EMRFD Message Archive 94
Message Date From Subject 94 2006-08-16 20:28:44 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /EMRFD Feedback Amplifier.xls
Uploaded by : jmilldrum <jason@recursiv.com>
Description : Microsoft Excel worksheet used to predict the design parameters of feedback amplifiers as shown in Fig 2.69 on page 2.25
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jmilldrum <jason@recursiv.com>111 2006-08-26 09:15:16 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /HartleyCaps.xls
Uploaded by : kilocycles <kilocycles@yahoo.com>
Description : Worksheet allows selection of fixed capacitors in a Hartley tank in order to use an on-hand variable capacitor.
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kilocycles <kilocycles@yahoo.com>465 2007-02-13 06:45:07 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /Toroidal KANK.pdf
Uploaded by : i7swx <i7swx@yahoo.com>
Description : Info on making Toroidal KANK coil - From SPRAT Winter 2006
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i7swx <i7swx@yahoo.com>646 2007-04-14 08:04:14 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /I7SWX 2T H-mode mixer Notein Englis revA.pdf
Uploaded by : i7swx <i7swx@yahoo.com>
Description : This is a note on the I7SWX 2 Transformers H-Mode Mixer. It does include infos on the homemade transformers This mixer has been integrated into the G3XJP Pic-A-Star Software Transmitter and Receiver
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i7swx <i7swx@yahoo.com>682 2007-05-01 15:45:05 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /I7SWX_DQG_2xFo_HF improvxSoftRock.pdf
Uploaded by : i7swx <i7swx@yahoo.com>
Description : This is a note on how to modify a SoftRockV6 and similar QSDs to operate as a Multiband HF SDR RX - 73 Gian, I7SWX
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i7swx <i7swx@yahoo.com>684 2007-05-01 15:46:34 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /I7SWX SDR Marker.pdf
Uploaded by : i7swx <i7swx@yahoo.com>
Description : This is a note regarding a simple signal marker for Software Defined Radio - 73 Gian, I7SWX
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i7swx <i7swx@yahoo.com>727 2007-05-08 07:40:18 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /I7SWX Possible changes to K2 & K1 RTX.pdf
Uploaded by : i7swx <i7swx@yahoo.com>
Description : Improvement changes for Elecraft K2 and K1 transceivers. Info in documentation. 73 Gian, I7SWX
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i7swx <i7swx@yahoo.com>987 2007-08-27 13:51:25 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /ham-qrp.lbr
Uploaded by : kilocycles <kilocycles@yahoo.com>
Description : Custom EAGLE CAD parts; toroids, qrp design parts
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kilocycles <kilocycles@yahoo.com>992 2007-08-28 08:34:02 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /I7SWX 1T DOUBLE BALANCED FST3125 MIXER2 squarer.pdf
Uploaded by : i7swx <i7swx@yahoo.com>
Description : This is a simple DBM using half FST3125 switching transformer to ground. It maybe used as a mixer, demodulator and or modulator - Gian, I7SWX
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i7swx <i7swx@yahoo.com>1002 2007-08-31 09:30:40 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KB1GMX/BALMOD.jpg
Uploaded by : ajparent1 <kb1gmx@arrl.net>
Description : From ARRL SSB for the radio amateur, unique balanced modulator
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ajparent1 <kb1gmx@arrl.net>1045 2007-09-19 17:59:43 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /FETbiastempcomp3.PDF
Uploaded by : bkopski <kopskirl@netcarrier.com>
Description : MOSFET PA Bias Stabilization Circuit
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bkopski <kopskirl@netcarrier.com>1083 2007-10-10 20:15:22 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /VFO Linearizer Schematic.PDF
Uploaded by : bkopski <kopskirl@cavtel.net>
Description : VFO Linearizer
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bkopski <kopskirl@cavtel.net>1107 2007-10-18 12:59:05 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /AB3CV/060629 81MHz Driscoll Oscillator.pdf
Uploaded by : mdgolfbum <jim@jtmiller.com>
Description : Driscoll Oscillator example
