxo transmitter from EMRFD 3840 2009-11-27 22:31:45 Ashhar Farhan 2 Very Maximum Sideband Keying - really? 3826 2009-11-27 10:05:04 w4zcb 1 Re: Off Topic: Re: Ancient FT-243 Xtal Circuits? 3806 2009-11-25 13:37:05 w7loz 3 Question: VXO 20 meter QRP transmitter from EMRFD 3801 2009-11-24 09:18:59 c6alk 40 Ancient FT-243 Xtal Circuits? 3800 2009-11-23 06:12:26 Tom 1 Bit-O-Bitx 3787 2009-11-19 16:42:24 chrisethompson 8 Micro R2 Op amp stages 3782 2009-11-18 17:16:16 joop_l 2 Rock bending 3780 2009-11-17 10:40:33 ter753 1 re- LT5517 mixer 3778 2009-11-16 07:47:43 ter753 3 LT5517 mixer 3777 2009-11-16 06:56:00 Alan Melia 1 Re Re: Great Learning Site 3768 2009-11-13 19:04:28 popmedkoh 8 Great Learning Site 3766 2009-11-12 08:58:38 John Clement 2 RE An Improved RF Generator Gain Blocks 3763 2009-11-11 10:39:27 Tom 1 Bit of Bitx 3761 2009-11-10 07:20:42 bkopski 2 AN IMPROVED RF BENCH GENERATOR 3754 2009-11-08 17:22:55 st2nh 3 uc734b datasheet ? 3749 2009-11-08 09:23:39 WA0ITP 8 PNP Switch 3748 2009-11-07 12:29:21 KK7B 2 Single supply op-amps 3740 2009-11-05 13:10:50 ha5rxz 6 Power Taps & Converting RMS Volts to Watts 3735 2009-11-05 09:38:35 David 4 DeMaw Design Equation 3727 2009-11-03 11:27:23 Pat Villani 10 Digital mixers and impedance matching 3726 2009-11-03 09:35:19 eldonb46 2 Art for Low Noise Audio Chain? 3716 2009-11-02 11:22:16 w1kilofoxtrot 7 LTSpice IV and filter design for R2/T2 Pro project 3714 2009-11-01 05:14:07 Kenneth Stringham 2 Use of Patented Material 3708 2009-10-31 08:59:24 magicnickus 6 Patents and ham radio 3694 2009-10-30 11:56:14 chrisethompson 14 USB Oscilloscope 3653 2009-10-24 15:31:13 chrisethompson 2 Trouble with EMRFD amplifier 3648 2009-10-24 07:12:31 Tom 3 MDS 3640 2009-10-23 21:58:24 Gary 39 How Receivers Sound 3635 2009-10-23 08:56:07 Colin 16 Mixers 3626 2009-10-22 10:43:25 Glen Leinweber 11 IP3 specs , mixer specs 3621 2009-10-21 14:47:01 Dino Papas 12 Solid State Design for the Radio Amateur 3620 2009-10-18 15:32:46 Tim 1 Link-Coupled Tuner 3618 2009-10-15 07:31:28 Kenneth Stringham 2 Mixer Level 3610 2009-10-13 13:04:59 ha5rxz 4 Power Taps 3609 2009-10-12 22:45:46 Vincenzo Calandra 5 A question abot level 3606 2009-10-09 14:12:32 Stephen Wandling 3 Ferrite tubes, Binocular cores and Ferrite toroids 3595 2009-10-05 09:59:19 john 1 ADE-1 Mixer post 3594 2009-10-05 09:53:44 john 8 ADE-1 Mixers 3592 2009-10-04 16:29:23 Tom 4 SSB QRP transmitter 3586 2009-09-30 06:19:08 VU3AUZ 1 Motorola SM50 programming 3583 2009-09-29 12:31:45 joop_l 7 RF current transformer 3581 2009-09-27 22:37:35 soti_156 4 Poor man spectrum analyzer 3574 2009-09-26 21:30:30 Ashhar Farhan 7 Cognitive Radio. What is it? 3569 2009-09-26 02:38:28 ha5rxz 6 NBFM 3560 2009-09-22 16:08:44 Ross 7 Ham radio brainstorm 3559 2009-09-22 15:22:39 Stephen Wandling 3 Looking for transistors 3557 2009-09-22 12:15:11 Dino Papas 2 Re: Noise Generator Diodes 3542 2009-09-14 05:00:04 hanssummers2000 4 Microcontroller clock frequency 3541 2009-09-10 13:53:36 i7swx 1 INRAD WILL ADD TMP CONNECTORS KITS TO THEIR PRODUCTS LIST 3540 2009-09-10 10:00:34 jmlcs2000 5 Frequency Counter Chapter 4 3539 2009-09-07 09:11:46 Kenneth Stringham 1 [RE] Twisted Pair Transformers with resonator 3536 2009-09-05 09:24:22 Kenneth Stringham 3 Re: Twisted Pair Transformers 3528 2009-09-04 03:15:34 michael taylor 4 hi,Friend!! 3513 2009-09-02 06:43:07 w1kilofoxtrot 18 Measuring wideband twisted wire transformers 3509 2009-08-31 05:57:36 timshoppa 5 Theory/modeling of regenerative detectors 3498 2009-08-25 08:46:50 g3xaq 1 Super VXO phase noise 3493 2009-08-22 19:30:04 iq_rx 13 A Good Old VFO 3489 2009-08-20 06:59:14 timshoppa 2 The best QSK - how to replicate 3485 2009-08-18 23:50:28 ashhar_farhan 4 Si570 3473 2009-08-14 12:37:40 timshoppa 5 Musings on S-Meter readings 3470 2009-08-12 22:31:27 Rick 11 Regens etc. 3469 2009-08-11 08:38:47 Giancarlo 1 A new analog switch 3438 2009-08-07 21:14:40 rcbuckiii 29 General Coverage Receiver 3424 2009-08-04 05:32:31 Luke Enriquez 1 RF Parts Parts for sale 3422 2009-08-04 00:20:30 David Craggs 11 Quadrature hybrid 3417 2009-08-03 15:11:30 Tom Hall 1 HYCAS 3392 2009-08-01 01:13:55 Weddig, Henning-C... 2 AW: [emrfd] Re: Measuring Crystal Parameters 3372 2009-07-30 08:37:45 Steve 3 RF bridge and VNA 3359 2009-07-29 15:27:11 Jim Miller 13 supersonic mic? 3355 2009-07-29 08:18:47 timshoppa 1 Revised First Edition? 3348 2009-07-29 04:44:45 Alan Melia 1 . homebrew 3346 2009-07-28 19:21:52 Rick 3 homebrew 3339 2009-07-26 10:17:29 Phil Sittner 61 Measuring Crystal Parameters 3336 2009-07-19 13:13:46 Vojtěch Bubník 2 current mirror as a current sink for LM317? 3330 2009-07-16 19:42:12 Phil Sittner 1 Fw: measuring crystal parameters 3327 2009-07-16 14:46:41 richj_focus 2 power supply filtering 3304 2009-07-13 11:53:53 bkopski 1 Experiments with a Calibrated Noise Source 3303 2009-07-12 15:37:07 gt25psi2002 30 Changing position between a mixer's pad and diplexer? 3301 2009-07-12 09:37:23 Tom Hall 2 Popcorn DC receiver 3286 2009-07-01 11:38:27 Ashhar Farhan 9 The importance Q in a matching network 3275 2009-06-30 12:56:34 Ashhar Farhan 4 JBOT - Just a bunch of transistors as a linear amp. 3267 2009-06-30 10:28:56 timshoppa 11 Photographing/documenting dead-bug construction 3266 2009-06-30 10:01:34 timshoppa 3 Measuring noise in front-end pre-amps and mixers 3261 2009-06-29 14:56:17 bkopski 1 An Easy Magnet Wire Storage Method 3260 2009-06-29 09:48:04 Chip Owens 7 Wanted: 1750 kHz crystals and / or crystal filter 3256 2009-06-28 09:33:26 chuck adams 4 Measurements of k and M for transformers 3249 2009-06-28 06:58:17 bkopski 11 SOME OBSERVATIONS ON TOROIDAL TRANSFORMERS 3244 2009-06-27 20:01:47 Paul Anderson 8 Wobulator? 3239 2009-06-26 13:12:22 Wes Hayward 2 Matched amplifiers for BITX 3238 2009-06-24 16:29:09 Glen Leinweber 1 Re: Tunnel Diodes? 3232 2009-06-21 18:04:48 Vojtěch Bubník 8 balanced antenna with unbalanced tuner & balun? 3219 2009-06-19 08:02:11 vicker40 2 Re; Tunnel Diodes 3218 2009-06-19 06:48:54 chrisethompson 7 First Transmitter 3200 2009-06-17 17:45:11 Paul Anderson 23 Tunnel diodes? 