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mdgolfbum <jim@jtmiller.com>1187 2007-11-24 10:04:36 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /Peak Hold Pwr Mtr Circuit.PDF
Uploaded by : bkopski <kopskirl@cavtel.net>
Description : Peak Hold Pwr Mtr Circuit Diagram
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bkopski <kopskirl@cavtel.net>1189 2007-11-24 11:19:14 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /Peak Hold Pwr Mtr Circuit rev1.PDF
Uploaded by : bkopski <kopskirl@cavtel.net>
Description : revised dwg. - corrects Q1 wiring in original file
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bkopski <kopskirl@cavtel.net>1693 2008-06-05 07:49:16 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /WBAmp1Sch1.PDF
Uploaded by : bkopski <kopskirl@cavtel.net>
Description : EMRFD FBA VARIANT (see related photos, text)
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bkopski <kopskirl@cavtel.net>1694 2008-06-05 07:59:58 Baruch Zilbershat... Re: New file uploaded to emrfd 1739 2008-06-23 08:45:12 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /WBAmp2Sch1.PDF
Uploaded by : bkopski <kopskirl@cavtel.net>
Description : A simple 2-device wideband amplifier stage.
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bkopski <kopskirl@cavtel.net>2713 2009-02-20 08:21:23 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /The Gnat/Gnat 40 Rev 0.pdf
Uploaded by : chris3trask <christrask@earthlink.net>
Description : A One-Transistor CW Transceiver
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chris3trask <christrask@earthlink.net>2716 2009-02-20 15:03:32 Alan Yates Re: New file uploaded to emrfd 2718 2009-02-20 15:43:06 Chris Trask Re: New file uploaded to emrfd >Yes, there is a lot of activity in this area. Nice to see all of the
> All this work on minimalist rigs of late is very interesting.
>
different small rigs and variations. One fellow even suggested connecting a
microphone to the audio transformer to make it an AM rig. I'd like to see
someone try that.
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_2721 2009-02-21 01:27:10 Alan Yates Re: New file uploaded to emrfd On Fri, 20 Feb 2009, Chris Trask wrote:
> Yes, there is a lot of activity in this area. Nice to see all ofIndeed, I've been looking for an old carbon microphone to try
> the different small rigs and variations. One fellow even suggested
> connecting a microphone to the audio transformer to make it an AM rig.
> I'd like to see someone try that.
collector/drain modulating my little rig. AM would work much better
with the super-regen detector than the current WBFM.
AM modulation into the collector circuit from a passive microphone would
only be practical at very low oscillator powers, as the microphone would
need to provide all the sideband power.
I use an electret microphone at the moment to achieve WBFM which is
essentially cheating for a true one active device phone transceiver.
If you don't mind another device it is easy to AM modulate the
oscillator. You could probably base-modulate your current rig, but I am
unsure how much modulation depth would be available. FM by comparison
is easy as the carrier power is just spread out by the modulation, not
added to it which requires significant AF power gain, especially at
high carrier powers.
Something Michael and I have talked around is using a magnetic amplifier
to achieve direct modulation of the RF. Also parametric modulation by
varactors which needs little power.
Another way to achieve WBFM is simply to couple the microphone diaphram
directly to the tank coil. I've played with this briefly and it works
fairly well. I noticed the latest SPRAT mentions the same idea by
gluing a polymer disk to the coil. Can't remember the author sorry...
--
Alan Yates
http://www.vk2zay.net/2730 2009-02-22 06:37:59 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /The Gnat/Gnat 40 Rev 1.pdf
Uploaded by : chris3trask <christrask@earthlink.net>
Description : Corrected typos and parts list. 80m version to follow later.
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chris3trask <christrask@earthlink.net>2739 2009-02-25 09:27:21 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /The Gnat/Gnat 40 Rev 2.pdf
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Description : Expanded version of the Gnat with 80m and 10m parts values plus PCB artwork.
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chris3trask <christrask@earthlink.net>2885 2009-04-08 04:13:53 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /RF_PA_finals.png
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Description : HF PA final stage topologies
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medvidec <vaclavpe@seznam.cz>3294 2009-07-07 12:24:01 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /Twisted Mag Wire Trans Line.pdf
Uploaded by : arfghans <gwj@spamcop.net>
Description : Lefferson, P., "Twisted Magnet Wire Transmission Line," (IEEE, 1971)
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arfghans <gwj@spamcop.net>3409 2009-08-03 13:19:46 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /Crystal Motional Parameters/Williams 1933.pdf
Uploaded by : chris3trask <christrask@earthlink.net>
Description : Early IRE paper showing non-integral harmonics of quartz crystals
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chris3trask <christrask@earthlink.net>3410 2009-08-03 13:51:46 victorkoren Re: New file uploaded to emrfd Chris,
If you see an up to date application note by Agilent in web site:
http://cp.literature.agilent.com/litweb/pdf/5965-7662E.pdf
Then at page 6 you can read:
"whereas the AT, which is cut at 35 degrees off the Y axis, vibrates in the thickness shear mode. An illustration of the various vibrati3411 2009-08-03 14:11:27 Chris Trask Re: New file uploaded to emrfd > Chris,the
> If you see an up to date application note by Agilent in web site:
> http://cp.literature.agilent.com/litweb/pdf/5965-7662E.pdf
> Then at page 6 you can read:
>
> "whereas the AT, which is cut at 35 degrees off the Y axis, vibrates in
> thickness shear mode. An illustration of the various vibration modes isgiven
> in Figure 7."its
>
> Practically all the crystals used by popular ham circuits are AT cut, so
> overtone is the shear mode (you can see in figure 7 at page 7 what shearmode
> means). The example in the IRE document obviously is not shear mode butAnd what does that matter? Overtone frequencies are not integral
> extensional mode that is immaterial to the crystals we usually use.
>
multiples of the fundamental regardless of the cut, and 1.007 is still not
exactly equal to 1.000.
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_3413 2009-08-03 14:27:23 victorkoren Re: New file uploaded to emrfd No one said that the overtone frequency of an AT-cut quartz crystal overtone frequency is exactly an integer multiplier. It is approximately (up to very few percent) from the odd integer multiplication.
Victor - 4Z4ME
3414 2009-08-03 14:33:11 Chris Trask Re: New file uploaded to emrfd >overtone
> No one said that the overtone frequency of an AT-cut quartz crystal
> frequency is exactly an integer multiplier. It is approximately (up tovery
> few percent) from the odd integer multiplication.You yourself have claimed more than once that since fn is approimately
>
equal to nfo we can make it exactly equal to nfo so that r'=n and therefore
ln is exactly equal to lo in all cases. Most, if not all of us have been
showing otherwise.
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_3415 2009-08-03 15:01:22 victorkoren Re: New file uploaded to emrfd To clarify the extent of the deviati3416 2009-08-03 15:05:55 Chris Trask Re: New file uploaded to emrfd >the
> To clarify the extent of the deviation from integer, here is a quote from
> book "Planar microwave engineering" By Thomas H.Lee (Who is a professor Ihigh
> really love to read) in page 518:
> "Because of a variety of effects the overtones are not exactly integer
> multiples of the fundamental (but they're close, off by 0.1% or so in the
> direction)"Are you again trying to say that almost equal to one is exactly equal to
>
one?
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_3418 2009-08-03 15:14:14 victorkoren Re: New file uploaded to emrfd And you said that the Overtones are all over the place.
I think that to finish this technical discussion we can agree that the overtones frequencies for AT cut crystals are approximately an odd integer multiplicati3419 2009-08-03 15:39:13 Chris Trask Re: New file uploaded to emrfd >No, I have never said any such thing. I have instead constantly said
> And you said that the Overtones are all over the place.
>
that they are not exact integral multiples, and I will continue to do so.