3197 2009-06-17 09:37:35 Ashhar Farhan 2 Mounting old variable capacitors et al 3193 2009-06-17 02:22:56 ne0xron 4 ic unobtanium 3191 2009-06-15 06:25:52 rotfunkblau 2 Xtal Frequency Shifting (your own xtal frequency) 3190 2009-06-15 06:25:42 Alan Melia 1 Ceraminc resonator VXOs 3183 2009-06-11 22:09:10 n2toh 3 Dealing with a dirty output from an Analog Devices AD8954 DDS chip 3182 2009-06-11 17:25:44 Bill Pileggi 2 HP8640B technical manual downloads 3177 2009-06-10 22:28:14 Markus Hansen 1 Re: Digest Number 844 3176 2009-06-10 22:28:09 Markus Hansen 2 RE the HP8640B 3172 2009-06-10 10:42:26 Glen Leinweber 3 I.F. amplifier (AGC) 3166 2009-06-09 07:16:35 Kenneth Stringham 8 Hp 8640 Generator 3163 2009-06-08 14:15:28 richj_focus 2 HP 8640B 3162 2009-06-08 11:56:41 Eduardo Alonso 4 minimum parts transceivers presentation available 3158 2009-06-07 00:19:03 Tharks V 1 Electronics circuits 3153 2009-06-06 14:47:05 david gauding 1 Re: Inductors components of dipole elements questions 3152 2009-06-06 12:30:14 Stan 4 Inductors as components of dipole elements questions 3137 2009-06-03 14:33:21 timshoppa 8 WA2EBY IRF510 MOSFET Amp 3136 2009-06-03 11:23:59 Stephen Wandling 17 Crystals, Ceramic Resonators and VXOs 3135 2009-05-27 09:30:16 ha5rxz 2 Thank You 3112 2009-05-24 08:59:07 Dino Papas 1 SolderSmoke Book Available with a Discount Today 3110 2009-05-24 08:44:15 WA0ITP 5 Quiet Regulators 3109 2009-05-24 07:34:39 Chris Trask 19 Re: Driving Mixers 3108 2009-05-24 06:11:01 Kenneth Stringham 1 Ratios in Bels 3089 2009-05-23 07:58:25 Kenneth Stringham 1 50dBmV in 75 Ohms 3088 2009-05-23 07:37:47 Kenneth Stringham 2 Power Ratios 3070 2009-05-21 07:02:02 Kenneth Stringham 8 dBxxx Relationships 3067 2009-05-20 17:50:36 richj_focus 3 wire 3065 2009-05-20 13:24:14 Kenneth Stringham 3 75ohm Input Amplifier in 50 System 3056 2009-05-19 01:41:28 ha5rxz 13 Conversion Between 75 Ohm and 50 Ohm Systems 3034 2009-05-15 19:39:42 gt25psi2002 1 SWL - SSB of DSB 3027 2009-05-13 12:11:09 Glen Leinweber 5 xtal filter tuning 3025 2009-05-13 06:24:00 w1kilofoxtrot 3 Buffer amplifier distortion 3018 2009-05-12 06:56:21 Kenneth Stringham 51 Mixer Purity 3013 2009-05-11 14:01:26 Bill Kelsey - N8E... 1 Kanga US Dayton Update 3009 2009-05-11 10:53:31 timshoppa 2 Is a diode DBM naturally 50 ohms? 3007 2009-05-11 04:26:21 dombaines 1 TFM-335 mixer 3003 2009-05-10 17:42:26 Kenneth Stringham 2 Purifying Mixers 2997 2009-05-08 21:21:51 gt25psi2002 15 How to purify the LO 's harmonics and sub-harmonics? 2996 2009-05-08 12:51:39 Steve, G4GXL 1 OT: FDIM 2009 - Online Registration Closing Soon 2983 2009-05-05 17:11:42 Glen L. 1 attenuators using 33 ohm resistor networks 2981 2009-05-04 04:36:06 Stan 2 Balanced Mixers advantages or disadvantages 2980 2009-05-03 18:33:33 Bill Kelsey - N8E... 1 Kanga US at Dayton - new products and book special 2966 2009-04-30 03:57:52 gt25psi2002 3 Experimental Methods in RF Design - PDF Format? 2962 2009-04-29 20:07:52 gt25psi2002 19 How to measure input/output impedance of any IF filter? 2957 2009-04-29 01:24:31 Ashhar Farhan 12 MIT Rad lab journals 2954 2009-04-27 01:14:30 g3zoh 4 EMRFD Book For Sale 2949 2009-04-23 21:35:07 chuck adams 5 EMRFD 1.3 [long] 2948 2009-04-22 13:19:40 Jim Stafford 1 Four Days In May (FDIM) 2941 2009-04-19 20:34:44 gt25psi2002 6 Hybrid (90 deg module type)'s Formula? 2940 2009-04-19 17:55:59 klopfensteinrex 1 Crystal Resolution Filter 2938 2009-04-19 09:03:04 joop_l 1 Power attenuator, which side is which? 2936 2009-04-18 18:19:23 Gary Johnson 4 Review: Multisim, Analog Devices Ed. (Free) 2934 2009-04-15 20:05:17 Dave - WB6DHW 1 UHFSDR Assembly Manual 2928 2009-04-14 20:53:48 w4zcb77 1 Selsyns 2927 2009-04-14 20:11:23 Bill Kelsey - N8E... 4 TUF-3 2920 2009-04-13 10:15:03 rjtmkiii 5 TUF-3 supplier? 2915 2009-04-11 16:53:24 Justin Giles-Clar... 1 "The Gnat" in VK7 2914 2009-04-11 09:37:33 n1vwd 1 Re: Resistors in small quantities THANK YOU 2907 2009-04-10 11:49:01 Stephen Wandling 3 Choosing capacitors 2905 2009-04-10 10:23:52 w2ads 6 Which capacitor technology to use? 2892 2009-04-09 05:43:42 n1vwd 5 Resistors in small quantities 2887 2009-04-08 16:54:23 Phil Sittner 11 Crystal Sourcing 2884 2009-04-08 04:01:33 Vaclav Peroutka 1 HF PA finals - tradeoffs 2878 2009-04-07 12:15:50 ha5rxz 18 Transformer Slow Start Circuit 2873 2009-04-06 12:06:46 Stan 3 Toroid link coil placing question 2871 2009-04-05 17:22:18 Jason Milldrum 1 LADPAC installation trouble 2870 2009-04-05 15:04:41 Stephen Wandling 2 [Fwd: [emrfd] MOSQUITO, a QRPn SDR MOSFET TRANSCEIVER] 2863 2009-04-04 08:10:27 Mike Czuhajewski 4 Less than stellar publishing quality 2861 2009-04-03 23:48:06 chuck adams 2 EMRFD Revised First Editon 2858 2009-04-03 14:12:48 Phil Sittner 3 30khz resolution filter-W7ZOI/K7TAU SA 2846 2009-04-02 20:50:18 JT Croteau 6 Toroid Mixtures for VFOs 2843 2009-04-02 14:35:31 jr_dakota 4 OT: Sun has fewest sunspots since 1913, better GPS 2838 2009-04-02 13:18:46 Ashhar Farhan 10 end of qrp? really! 2837 2009-04-01 11:53:52 Stephen Wandling 1 Antennex/Cebik list 2833 2009-03-31 09:23:18 Art 1 Re: Check out my photos on Facebook 2828 2009-03-30 12:28:30 Stephen Wandling 3 A 6L6 lasted forever! 2820 2009-03-30 05:38:11 Mauro Martins 1 emrfd-unsubscribe@yahoogroups.com 2819 2009-03-29 22:21:05 Ashhar Farhan 7 A question on transmatch 2815 2009-03-29 17:04:04 Chris Trask 4 The Solder Wick Chronicles, Part 2: Updated Noise Blanker 2808 2009-03-27 18:04:44 bignick73_2000 9 noob questions on building a tiny tornado 2807 2009-03-27 17:34:48 Steve, G4GXL 1 OT - Dayton and 'Four Days In May' 2777 2009-03-24 12:28:00 Chris Trask 31 The Solder Wick Chronicles, Part 1: The Iron, the Bench, and the Sco 2776 2009-03-24 03:19:19 f2dc2003 1 SAN2PC and Drawsan new release 2775 2009-03-21 13:13:05 Eduardo Alonso 5 MOSQUITO, a QRPn SDR MOSFET TRANSCEIVER 2762 2009-03-08 15:26:50 rcbuckiii 5 QEX back issue 2759 2009-03-04 12:30:47 timshoppa 11 Sheet metal techniques for radio cabinets 2753 2009-03-03 12:41:33 Art 6 winding binocular cores 2752 2009-03-03 11:54:35 Dino Papas 1 Expanded QST Article - Designing & Building Transistor Power Amplifi 2749 2009-02-27 12:30:13 Wes Hayward 2 Setup File 2744 2009-02-26 17:57:57 David Siegrist 4 nescaf notch filter 2743 2009-02-26 04:57:49 Vojtěch Bubník 1 rf power measurement? 2741 2009-02-25 19:20:49 Wes Hayward 1 Another Software Bug 2740 2009-02-25 19:09:22 Sam Morgan 2 NEScaf modification for notch filter 2738 2009-02-24 15:00:02 Wes Hayward 1 Softward Bug 2737 2009-02-23 15:05:59 lownslow1601 1 EMRFD new printing 2731 2009-02-22 12:03:20 Wes Hayward 8 New softward for EMRFD readers. 2724 2009-02-21 19:20:45 David 8 Good price on EMRFD* 2719 2009-02-20 16:39:26 groups@kd5ssj.com 1 Status of Spring Group Buy of Mini-Circuits 2715 2009-02-20 14:48:48 Eduardo Alonso 2 GNAT 1/40 2714 2009-02-20 13:53:02 Chris Bryant 3 Scotty spectrum analyser group buy 2712 2009-02-20 06:46:03 Geoff Pike 2 BD135 /BD139 2709 2009-02-19 05:15:17 Eduardo Alonso 2 Bipolar RF Transistor for FLEA TRX 2703 2009-02-15 15:07:15 Ketner, Kenneth 7 Comments on PULGA Flea minimal xcvr 2696 2009-02-13 10:31:01 geoff.n.robinson@... 4 TOKO Coils 2694 2009-02-13 06:20:38 Vojtěch Bubník 3 oscillator stability, VFO-BFO stability? 2692 2009-02-11 18:44:43 Dave - WB6DHW 1 UHFSDR L2 and L3 part change 2684 2009-02-09 11:37:18 timshoppa 11 Relay switching of band filters 2681 2009-02-07 06:09:29 Kenneth Stringham 2 QRP Categories 2671 2009-02-04 13:36:27 trabem mebart 5 BS-170 PA heatsink 2670 2009-02-04 10:55:55 Rick 7 QRPs 2667 2009-02-02 13:36:36 Dave - WB6DHW 1 9912 board schematic 2665 2009-01-31 18:43:01 la3pna 3 Filter design. 2663 2009-01-30 20:27:06 Dave - WB6DHW 1 UHFSDR pre-producton 2658 2009-01-30 01:56:37 Dave - WB6DHW 1 UHFSDR Hittite replacements 2657 2009-01-29 19:53:20 Steve 2 Crystal resistance measurements -- follow up 2650 2009-01-28 14:23:44 rjtmkiii 7 Causes of Hartley harmonics? 2648 2009-01-28 07:03:38 Dino Papas 4 Solid State Design for the Radio Amateur on eBay 2646 2009-01-27 03:19:49 jr_dakota 1 Comprehensive Paper On Opamp Distortion 2642 2009-01-26 10:11:01 bkopski 6 ADVISORY: AD 8307 in Power Meter Applications 2637 2009-01-24 17:44:41 Dave - WB6DHW 2 QST Surface Mount Article 2627 2009-01-23 22:20:24 Steve 12 Manipulating complex numbers 2624 2009-01-23 14:32:50 Ivan Rogers 2 Basic Low Pass Filter Design 2622 2009-01-22 18:14:36 ka3j12 4 DAC Control of VCO 2611 2009-01-20 18:02:12 Steve 11 Crystal resistance measurements 2610 2009-01-19 01:40:33 Dave - WB6DHW 1 QST Surface-Mount article 2609 2009-01-19 00:01:17 Dave - WB6DHW 1 AD9912 DDS Webpage Update 2605 2009-01-18 06:22:59 Steve 3 Shielded inductors 2603 2009-01-17 22:53:10 Baruch Zilbershat... 1 OT: Agilent shaft encoder. 2599 2009-01-17 15:39:51 ha5rxz 2 Power Supply Heatsink Temperature 2595 2009-01-17 06:07:44 Kenneth Stringham 7 %20Re%3Afeed%20through%20caps%20and%20multi-hole%20aperture%20core%2 2594 2009-01-16 19:14:34 Sam Morgan 2 feed through caps and multi-hole aperture core ferrite beads 2593 2009-01-14 10:41:34 timshoppa 1 Computer or DSP broadband demodulation (e.g. CW Skimmer) 2592 2009-01-14 01:29:33 Dave - WB6DHW 1 KW Diplexer Boards 2589 2009-01-11 06:10:33 joop_l 3 Loaded Q and the amount of negative resistance 2586 2009-01-10 00:00:06 Dave - WB6DHW 1 Re: Opto Circuit 2585 2009-01-09 20:33:02 Dave - WB6DHW 1 UHFSDR Opto Isolator Circuit 2571 2009-01-04 01:34:07 w4zcb77 1 MMIC's (Reasonably long) 2564 2009-01-03 12:58:04 Niels A. Moseley 22 100uH RF chokes - how to make them? 2556 2009-01-01 09:25:35 joe price 12 Noise Generator 2555 2008-12-30 21:37:58 Roger Hayward 1 Moderation and delayed posts 2542 2008-12-30 12:13:37 Leon Heller 7 Missing posts 2540 2008-12-30 11:14:21 joop_l 1 Equal inductor low pass filter - name? 2537 2008-12-30 10:19:46 rjtmkiii 2 UVFO question 2536 2008-12-30 09:29:51 rcbuckiii 6 VFO output level 2532 2008-12-30 06:01:42 Kenneth Stringham 2 Differential LO Drive 2513 2008-12-19 23:37:42 rcbuckiii 17 Measuring extremely small value inductors 2510 2008-12-18 08:51:42 patt896 1 Lodestone Former Group Purchase for CDG2000, Star or other BPF 2506 2008-12-14 15:03:37 Art 3 SMT component exchange mailing list 2505 2008-12-14 11:56:07 Giancarlo 3 PA3AKE Project Update - DDS 2492 2008-12-12 02:16:44 David Brainerd 11 Differential squarewave drive for DBM 2491 2008-12-11 21:10:57 Bill - N8ET 1 Kanga US update and Christmas special offer 2490 2008-12-11 12:32:54 Benny Aumala 3 Binaural / Pseudo Stereo 2486 2008-12-10 16:56:22 ka3j12 2 74HC4053 mixer vs passive ring diode (ADE-1, TUF-1) 2482 2008-12-09 18:18:47 Rick 8 Binaural Radio 2475 2008-12-08 16:38:29 Ashhar Farhan 3 Binaural Audio - Off Topic 2468 2008-12-07 22:26:31 Stephen Wandling 10 EA3FXF & EA3GHS and the Pulga 2467 2008-12-02 16:44:34 Henry 3 HR Article 2465 2008-12-01 11:42:07 timshoppa 2 Linear-tuning VFO's 2458 2008-11-29 09:18:01 WA0ITP 4 Crystal Size for VXO 2457 2008-11-29 08:11:59 Paul 5 Thanks for HR article ! 2452 2008-11-27 10:00:41 Paul 4 looking for old HR article on linear tuning 2451 2008-11-27 10:00:37 timshoppa 3 Birdies... coming through the crystal filter, or radiation, or ??? 2446 2008-11-25 21:14:51 Ashhar Farhan 5 Picastar 2441 2008-11-24 15:31:29 Michael Dunn 9 FREE Simulation software 2440 2008-11-24 10:27:20 Roger Hayward 1 Hybrid Cascode IF Amplifier Kitlets back in stock 2434 2008-11-21 21:28:58 cwfingertalker 6 "Buzzy" FET mute switch 2430 2008-11-19 22:40:35 lownslow1601 2 ID Codes on SMT Components 2423 2008-11-18 15:02:13 wb7dmx 1 soldering smt devices 2421 2008-11-18 14:43:05 bob_5b4agn 2 Re: Soldering Fine Pitch SMD - Sorry but this is long. 2419 2008-11-18 14:42:40 ha5rxz 7 PLL Will Not Lock 2401 2008-11-13 13:29:57 brainerd@wildblue... 1 9912 Assembly Manual Error 2390 2008-11-11 20:56:20 chris_yipyap_com 6 Figure 3.31 - single crystal filter 2385 2008-11-11 19:08:13 Kenneth Stringham 2 DDS/Micro Noise 2382 2008-11-11 08:33:40 la3pna 9 Microprocessor noise in receiver IF 2380 2008-11-11 07:32:52 Paul Anderson 21 Substituting for a 2N2222? 2376 2008-11-10 13:25:16 rcbuckiii 5 Oscillator issue 2375 2008-11-09 07:27:05 G3XBM 1 New 80m micro-transceivers on my QRP website 2372 2008-11-08 16:23:32 Michael Dunn 3 Stupid filter question 2371 2008-11-07 01:44:17 brainerd@wildblue... 1 RLC_Meter Prototype Boards 2368 2008-11-05 00:05:01 brainerd@wildblue... 2 RLC_Meter 2362 2008-11-04 02:30:36 brainerd@wildblue... 1 KW Diplexer and QSE boards 2359 2008-11-03 19:34:37 WA0ITP 1 S7C Simple Superhet 2350 2008-11-02 06:01:58 bkopski 16 Q MULTIPLIER QUESTION 2349 2008-11-01 21:09:57 brainerd@wildblue... 1 RLC_Meter BOM 2347 2008-11-01 17:43:26 Art 1 UHF SDR beta kit status 2345 2008-11-01 16:50:38 Roger Hayward 1 Hybrid Cascode Amplifier Re-Kitting 2344 2008-10-31 19:16:51 WA0ITP 4 MK-II Updated Universal QRPTransmitter 2342 2008-10-31 10:29:44 aisea6 1 re FLEA trx 2339 2008-10-29 13:23:31 timshoppa 1 Dual-receive circuitry 2334 2008-10-28 11:23:52 Tom Hall 6 Re: K5IRK/W7ZOI Receiver 2332 2008-10-27 18:30:14 ken_ketner2 2 Hello, and FLEA question 2324 2008-10-27 02:45:50 kklonk 1 KISS-transceiver 2323 2008-10-27 00:41:12 brainerd@wildblue... 1 UHFSDR BOM 2322 2008-10-26 19:51:37 brainerd@wildblue... 7 New Protype boards 2316 2008-10-25 08:52:10 rotfunkblau 4 IP3 Simulation with Spice 2313 2008-10-24 15:50:47 Roger Hayward 1 Hybrid Cascode IF Amplifier Parts Kits 2312 2008-10-24 15:49:17 kcmuthumani 4 Rotary Encoder interface for serial / lpt port 2311 2008-10-24 15:49:17 timshoppa 4 Multiband LO chain final incarnation 2309 2008-10-24 00:08:00 brainerd@wildblue... 1 New Prototype Boards on Order 2292 2008-10-20 10:37:34 ve7ca2 8 LM387 2285 2008-10-19 08:58:05 bkopski 11 AN ANTIQUE RADIO TECHNIQUE QUERY 2271 2008-10-17 08:43:17 bkopski 1 250 MHz SA ADAPTOR ( SA-A) 2269 2008-10-17 05:19:39 ea3ghs 16 the flea, a 40m minimalist transceiver 2268 2008-10-17 01:09:56 Heikki Ahola (OH... 1 Carrier oscillator drift revisited 2264 2008-10-16 18:13:00 timshoppa 15 Observations of oscillator output waveforms - some with mucho distor 2262 2008-10-16 12:30:23 Robert Cerreto 2 Fw: Crystal Reality Check Please 2258 2008-10-15 18:50:40 Art 1 billet aluminum project boxes for sale 2248 2008-10-14 21:19:27 Kevin Wheatley 7 VCXO problems 2247 2008-10-14 21:19:27 rcbuckiii 10 I need L-C filter suggestions 2246 2008-10-14 19:55:11 Wes Hayward 1 Simple bandpass filters 2243 2008-10-14 07:23:40 ha5rxz 3 Picture of Manhattan PCB Now Downloaded 2240 2008-10-13 11:31:46 ha5rxz 1 Attention Manhattan Constructors 2239 2008-10-13 11:31:26 ha5rxz 1 Capacitor Values For The Vackar Oscillator 2231 2008-10-12 00:25:00 Ashhar Farhan 6 Audio DDS as a reference for PLL 2228 2008-10-10 23:27:03 brainerd@wildblue... 