>overtones
>
> I think that to finish this technical discussion we can agree that the
> frequencies for AT cut crystals are approximately an odd integermultiplication
> of the fundamental frequency.Since you are constantly forcing the conclusion that "approximately"
> Agreed?
>
means "exactly", no. I know better than to openly or privately agree to
such.
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_3423 2009-08-04 03:41:56 victorkoren Re: New file uploaded to emrfd Chris,
I have reviewed all my posts in this discussion and I could not find one post that I had said that the Overtone frequency is the exact multiple of the fundamental frequency. I'd be glad if you tell me the post number that I had say that.
Please note that I always said that its very close, an approximation or if its an equati3425 2009-08-04 06:29:44 Chris Trask Re: New file uploaded to emrfd >You have, mostly indirectly, trying to force the conclusion that they are integral multiples. We've been over this far too many times already, and now you're attempting to alter your position.
>Chris,
> I have reviewed all my posts in this discussion and I could not
> find one post that I had said that the Overtone frequency is
> the exact multiple of the fundamental frequency. I'd be glad if
> you tell me the post number that I had say that.
>
>Now that this is no longer a technical discussion, I'm bringing it to and end. You'll have to take your circular arguments to someone else.
> Please note that I always said that its very close, an
> approximation or if its an equation then I used ~ instead of =.
>
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
_3506 2009-08-28 19:48:59 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /Crystal_Test_Setup.pdf
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Description : Paper about how to get crystals Data parameters
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fjch100 <felix.centeno@att.net>3762 2009-11-10 07:22:03 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /50MHzRFGen3Blk1.PDF
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bkopski <kopskirl@cavtel.net>4192 2010-02-04 10:24:45 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /CA3046 Chronicles/Crystal Oscillators Rev 0.pdf
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Description : Crystal Oscillators Using the CA3046 Transistor Array
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chris3trask <christrask@earthlink.net>4194 2010-02-04 11:28:31 Tayloe Dan-P26412 Re: New file uploaded to emrfd Chris;
Is there any significant difference between the CA3046 and the CA3086?
Is one a higher grade of the other? Looking at the spec sheets they
look a lot the same.
- Dan, N7VE
________________________________
4195 2010-02-04 12:10:35 Chris Trask Re: New file uploaded to emrfd Dan,
>The only thing I've ever noticed between the two is that the CA3046 is
> Is there any significant difference between the CA3046 and the CA3086?
> Is one a higher grade of the other? Looking at the spec sheets they
> look a lot the same.
>
better spec'ed for small signal NF performance and differential pair
matching. The CA3086 seems to be better suited for power applications as it
has a lower thermal resistance yet the same maximum dissipation and
temperature range.
Chris
,----------------------. High Performance Mixers and
/ What's all this \ Amplifiers for RF Communications
/ extinct stuff, anyhow? /
\ _______,--------------' Chris Trask / N7ZWY
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tafelschnecke <ehydra@arcor.de>5229 2010-09-22 21:15:30 kb1gmx Re: New file uploaded to emrfd 5234 2010-09-23 13:09:19 ehydra Re: New file uploaded to emrfd kb1gmx schrieb:
> Are the resistors on the bases real components or for modeling the series R of the transistors base? If they are real the circuit willIf you look at their magnitude and if I didn't make an error, then this
> exhibit degeneration and the transistors will exhibit more stored charge. If its modeling I'd expect to see additional Re.
>
resistors are irrelevant.
They are left over from the former (proposed faster) circuit after
findinf the 100 ohms problem to discuss.
Just handy to let in.
- Henry
--
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chris3trask <christrask@earthlink.net>5273 2010-09-28 06:27:13 kb1gmx Re: New file uploaded to emrfd 5276 2010-09-28 07:19:46 Chris Trask Re: New file uploaded to emrfd >that has
> Chris, Great paper.