1 UHFSDR optoisolateos 2227 2008-10-10 18:43:30 Michael Dunn 1 Professional design service available 2225 2008-10-10 12:56:26 brainerd@wildblue... 2 UHFSDR Opto couper 2224 2008-10-09 20:48:04 brainerd@wildblue... 1 UHFSDR board PDF file 2216 2008-10-09 01:29:10 brainerd@wildblue... 9 UHFSDR 2213 2008-10-08 19:23:18 Nick Kennedy 2 first sound ... 2212 2008-10-08 15:16:20 timshoppa 3 K2 design impressions 2200 2008-10-06 17:50:36 Mark 5 getting pc board resist spray 2194 2008-10-06 11:06:06 rcbuckiii 11 Frequency Counter Calibration 2192 2008-10-06 11:05:27 Glen Leinweber 3 LM386 noise 2190 2008-10-06 07:46:15 timshoppa 2 Evolving my multiband LO chain, G3ROO/GM4ZNX PLL, HC4046 vs HCT9046 2186 2008-10-04 19:37:56 Hari G 4 4cx250 heater 2182 2008-10-04 09:03:40 Geoff Pike 1 Wide band overtone xtal filter 2171 2008-10-03 09:29:20 timshoppa 3 TDA1013B 2169 2008-10-03 09:29:17 Ashhar Farhan 11 can any on er .. running a 4cx250b qrp? 2167 2008-10-02 23:15:36 jr_dakota 1 A Question On Cleaning Up A Variable Tuning Cap 2158 2008-10-01 19:25:46 rcbuckiii 12 Crystal Filter Sweeper 2144 2008-09-28 20:44:32 timshoppa 5 Critique my hypothetical multiband LO setup 2140 2008-09-28 08:19:02 cwfingertalker 15 LM-386 Bypass Question. 2135 2008-09-26 06:33:30 Eduardo Alonso 1 micro R1 receiver with RA3AAE mixer // CAPACITIVE COUPLING 2134 2008-09-26 05:06:38 bkopski 8 AD8307 AT LOW FREQUENCY 2128 2008-09-25 06:10:12 Heikki Ahola (OH... 6 Carrier oscillator drift 2125 2008-09-24 14:10:41 David Brainerd 3 matching for RF amps 2113 2008-09-23 07:06:08 timshoppa 8 Filtering simple LO's or BFO's? 2110 2008-09-23 02:32:28 ter753 1 MICRO R1 2103 2008-09-22 09:43:17 ter753 6 micro R1 receiver 2090 2008-09-20 01:34:56 brainerd@wildblue... 4 UHF-SDR Transceiver 2089 2008-09-19 22:25:55 kerrypwr 18 Crystal Filter Failures 2086 2008-09-18 08:11:37 bkopski 2 NEW 0LD TOOL FAVORITE 2083 2008-09-17 17:03:18 David Brainerd 2 1.8 to 450 MHz Amp 2076 2008-09-15 13:15:34 Alan Melia 4 BFO and LO isolation ? 2070 2008-09-15 07:44:54 cwfingertalker 1 QRP Afield 9/20/08 2065 2008-09-14 15:38:49 Weddig, Henning-C... 2 AW: [emrfd] BFO Feedthrough into IF 2060 2008-09-14 08:50:46 timshoppa 13 BFO Feedthrough into IF 2059 2008-09-14 08:50:36 ha5rxz 3 1N4007 in SMT? 2051 2008-09-11 20:37:51 Rick 3 Simple Projects 2048 2008-09-11 13:03:24 Giancarlo 6 nxp_rf_manual_11th_edition available 2036 2008-09-09 09:55:59 orbanp1 4 BF225 transistor data 2035 2008-09-09 09:55:51 Chris Craig 2 Feed thru caps use on VFO 2029 2008-09-08 03:53:09 timshoppa 11 Crystal filter success! Now matching to a homebrew RX. 2027 2008-09-07 21:43:05 David Brainerd 3 DBM driven by PECL 2023 2008-09-07 18:01:04 brian_vandewetter... 9 EMRFD Signal Generator Extender fig 7.28 2013 2008-09-06 11:22:34 bkopski 9 PISTON CAPACITOR FOLLOWUP 2008 2008-09-06 00:39:56 richj_focus 5 Direct Conversion Radio 2004 2008-09-05 09:20:36 ha5rxz 5 Debugging The Hilberling PT-8000 Preselector 2000 2008-09-04 13:48:26 timshoppa 3 GPLA for plotting group delay? 1998 2008-09-03 13:15:52 timshoppa 3 Gaussian or Equiripple filters with real crystals beyond Zverev? 1997 2008-08-30 17:52:36 bkopski 2 HOME BREW PISTON CAPACITOR 1993 2008-08-29 08:56:17 jmlcs2000 4 Sources of wire for coils 1987 2008-08-25 17:40:42 Glen Leinweber 2 Codec undersampling question 1982 2008-08-21 19:04:28 rcbuckiii 7 400 MHz VCO 1976 2008-08-20 10:37:26 Glen Leinweber 3 Oscillator topology Questions 1975 2008-08-20 10:21:52 bkopski 2 ADD REACH TO THE AADE LC METER 1973 2008-08-20 02:52:49 Rick 2 High Voltage Transmitters 1971 2008-08-19 07:17:09 Geoff Pike 1 Low voltage transmitters 1963 2008-08-17 18:38:03 Jim Miller 5 Approaches for low voltage transmitters? 1943 2008-08-14 13:39:15 wk73ch 7 portable Spectrum analyzer 1940 2008-08-14 10:57:21 gi0gdp 18 IC Audio amps vs Discrete 1933 2008-08-13 05:37:35 wb7dmx 1 help 1931 2008-08-12 22:03:27 wb7dmx 1 I need help with this 1929 2008-08-12 14:54:52 WA0ITP 10 IC Audio Amps. Was EMRFD Fig 1.17 Audio amp 1923 2008-08-12 00:14:40 Adrian Scripca 4 Hybrid Cascode IF Amplifier input network questions 1920 2008-08-11 17:28:31 Art 6 auto power off circuit? 1902 2008-08-07 18:49:21 Craig Johnson, AA... 20 EMRFD Fig 1.17 Audio amp 1887 2008-08-06 22:03:38 chuck adams 1 DSO-XXXX test software 1882 2008-08-06 15:53:47 chuck adams 1 DSO2250 1881 2008-08-06 15:50:52 chuck adams 1 DSO2250 system requirements 1876 2008-08-06 11:11:37 wb7dmx 10 scope test 1863 2008-08-06 07:35:21 Steve Ratzlaff 13 Re: scope (DSO 2250) 1861 2008-08-05 22:10:12 wb7dmx 13 scope 1860 2008-08-04 12:09:44 Henry 1 An Absortive Notch Filter 1859 2008-08-04 11:31:27 Alan Melia 1 re Digest Number 589...notch filter 1857 2008-08-03 21:44:57 Alan Melia 2 Fw: [emrfd] Digest Number 589 1856 2008-08-02 18:11:10 wimmie262000 3 DC-compensated notch filter 1854 2008-08-02 06:17:41 richj_focus 3 R2 PRo boards 1851 2008-07-30 23:31:13 chuck adams 1 Digital Storage Oscilloscopes 1849 2008-07-30 18:12:54 bkopski 1 AN HB 100 mHz RF SWEEP GENERATOR UPDATE 1846 2008-07-30 11:28:46 wb7dmx 5 FFT 1835 2008-07-26 21:15:11 yo8can 4 Push pull amplifier 1831 2008-07-22 18:59:07 svss_editor 1 binaural CW reception sample? 1830 2008-07-22 18:58:59 Glen Leinweber 1 J310 lead frame heatsinking question 1826 2008-07-22 10:09:40 Stan 11 push pull amplifier output questiion 1820 2008-07-19 17:23:10 Glen Leinweber 1 AD8307 power meter shielding 1819 2008-07-19 09:32:19 bkopski 7 A HB 100 mHz RF Sweep Generator 1816 2008-07-14 21:42:55 chuck adams 1 Free Handbook 1814 2008-07-14 16:23:25 Glen Leinweber 3 HF noise sources 1811 2008-07-14 07:14:10 peepholenz 6 DG Mosfets 1799 2008-07-11 08:55:51 geoffrey pike 2 DGMFs 1790 2008-07-09 17:08:15 Jason Milldrum 16 Noise Figure Measurement without a Spectrum Analyzer 1786 2008-07-09 05:19:45 Jason Milldrum 6 Dual Gate MOSFET Amp - Gain and AGC 1777 2008-07-04 21:29:10 Wes Hayward 9 Quartz Crystals 1763 2008-07-01 18:02:32 wb7dmx 5 digital scope 1741 2008-06-24 03:36:24 Jason Milldrum 3 Dual Gate MOSFET Biasing 1738 2008-06-23 08:42:52 bkopski 4 A TRANSFORMER-LESS AND FEEDBACK-LESS WIDEBAND AMPLIFIER 1736 2008-06-21 23:37:17 Rick 1 Link Coupling 1735 2008-06-21 21:53:17 la3pna 2 Expected loss in TTC 1730 2008-06-19 15:20:35 bkopski 1 SUPER TUNABLE TRAP 1727 2008-06-19 09:44:36 Pat Bunn 1 BFR 91 Source 1726 2008-06-19 01:57:24 Stan 4 Link coupled output question REF Solid State Design page 25 1725 2008-06-18 17:50:47 Glen Leinweber 23 crystal pkg for LSB ladder filter 1714 2008-06-16 08:25:41 cwfingertalker 3 VFO toroid phase splitter 1707 2008-06-14 19:02:20 rcbuckiii 12 Advanced VHF Wattmeter 1703 2008-06-13 16:33:49 bkopski 13 A COMPONENT OF INTEREST 1702 2008-06-12 07:02:09 Markus Hansen 1 Re: Digest Number 545 1699 2008-06-10 20:24:45 Wes Hayward 1 Transformer Coupled LC Bandpass Filters 1698 2008-06-10 20:21:38 Wes Hayward 2 Free SMT parts 1697 2008-06-07 14:18:53 Mike Czuhajewski 1 KK7B address needed 1695 2008-06-05 21:33:19 ve7ca2 5 Analog VFO Freq. Stablization 1692 2008-06-05 07:43:27 bkopski 1 EMRFD FBA - A VARIANT 1689 2008-06-01 07:31:04 Steve Ratzlaff 1 Re: EMRFD FEEDBACK AMPLIFIERS (my own tests) 1688 2008-05-31 06:48:09 bkopski 1 EMRFD FEEDBACK AMPLIFIERS SIMPLIFIED 1687 2008-05-30 12:34:29 bkopski 3 EMRFD FEEDBACK AMPLIFIERS 1678 2008-05-25 08:19:59 Weddig, Henning-C... 2 AW: [emrfd] 100 MHz Crystal Source 1677 2008-05-25 08:19:53 brian_vandewetter... 5 Regen Receiver 1.6 1675 2008-05-24 21:39:12 John Shepherd 3 100 MHz Crystal Source 1669 2008-05-24 09:07:03 Kent VE4KEH 1 Re: Need a power standard 1668 2008-05-24 08:45:19 Alan Melia 1 re Need a power standad 1665 2008-05-24 07:29:46 bkopski 1 EXPERIMENTAL METHODS - THE HARDWARE PART 1658 2008-05-23 14:54:02 Weddig, Henning-C... 1 AW: [emrfd] AD9912 DDS clock source - just a thought? 1657 2008-05-23 12:21:36 rcbuckiii 11 Analog Meter Faceplate Modifications 1652 2008-05-23 09:28:31 Kevin - M0KHZ 1 Re: [SPAM] [emrfd] AD9912 DDS clock source – just a thought? 1651 2008-05-23 09:28:22 richj_focus 3 Need a power standad 1649 2008-05-23 07:29:23 Kevin Wheatley 3 AD9912 DDS clock source just a thought? 1645 2008-05-22 10:07:11 Pat Bunn 10 VXO with 74HCT74 divider circuit 1644 2008-05-17 18:43:09 Alan Jones 1 Buying the book: Experimental Methods in RF Design 1642 2008-05-13 10:19:56 michael taylor 2 RF power transistors from ST 1630 2008-05-03 07:07:50 tg6124 1 w7zoi spectrum analyzer 1622 2008-04-28 13:17:09 Ed Culbertson 4 Newbie 1619 2008-04-28 13:16:59 Ashhar Farhan 3 Fig 8.22 - Modular Direct Conversion Receiver of EMRFD 1613 2008-04-28 06:32:24 Giancarlo 1 Interesting articles in Microwave & RF April 2008 issue 1611 2008-04-27 20:58:28 Mike Czuhajewski 2 OT: Power supply switching frequencies 1608 2008-04-27 12:10:07 Rick 4 Op-Amp space constraints 1604 2008-04-26 23:05:05 Rick 6 Op-Amps in EMRFD 1597 2008-04-25 21:18:30 Frank 8 Op amps and crossover distortion with RC loads 1593 2008-04-24 19:54:00 jwharding3 2 LC Filter Construction Techniques 1592 2008-04-24 19:53:54 Ashhar Farhan 1 A Signal Generator 1586 2008-04-23 22:15:17 richj_focus 6 Scratch removing 1583 2008-04-22 19:49:31 VE4KEH 1 Wire-Wrap Wire and Toroids (was help my junk box) 1576 2008-04-21 19:31:41 w8fgqrp 6 KA7EXM Power meter 1571 2008-04-21 03:26:32 Loren Moline 9 RF Transformers 1569 2008-04-20 19:08:55 Art 1 rf parts for sale 1564 2008-04-20 15:15:00 st2nh 5 help my junk box 1562 2008-04-20 07:33:00 Vincenzo Calandra 2 DTC designing help 1561 2008-04-19 07:37:07 st2nh 1 greeat group 1559 2008-04-18 07:11:48 Alan Ibbetson 2 Filter layout to minimise unwanted coupling 1554 2008-04-14 07:11:22 Ashhar Farhan 5 DTC losses 1552 2008-04-13 13:57:51 Giancarlo Moda 1 Fwd: Not emrfd - PA3AKE High Performance Front-end Update 1551 2008-04-13 13:37:19 Giancarlo Moda 2 Not emrfd - PA3AKE High Performance Front-end Update 1548 2008-04-09 11:08:05 ter753 2 Re: ade mixers 1546 2008-04-08 17:20:47 ter753 2 ade-1 mixers 1543 2008-04-03 21:46:54 MILAREPA 4 TWO TONE GENERATOR 1535 2008-03-30 04:24:01 kklonk 1 Simple PSK31 transmitter 1534 2008-03-29 13:16:35 Henry 1 FS: Open core coils 1526 2008-03-28 09:49:53 Dan Reynolds 7 Looking for parts help 1525 2008-03-28 06:17:37 ea3ghs 3 a minimalist software-defined radio for 15m 1521 2008-03-26 19:28:06 Rick 1 EMRFD 1.34 1519 2008-03-25 19:36:56 Roger Hayward 11 test message 1514 2008-03-13 13:50:55 Robert Cerreto 3 K and Q Values for filters 1510 2008-03-12 05:15:45 Brad Hedges 1 buying the book 1504 2008-03-10 13:47:34 bkopski 3 A Narrow Xtal Filter / DSO Experiment 1498 2008-03-10 06:49:49 Artur Angielski 2 helical resonator 1497 2008-03-10 06:49:47 geomx2k7 28 Buying the book 1494 2008-03-04 07:06:48 Heikki Ahola (OH... 2 State-of_the-art in RF clipping 1492 2008-03-02 19:06:35 Pat Bunn 1 Spectrum analyzer and tracking generator 1489 2008-03-01 22:25:03 kerrypwr 2 Matching Crystal Filter Input & Output 1478 2008-02-28 09:13:59 Jim Miller 4 Ghz Scopes? 1477 2008-02-28 07:04:05 rickard.john 2 Ultraspherical filters 1474 2008-02-27 10:49:25 hi_gopi 4 [Not EMRFD] Cheap source for RF connectors 1473 2008-02-27 06:28:00 Kenneth Stringham 2 WAV file signal generator software 1470 2008-02-25 20:18:07 kanewderfish 1 Zout of a 2N4401 tuned RF amp 1468 2008-02-23 20:55:18 Art 12 low loss high Q front end for vhf 1467 2008-02-23 13:03:31 Roger Hayward 1 Posting etiquette 1445 2008-02-20 18:13:23 mdgolfbum 9 SA Narrow Crystal Filter? 1437 2008-02-19 11:36:06 ter753 21 ade 1 mixers 1431 2008-02-17 08:16:27 wk0qkr1 6 HuffPuff circuit to control a crystal oscillator 1429 2008-02-13 13:16:32 jim.scott@scottel... 1 Ozarkcon QRP Conference in April 1425 2008-02-10 13:37:48 Giancarlo 1 NOT EMRFD - PA3AKE High Dynamic Range Front End 1421 2008-02-06 22:05:08 joe price 1 MRI power amplifier 1420 2008-02-06 22:04:57 Markus Hansen 1 Re: Single Stage Norton Amp. 1419 2008-02-06 17:11:41 sp9mrn 4 H-mode mixer questions 1414 2008-02-05 22:26:10 Pat Bunn 1 ADE Mixers 1412 2008-02-05 14:56:05 Thomas S. Knutsen 7 IF module 1404 2008-02-04 19:39:01 Pat Bunn 1 60 Meter Receiver 1399 2008-02-04 13:17:01 Markus Hansen 4 Re: Digest Number 471 1398 2008-02-04 13:16:55 Larry Jones 2 EMRFD Files? 1396 2008-02-04 07:41:23 bkopski 2 SIMPLE HB CABLE HOLDER 1395 2008-02-03 13:27:02 sm6skh 1 WANTED FMMV2103CT VARICAP DIODE 1394 2008-02-03 11:06:15 ter753 1 pat bunn diode ring 1387 2008-02-01 16:07:48 Clark Fishman 5 WANTED MC145152 Freq synthesizer Chips 1378 2008-01-27 18:06:48 dallasaf5b12 5 Scale the Cascode AGC Board to 455? 1375 2008-01-25 10:35:00 Brad Hedges 3 Guanella paper 1371 2008-01-25 01:10:22 sm5glc 3 Guanella, Ruthroff et al 1367 2008-01-24 13:49:09 Rick 8 Diode Ring Mixers 1361 2008-01-23 18:26:30 bkopski 13 DIODE RING MIXER DISCUSSION FOLLOWUP 1354 2008-01-22 18:30:12 ter753 5 diode ring mixers 1348 2008-01-22 13:11:40 bkopski 15 SOME DIODE RING MIXER EXPERIENCES 1346 2008-01-19 08:14:43 bkopski 1 Experimenter's Tool 1341 2008-01-17 18:43:30 joe price 5 Elantec IC 1337 2008-01-15 14:50:05 k8iqy 1 -20 dBm Couplers 1327 2008-01-14 17:56:54 Chuck Adams 12 uV signal measurements 1324 2008-01-14 02:32:41 Heikki Ahola (OH... 4 Variable gain in linear amplification 1318 2008-01-13 12:45:24 Dimitri Aguero 5 Still waiting for how to calculate the output impedance of the SP-1 1316 2008-01-13 04:53:59 Brad Hedges 1 AADE L/C Meter Fixture / Adapter 1312 2008-01-12 12:30:36 Dimitri Aguero 2 Calculating a Butterworth filter 1311 2008-01-12 12:22:37 bkopski 5 AADE L/C Meter Fixture / Adaptor 1298 2008-01-03 19:10:30 Clark Fishman 2 Hycas 1293 2008-01-03 10:22:15 Nick Kennedy 17 Hycas IF amp & crystal frequencies 1289 2008-01-02 10:26:10 Ed Almos 4 Substitution of MRF586 In High IP3 Front End 1283 2007-12-28 08:13:22 Alan Melia 1 Phase Noise Measurements..agn 1281 2007-12-27 22:59:28 Chuck Adams 1 ISBN Nr 1271 2007-12-27 11:05:41 Chuck Adams 2 Phase Noise Measurements 1268 2007-12-27 09:12:00 Baruch Zilbershat... 