>
> I'm trying out the first version using silicon junction diodes at HF as
> a decently high OIP with reasonable drive. The application is transceivermixer
> for a non contest radio with the emphasis of using most of the availableIF gain
> to drive the TX chain.lower
> A 10db (over a usual DBM) larger signal from the mixer makes for a overall
> gain requirement to reach power out and may even save a stage. Beats theold
> CA3028 as a higher output mixer.I really miss those CA3000 series transistor arrays. Best thing that
>
ever happened to discrete component designers. Some are still available in
SOIC form, and I hold on to my stock of DIP versions for dear life.
Let us know how your version of the X-Môde mixer works out, good or bad.
The more data from more builders the better.
I'm pounding away at a passive (diode) version of the H-Môde mixer. I
tried this many years ago, and after the success with the X-Môde mixer I
thought I'd give it another try. Tested it this morning with better diodes
and it's just as lousy as before. But, if I add a fourth transformer I
think I can remedy the problem.
I both like and dislike the H-Môde mixer. It has a frequency limitation
due entirely to the FETs, but the fact that their sources are all grounded
is attractive. Making it with diodes will take care of the frequency
limitation.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/5278 2010-09-28 09:11:33 ehydra Re: H-mode mixer Hello Chris -
Your paper should add the measurement frequency.
-
What if the H-Moder mixer is realized with JFETs like J309 ? They are
very fast. It is clear that the maximum load should then be reduced. But
more frequency less IP3 is required.
Another way is to test the Potato Semi multiplexers.
I'm interested to get a couple of the 74G74 and one of the multiplexers
if their is a group buy.
-
And why do you wrote 'Môde' ? What is the difference to 'Mode'?
- Henry
--
ehydra.dyndns.info
Chris Trask schrieb:
> I both like and dislike the H-Môde mixer. It has a frequency limitation
> due entirely to the FETs, but the fact that their sources are all grounded
> is attractive. Making it with diodes will take care of the frequency
> limitation.
>5280 2010-09-28 09:18:14 William Carver Re: New file uploaded to emrfd H mode's conceptual virtue is having all FET sources at ground potential
so signals do not modulate the gate-source LO (switching) voltage.
Diodes, being two-terminal devices, MUST have LO and signal both flowing
through the diode. Whether that diode is (for example) in a bridge
configuration or in an H configuration you still have both signals in
the diode at the same time. There is no isolation between LO and signal
meshes regardless of the topology. So what virtue do you see in the
H-configuration with diodes?
Regards - Bill - W7AAZ5281 2010-09-28 10:03:46 Chris Trask Re: New file uploaded to emrfd >Breaching the high frequency limitation of the H-Môde mixer, if nothing
> H mode's conceptual virtue is having all FET sources at ground potential
> so signals do not modulate the gate-source LO (switching) voltage.
>
> Diodes, being two-terminal devices, MUST have LO and signal both flowing
> through the diode. Whether that diode is (for example) in a bridge
> configuration or in an H configuration you still have both signals in
> the diode at the same time. There is no isolation between LO and signal
> meshes regardless of the topology. So what virtue do you see in the
> H-configuration with diodes?
>
else.
The X-Môde mixer has a virtual ground for the LO and IF signals at the
diode common cathode connections, and this may be why the X-Môde mixer has
far better IMD performance than the diode ring mixer. The question now
remains as to what effect grounding the diode cathodes will have. I'll know
before the day is over.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/5282 2010-09-28 10:47:46 ehydra Re: New file uploaded to emrfd Chris Trask schrieb:
> Breaching the high frequency limitation of the H-Môde mixer, if nothingI'm a litte amused that the multi-billion military and space industry
> else.
>
> The X-Môde mixer has a virtual ground for the LO and IF signals at the
> diode common cathode connections, and this may be why the X-Môde mixer has
> far better IMD performance than the diode ring mixer. The question now
> remains as to what effect grounding the diode cathodes will have. I'll know
> before the day is over.
>
doesn't already cleared all reasonable questions one simple man can ask
regarding mixers.
On the other side I'm sure Chris knows most of the important papers.
Maybe the frequencies are too low?