8 34 mhz crystal or osc.-help 1266 2007-12-27 07:02:17 Alan Melia 6 re measuring phase noisee 1260 2007-12-25 19:20:31 mdgolfbum 12 Measuring Phase Noise? 1259 2007-12-25 18:17:39 cwfingertalker 1 FYI to the Group: INRAD one day sale on crystal filters. 1258 2007-12-25 04:14:03 Omar Shabsigh 1 Season's Greetings 1254 2007-12-24 09:59:16 john lawson 1 S Meter for the Hybird Cascode IF Amp 1241 2007-12-17 20:35:25 anguria2004 13 Hybrid Cascode IF Amp 1236 2007-12-16 16:44:28 Robert Cerreto 8 MiniCircuits POS Series VCO 1235 2007-12-14 19:39:18 Jim Kortge 1 New NorCal S1-S9 Signal Generator Report 1232 2007-12-12 15:46:24 Markus Hansen 2 Spectrum Analyzer-Tracking Osc. 1231 2007-12-12 14:35:00 ka3j12 1 74AC02 NOR Gate 1230 2007-12-11 17:28:31 ter753 1 k5/k3 1228 2007-12-11 11:53:11 ter753 2 elecraft k5 1225 2007-12-11 09:26:34 Clark Fishman 3 Elecraft K5 Info 1223 2007-12-10 20:54:01 ve7ca2 3 Spectrum Analyzer - Tracking Osc. Mod. 1221 2007-12-09 15:55:04 Mike Czuhajewski 2 Automatic power off, started out as [emrfd] KA7EXM microWattmeter 1220 2007-12-09 14:14:11 w4zcb77 1 KA7EXM microWattmeter 1211 2007-12-05 17:17:54 George LaBelle 1 New to group - current activity 1209 2007-12-02 15:38:15 Wes Hayward 1 Hybrid Cascode IF Amplifier Stability Issues 1197 2007-11-28 09:24:04 cwfingertalker 18 Mitsubishi RD New Series Mosfet RF Power Transistors 1196 2007-11-28 00:46:42 Heikki Ahola (OH... 3 Class-A driver/PA in EMRFD and SSD for 1.8 - 30 MHz 1186 2007-11-24 09:50:57 Roger Hayward 1 Group Moderation Update 1185 2007-11-24 09:11:49 bkopski 4 AN AD8307 BASED POWER METER MODIFICATION FOR PEP MEASUREMENT 1181 2007-11-23 14:31:45 Frank 9 Floating grounds and ground return currents... 1180 2007-11-22 09:07:41 Roger Hayward 1 Hybrid Cascode PCB & Kitlet offering 1173 2007-11-21 07:07:56 Alan Melia 1 Re Overtone crystals 1167 2007-11-20 06:39:53 patt896 10 Hybrid Cascode GP AGC IF Amp vs HP AGC/IF Subsystem 1166 2007-11-18 12:53:38 Kevin Purcell 1 QRP2004 transceiver design online 1165 2007-11-17 16:14:30 ve2azx 1 Q factor measurement from 3 Insertion Loss tests 1163 2007-11-13 01:01:27 Ed Almos 3 Frequency Offset in Phasing Transceivers 1161 2007-11-11 20:48:35 bdebbasch 2 Double-Tuned Circuits loaded with a FET 1153 2007-11-06 08:05:50 Alan Melia 6 Overtone crystals 1143 2007-11-05 11:31:01 Niels A. Moseley 13 BD135 as an RF amplifier 1141 2007-11-04 07:54:12 ka3j12 2 Effect of Crystal Load Capacitance 1140 2007-11-03 13:59:12 Roger Hayward 1 Yahoo Group Issues, Corrected (for now) 1135 2007-11-02 21:13:41 Roger Hayward 1 Urgent: Yahoo Group Category Issues with EMRFD 1130 2007-10-30 14:42:53 Ed Almos 5 Capacitor & Inductor Values In Filters 1122 2007-10-28 20:23:04 Johan H. Bodin 2 Class E 1120 2007-10-28 10:50:45 Mike Scott 8 Finger Stock source 1119 2007-10-27 07:18:37 Hari G 1 Re: Interfacing Spectrum Analyzer to PC 1118 2007-10-24 02:57:57 f2dc2003 1 Interfacing an old Spectrum Analyzer to a PC 1106 2007-10-18 12:57:40 Jim Miller 3 Hybrid Cascode Noise Analysis? 1099 2007-10-16 21:49:16 Mike Czuhajewski 1 Q, Q meters and old HP Info (second posting) 1098 2007-10-16 21:49:16 Mike Czuhajewski 1 Q, Q meters and old HP info 1097 2007-10-16 15:34:44 Kevin Purcell 1 Q, Q meters and polyvaricon Q 1087 2007-10-15 01:04:26 neomag_magneo 7 AGC-range in mosfet if-amplifier chain 1082 2007-10-10 20:12:16 bkopski 4 Linearization of Varactor Tuned VFO 1081 2007-10-03 15:42:33 ka3j12 1 Anyone Ordering from Digikey Soon? 1074 2007-09-30 09:02:23 bkopski 6 How's My Audio? 1059 2007-09-27 08:28:08 jac.clement 9 Favorite Parts list 1056 2007-09-27 01:54:29 Ed Almos 9 Do I Need to Use Diplexers? 1051 2007-09-25 13:37:45 bkopski 7 Binocular Core Winding 1044 2007-09-19 17:50:19 bkopski 4 MOSFET PA Bias Stabilization Circuit 1042 2007-09-19 07:08:08 Greg Derda 3 Regen 101 question 1038 2007-09-18 11:58:58 Ed Almos 5 Low Noise 41 MHz Oscillator 1031 2007-09-17 12:45:05 ter753 1 pixie problem 1030 2007-09-17 10:15:12 buddybell1143 1 Pixe assembly problem 1023 2007-09-16 17:09:39 Gary Johnson 14 Mounting Toroids 1009 2007-09-03 20:30:56 Hari G 3 Adding a PLL for the POS200. 1008 2007-09-02 08:53:35 Leon 1 Parallax propeller as RF source 1004 2007-09-01 06:51:07 bradley.d.hedges@... 2 Digikey PNs for ZOI SA/TG 1003 2007-08-31 10:49:26 Hari G 13 Spectrum Analyzer BPF 996 2007-08-30 09:29:07 jr_dakota 7 Speaking of esoteric mixers 976 2007-08-25 07:52:01 Allison Parent 13 mosfet wide band amps 974 2007-08-24 14:07:08 Ted Bruce KX4OM 4 SA-612 Impedance Questions 970 2007-08-23 15:21:45 ka3j12 2 SA612 pin 6 input impedance 969 2007-08-23 08:18:35 kc0vkn 4 Buffer stage troubleshooting 968 2007-08-23 07:41:11 Giancarlo 3 A FRONT-END WITH AN IIP3 > +50dBm ? 957 2007-08-16 10:15:47 Sam Morgan 2 'corrected' LTSpice and ELR audio amp circuit help needed. 956 2007-08-16 10:09:23 Sam Morgan 10 LTSpice and ELR audio amp circuit help needed. 955 2007-08-14 15:23:59 sp9mrn 1 High pass Filter 939 2007-08-06 16:14:50 Allison Parent 21 Understanding and basic design of linear power chains. 937 2007-08-06 07:13:44 Artur Angielski 1 never trash anything 931 2007-08-05 14:10:11 Ted Bruce KX4OM 12 Transceivers you have built 920 2007-08-04 09:07:40 Giancarlo 4 I0CG new AD9912 1GHz DDS 916 2007-08-03 13:33:01 Ted Bruce KX4OM 15 Fig 11.14 Transmit Chain questions 914 2007-07-30 09:11:54 Artur Angielski 2 ground loops on thick copper clad 911 2007-07-26 22:53:57 ka3j12 1 Need 2SC5739 906 2007-07-21 07:01:01 wbdmxbaileybobbut... 7 power amp 901 2007-07-14 08:24:29 Ed Almos 4 Combining Low-Pass & High Pass Filters 900 2007-07-12 06:25:05 Giancarlo 1 NOT EMRFD - ITALY NOW OPERATING ON 70 MHz 897 2007-07-11 13:55:35 Ed Almos 3 BPF Parts Purchase For European Hams 893 2007-07-10 23:35:08 brainerd@wildblue... 5 BPF Board 892 2007-07-08 10:51:25 brainerd@wildblue... 1 BPF Filter Board 891 2007-07-06 21:27:37 brainerd@wildblue... 1 Re: [dds_controller] BPF Board 887 2007-07-06 04:22:42 Joe Rocci 4 Classic Document Reconstruction 874 2007-07-01 11:49:36 David Brainerd 13 Band Pass Filter Boards 870 2007-06-28 00:15:52 wk73ch 4 18 MHz Transceiver - Voltages 865 2007-06-20 15:49:44 Mike Brainard 2 Clipped Sine Wave Info 852 2007-06-12 00:51:54 ter753 1 excessive current 5532 851 2007-06-11 18:55:27 w1kilofoxtrot 8 Excessive current drain in Analog Signal Processor? 847 2007-06-09 04:43:39 sp9mrn 1 AGC problem (AD600, AD8307) 846 2007-06-08 22:22:04 David Brainerd 1 PCB fab house 838 2007-06-07 19:54:29 wbdmxbaileybobbut... 3 20 db tap 835 2007-06-06 20:40:34 wbdmxbaileybobbut... 1 just a update 834 2007-06-06 20:31:16 Jason Milldrum 33 Step Attenuator Project 825 2007-06-03 20:49:08 wbdmxbaileybobbut... 12 sa612 circuit 824 2007-06-03 16:59:17 Thomas Butchers 5 Beta / Transconductance (was new with questions) 819 2007-06-02 12:28:08 Ed Almos 1 Adding FM Receive to an R2 817 2007-06-02 09:03:30 KF4YYD 7 New with Questions 814 2007-05-30 19:50:12 kanewderfish 3 AC formulas on p2.25 vs FBA program from CD 809 2007-05-29 15:53:12 kerrypwr 5 AADE Filter Program 804 2007-05-26 08:39:22 Jim Miller 1 AD DAC Xfrmr Ap Note 799 2007-05-25 08:23:05 Giancarlo 1 NOT EMRFD - AD9912 SFDR measurements 798 2007-05-25 08:23:03 ter753 3 ad831 dc receiver in files section 793 2007-05-24 07:02:23 Giancarlo 1 NOT EMRFD - Better to use AD9912 and not AD9910 791 2007-05-24 07:01:43 patt896 4 Reverse Polarity Protection -- VK3EM Solution -- "Transorb" 784 2007-05-22 16:16:51 topossibilities 4 Details on MC1496 based SSB Transceiver 783 2007-05-22 14:16:23 ka3j12 1 Post DDS Filtering 781 2007-05-22 14:13:49 vk3em 1 Analog Devices DDS IC's 780 2007-05-21 16:18:11 Kevin Purcell 1 Giving the Gilbert cell mixer a low input impedance 779 2007-05-21 09:58:13 Kevin Purcell 6 Analog Devices AD831, AD8342 and AD8343 Gilbert cell mixers 775 2007-05-20 13:44:12 Kevin Purcell 1 SM5BSZ measurements on diode switching IMD and HD 774 2007-05-20 13:44:12 Hari G 8 POS-200 question 771 2007-05-20 13:43:22 Kevin Purcell 2 WN5Y Super Blue LED Mixer 770 2007-05-20 13:43:13 Kevin Purcell 1 NJM2594 Gilbert cell double balanced modulator/demodulator 769 2007-05-14 20:53:27 Kevin Purcell 1 JH5ESM and diode switches 765 2007-05-12 14:53:03 Ed Almos 3 Switching Time of Phased Lock Loop 761 2007-05-11 21:36:15 Roger Hayward 1 Regarding Memberships and Spam postings 757 2007-05-11 17:23:49 Kevin Purcell 2 ITU-R P.372-8 expected ambient noise level recommendation and "good 756 2007-05-11 16:35:04 Kevin Purcell 2 G4COL Experiments with high current Gilbert cell mixers 749 2007-05-10 18:45:43 wbdmxbaileybobbut... 8 spectrum analyzer 748 2007-05-10 17:18:29 Jim Stafford 1 Looking for information about "EZ 40 RCVR" 747 2007-05-10 16:43:12 Kevin Purcell 1 Using a diode ring DBM as an 50dB range current controlled attenuat 745 2007-05-10 16:14:21 patt896 1 Re: Good Receiver or Transceiver to Build / ARRL 730 2007-05-08 12:10:36 ter753 2 gian /k1/k2 729 2007-05-08 07:42:11 ter753 1 good receiver to build 728 2007-05-08 07:41:35 Giancarlo 1 Improvement changes to Elecraft K2 and K1 transceivers 719 2007-05-06 12:04:12 Darrell Bellerive 1 Attenuator Article? 714 2007-05-04 15:32:21 Giancarlo 2 PA3AKE H-MODE MIXER MEASUREMENT UPDATE 703 2007-05-03 16:19:08 ka3j12 9 VFO level for SA612 Mixer 702 2007-05-03 16:15:31 ka3j12 1 DipTrace versus Eagle 697 2007-05-03 07:35:24 mrl_msts 6 Northern Lights 695 2007-05-03 05:45:26 Luiz Amaral 1 Cell Phones 689 2007-05-01 18:13:23 Steve White 27 Good Receiver or Transceiver to Build 683 2007-05-01 15:45:12 Giancarlo 1 Making a SoftRock V6 and similar Multiband HF SDR RX 680 2007-05-01 11:05:02 wbdmxbaileybobbut... 3 I Q vfo 679 2007-05-01 10:17:26 Hari G 7 Gain of MC1496 675 2007-04-28 06:17:40 Ed Almos 8 Binocular Core Selection For H-Mode Mixer 673 2007-04-25 13:40:28 homsleyt 1 Thanks Wes and Bill 670 2007-04-21 19:58:21 wbdmxbaileybobbut... 1 thanks 656 2007-04-19 05:40:11 Kenneth E. String... 1 Finally Have my own Book 655 2007-04-18 11:13:30 Ed Almos 15 DIP Oscillators - A Cautionary Tale 648 2007-04-16 04:03:42 hi_gopi 5 Hole punching in Hammond shield Boxes 629 2007-04-12 04:07:07 neomag_magneo 21 SSB signal distortion in homwbrew receiver 628 2007-04-11 08:06:52 Ed Almos 1 Useful dBm Calculator 624 2007-04-07 18:12:18 Andrew 4 homebrew sig gen 621 2007-04-06 11:41:59 ter753 1 signal gen ect. 605 2007-04-05 11:34:18 chuck allen 15 How to approach EMRFD? 600 2007-04-05 06:36:41 DSNman@comcast.ne... 3 Crystals 598 2007-04-05 06:06:00 Ed Almos 7 Input Capacitance of Large MOSFETs 590 2007-03-29 14:10:08 Ed Almos 1 Varicap Diodes 588 2007-03-29 07:00:42 wa0goz 2 emrfd digests 562 2007-03-23 18:03:40 homsleyt 33 Universal QRP MK II 561 2007-03-23 17:59:29 homsleyt 2 DSP-10 PCB 559 2007-03-23 14:49:46 Mike Brainard 2 Phase Noise of Frequency Dividers 556 2007-03-22 08:50:46 Henry 2 Missing Digests 549 2007-03-21 13:39:04 bkopski 3 Power Meter Application Example 536 2007-03-18 01:55:00 Ed Almos 18 Matching Transformer With Dual Outputs 532 2007-03-17 11:17:47 ter753 1 steve, ne602 529 2007-03-16 12:28:57 Steve White 1 Testing receiver front end filters 523 2007-03-15 14:03:41 la3pna 10 Problems with power meter. 522 2007-03-15 08:29:15 briefer@cox.net 1 MIT Video Courses 520 2007-03-14 15:04:55 Jim Stafford W4QO 2 MIT OpenCourseWare 515 2007-03-12 06:51:55 Hans Summers 4 Re: H-Mode Mixer as tested by PA3AKEuls 507 2007-03-07 06:51:49 Giancarlo 9 H-Mode Mixer as tested by PA3AKE 506 2007-03-05 13:28:02 Howard Weinstein 1 FS - RF Transistors MRF-454's etc. 488 2007-02-24 08:57:24 patt896 18 Reverse Polarity Protection 470 2007-02-14 11:15:42 Ted Bruce KX4OM 5 Inexpensive Homebrew Hot Air Pencil for SMD work 468 2007-02-14 09:18:37 Alessandro Santuc... 1 Home Made news 466 2007-02-13 11:47:46 Ted Bruce KX4OM 5 More X-Pad photos with BF998 461 2007-02-12 05:15:32 neomag_magneo 1 FSK in homemade transmitters 460 2007-02-12 01:39:06 jr_dakota 2 X Pad Pictures 452 2007-02-10 08:05:31 Bob Miller 4 Toko Inductors? 451 2007-02-08 08:39:38 Stan 2 Series tuned Clapp VFO questions 449 2007-02-07 11:29:44 ter753 2 i q vfo 446 2007-02-06 06:27:55 Terry WAØITP 4 X-Pads 444 2007-02-06 02:49:49 ter753 3 vfo and splitter 426 2007-02-03 06:03:34 Jim Miller 24 Playing around with RF receive amps 424 2007-02-01 18:48:36 Mike Scott 4 3 dB splitter 419 2007-01-31 14:44:03 patrickno5o 1 This is a test 415 2007-01-31 13:02:14 D 5 DDS 403 2007-01-30 17:13:31 Dino Papas 1 PC Board Cutting -- Sorry about the URLs 401 2007-01-30 17:10:10 Dino Papas 9 Cutting PC Board 390 2007-01-29 19:14:36 Stephen 18 Some basic questions 389 2007-01-29 18:03:33 Nick 10 What's better than a TIP31? 387 2007-01-28 23:01:40 Rud Merriam 3 DSIP Board 382 2007-01-27 20:37:10 Jim Miller 5 Helical Filter? 378 2007-01-27 12:00:11 Jim Miller 2 Measuring phase noise 368 2007-01-26 20:10:44 Jim Miller 13 100Mhz Crystal Sources? 365 2007-01-25 13:23:10 Mike Brainard 3 Transformers wound on 6 Hole Beads 363 2007-01-23 10:27:50 DOUG PHILLIPS 2 Trade Beldin 1671 for RG-188 362 2007-01-22 08:00:49 bkopski 1 Ugly RCA connector method 358 2007-01-18 21:57:06 Monty N5ESE 3 T/R Switch For QRP Separates 354 2007-01-18 09:11:31 Ralph 3 New Book 353 2007-01-18 06:17:28 neomag_magneo 3 Receiver noise figure for the top band and below 347 2007-01-16 01:02:55 neomag_magneo 5 Crystal Ladder filters above 30 MHz 335 2007-01-12 16:30:04 Robert Cerreto 2 Correction to Fig 6.151 in EMFRD 327 2007-01-11 13:26:35 Allison Parent 12 VFO drift on power up 324 2007-01-10 09:49:16 homsleyt 7 Chapter 10 DSPx/KDSP10 loader 316 2007-01-08 09:50:08 Frank 7 Q - suggestions for putting in a stock of toroid cores 314 2007-01-07 17:15:57 James Duffey 10 Use Preselector for Multiband DC Receiver 312 2007-01-07 07:41:48 Brian George 2 Multiband DC Receivers - Thanks 305 2007-01-06 09:25:43 Brian George 8 Multiband DC Receivers 303 2007-01-05 15:31:45 Wes Hayward 1 SMT Low Pass Filter 298 2007-01-04 04:14:14 neomag_magneo 5 Bandpass filters with series resonators: a problem in the design 293 2007-01-03 10:20:17 Alexandre Veiga -... 6 Toroid FT37-77 289 2007-01-02 03:01:49 neomag_magneo 4 Transformers for H-mode mixers: a question 283 2006-12-31 06:52:43 Hari G 6 Wide VCO for SA 278 2006-12-30 09:55:58 James Duffey 2 505 kHz Experiment 277 2006-12-30 00:36:00 Rick 4 505 kHz experiment 261 2006-12-24 13:06:33 Stan 8 capacitor material selection help 260 2006-12-24 12:20:57 ka3j12 5 Voice Power Spectrum Density 258 2006-12-23 17:19:00 Loren Moline WA7S... 1 Receive splitter 257 2006-12-23 15:51:53 Ted Bruce KX4OM 3 MMIC PC Board mounting 252 2006-12-22 08:28:44 w4zcb77 8 Homebrew boxes and shielding 245 2006-12-18 12:12:38 Wes Hayward 4 General Purpose Test Oscillator 244 2006-12-18 12:08:09 Wes Hayward 3 VFO Drift 238 2006-12-18 07:56:43 S. Cash Olsen 6 Fw: [QRP-L] THE ARRL KILLED MY DOG!!! 235 2006-12-15 10:17:35 brianars 4 Using EMRFD with other RF Design Books 229 2006-12-09 14:20:21 Paul Wilton 5 R2 pro on 2m 228 2006-12-09 04:51:20 Sam Morgan 1 QUCS Circuit modeling program 227 2006-12-08 09:24:57 Hari G 2 Spectrumanalyzer 3356chip 226 2006-12-01 19:11:38 Hari G 1 MC3356 question 218 2006-11-26 22:17:09 Mike Czuhajewski 1 Why do we match mixer diodes? 216 2006-11-26 18:35:20 Mike Czuhajewski 2 Microphonic mixer chips? 209 2006-11-26 13:32:59 Robert Cerreto 13 Need Some Toroid Advice 208 2006-11-26 12:42:57 jr_dakota 2 W7ZOI Spectrum Analyzer Question/Problem 206 2006-11-20 22:08:03 michael taylor 2 Recommended reading for practical FM receiver design 205 2006-11-20 17:56:26 Rick 1 a few thoughts on minimalist radio 201 2006-11-18 10:17:49 Stan 4 Looking for help with PIXIE mixer stage 194 2006-11-08 21:02:38 Gary 3 terminating impedance 189 2006-11-07 23:11:38 Monty N5ESE 7 New Filter Chips 187 2006-11-07 13:31:49 Stan 1 OT: microprocessor controller 185 2006-11-07 10:44:15 Nick Kennedy 4 Up-conversion 181 2006-10-30 23:02:14 Rick 3 VFO adjustments 180 2006-10-30 18:18:03 Preston Briggs 3 VFO 178 2006-10-23 16:38:47 Rick 1 SSB-DSB-AM 177 2006-10-22 13:13:23 Steven S. Coles 2 Transconductance Equation Question 172 2006-10-18 17:07:36 Wes Hayward 5 The ARRL Challenge--SSB Vs DSB 170 2006-10-07 23:15:08 n2cqr 1 SolderSmoke interview with Ashhar Farhan 168 2006-10-05 15:26:59 topossibilities 2 3 very good articles (understanding resistors, avoiding ground loop 157 2006-09-21 09:05:02 Stan 10 H-mode mixers, etc. 156 2006-09-15 08:01:35 Stan 2 transformer phase coupling question 155 2006-09-14 16:15:01 topossibilities 1 An interesting brick-wall low pass filter 148 2006-09-13 21:16:05 Stan 7 what cad pcb and schematic do you use ? 141 2006-09-12 15:27:31 kilocycles 1 Capacitors used in Transmitter PA filter applications 140 2006-09-12 09:16:23 Shawn 1 RX Switch 135 2006-09-10 23:52:31 Steven S. Coles 11 7 MHz Oscillator Capacitors 131 2006-09-09 16:36:11 Jason Milldrum 4 QRPedia 127 2006-09-08 21:30:42 Steven S. Coles 3 On the Air 125 2006-09-08 08:13:13 gvastianos 1 EUROPEAN AMPLITUDE MODULATION AMATEUR RADIO GROUP 121 2006-09-06 16:55:50 Jim Kortge 6 Crystal Information 120 2006-09-03 11:01:14 Stan 2 Universal QRP transmitter changes question 119 2006-09-02 00:23:40 Stan 1 Building a flock of antique sand state qrp units 116 2006-08-30 17:40:34 Hans Summers 3 Crystal motional parameter measurement 112 2006-08-26 09:50:20 kilocycles 2 Hartley VFO capacitors 109 2006-08-24 18:00:04 Mike Short 1 6M preamp parts 103 2006-08-23 15:01:32 Stan 4 Zener protected final stage 102 2006-08-23 11:21:01 kilocycles 3 Math Mystery in EMRFD Appendix Article 101 2006-08-22 14:21:55 jim.scott@scottel... 1 RF Design Procedures Step by Step? 96 2006-08-18 05:39:49 Stan 5 Feedback Amp design Procedure questions EMRF 95 2006-08-16 20:49:57 jmilldrum 1 Feedback Amplifier Design 94 2006-08-16 20:28:44 emrfd@yahoogroups... 282 New file uploaded to emrfd 87 2006-08-15 10:38:54 Stan 6 Have you considered cloning a 50s era receiver or transmitter? 83 2006-08-13 03:55:45 Gary 5 spectrum analyser software 82 2006-08-11 17:58:11 David Brainerd 1 Discontinued Motorola IC's 81 2006-08-08 09:26:52 kilocycles 2 Advice needed on Converters for PC-based FFT SA 80 2006-08-07 09:52:38 Steven S. Coles 1 Practical Circuit Analysis 77 2006-08-05 18:52:00 kenk1zyw 2 ARRL Challenge 72 2006-08-04 16:30:48 topossibilities 1 Article on the impact of ultralow phase noise oscillators on system 71 2006-08-04 09:53:43 Shawn 3 Question about the book 68 2006-08-03 23:20:32 Frank 4 Question on how to use NE602 66 2006-08-02 21:38:33 Rud Merriam 1 2m Xcvr Data Radio 65 2006-08-02 20:24:39 Steven S. Coles 2 DD 50 to 7 MHz Converter Oscillator 56 2006-08-02 11:40:46 jmilldrum 5 Feedback Amplifier/Attenuator Pad 52 2006-08-02 07:23:27 Stan 5 1N400x diodes used as PIN diodes - a question 48 2006-07-31 15:40:02 Patrick McGuire 1 (no subject) 47 2006-07-31 15:13:24 lousana78 1 Resistance Bridge with Outboard Seried LC Network 46 2006-07-30 20:40:46 Henry 2 EMFRD Digest 40 2006-07-28 20:41:34 Stan 7 What are you going to build before XMAS? 38 2006-07-26 11:01:18 Lyle Johnson 1 DSPx and EMRFD 37 2006-07-25 15:50:10 Pete Eaton 8 VFO Options 36 2006-07-25 14:21:18 Pete Eaton 1 The Mighty Midget Revisited 34 2006-07-23 07:43:28 Bruce Beford 1 Digests? 28 2006-07-21 15:43:05 Wes Hayward 7 The Homebrew Challenge 27 2006-07-18 11:04:02 lownslow1601 1 message digest received 26 2006-07-16 17:01:50 lownslow1601 1 message digest 25 2006-07-16 15:49:15 Wes Hayward 1 Toroid Power Rating 20 2006-07-15 09:51:36 Hari G 3 EMRFD CHP-7 (Sch 7.11) 19 2006-07-15 08:52:15 Steven S. Coles 1 Introduction to Radio Frequency Design by Wes Hayward Arrived 12 2006-07-14 04:24:32 g3vmu 9 Toroids 8 2006-07-11 11:46:55 kd5kxf 3 Ferrite Core Experiments 4 2006-07-10 12:42:39 Stan 5 Use of power iron core and power question 2 2006-07-05 16:12:13 Rick 2 New EMRFD related projects 1 2006-07-03 14:21:12 Steven S. Coles 1 Great Book!