- Henry
--
ehydra.dyndns.info5283 2010-09-28 12:02:46 Chris Trask Re: New file uploaded to emrfd >the
> > The X-Môde mixer has a virtual ground for the LO and IF signals at
> > diode common cathode connections, and this may be why the X-Môde mixerhas
> > far better IMD performance than the diode ring mixer. The question nowknow
> > remains as to what effect grounding the diode cathodes will have. I'll
> > before the day is over.That didn't take long. I worked up a synthesis for a diode mixer
>
yesterday having all the diode cathodes grounded, then modified my earlier
passive H-Môde prototype to add a fourth transformer. Performance is
better, but the OIP3 is more than 10dB lower than for the X-Môde mixer with
the same diodes.
It's not at all useless. Just another bad example.
>Many reasons why not. From my first-hand experiences, most of it has to
> I'm a litte amused that the multi-billion military and space industry
> doesn't already cleared all reasonable questions one simple man can ask
> regarding mixers.
>
> On the other side I'm sure Chris knows most of the important papers.
>
> Maybe the frequencies are too low?
>
do with managerial and interpersonal politics. What Alexis de Tocqueville
observed in the early 19th century ("Democracy in America", 1835) remains
alive and well: We still drag the individual down to the lowest common
denominator. Well, most individuals. I refuse to be assimilated.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/5286 2010-09-28 12:29:25 ehydra Re: New file uploaded to emrfd Chris Trask schrieb:
> That didn't take long. I worked up a synthesis for a diode mixerH or X, that is the question.
> yesterday having all the diode cathodes grounded, then modified my earlier
> passive H-Môde prototype to add a fourth transformer. Performance is
> better, but the OIP3 is more than 10dB lower than for the X-Môde mixer with
> the same diodes.
>
> It's not at all useless. Just another bad example.
>
>Engineering is to get the most of a minimum. Seems that is assimilation
> Many reasons why not. From my first-hand experiences, most of it has to
> do with managerial and interpersonal politics. What Alexis de Tocqueville
> observed in the early 19th century ("Democracy in America", 1835) remains
> alive and well: We still drag the individual down to the lowest common
> denominator. Well, most individuals. I refuse to be assimilated.
>
indeed.
- Henry
--
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chris3trask <christrask@earthlink.net>5983 2011-04-01 09:49:17 Gian Re: New file uploaded to emrfd 5984 2011-04-01 10:57:01 Chris Trask Re: New file uploaded to emrfd >Your enthusiasm betrays you. It's not the diode version of the H-Môde
> congratulations for your h-mode diode mixer configuration. We have always
> to take note of interesting mixer configurations. The conversion losses
> are interesting if around 1dB lower than the real G3SBI H-Mode Mixer. It
> would be interesting to try it on VHF and UHF as it could help people to
> have a receiver solution covering from the HF to the UHF.
>
> Please forgive me if I like to return with comments on the H-Mode Mixer,
> as I feel many hams have not much clear what it is and what it is doing.
>
mixer that gets the better conversion loss, it's my own configuration of
splitting up the ring of the diode ring mixer that does. As I stated very
clearly in that paper, that the H-Môde diode mixer does not perform any
better than the diode ring mixer, which has been consistent with all of the
testing I have done with H-Môde mixers to date. All in all, the H-Môde
mixer does not perform any better than the diode ring mixer.
We've had this argument a few times in the past, and I will restate it
here so that there is no misunderstanding: An H-Môde mixer made with the
exact same parts as a diode ring mixer, be it diodes or MOSFETs as the
switching devices, does not perform any differently than the diode ring or
FET ring mixer. It does not surprise me in the least that those of you who
have promoted the H-Môde mixer have never performed or published an
apples-vs-apples comparison of your own. I have, and the results have
always been clearly stated.
My mixer, which is described in detil in that paper, bears no
resemblance whatsoever to any form of the H-Môde mixer, and I would much
prefer that you not make use of my work in an effort to promote the H-Môde
mixer. My work, as described in that paper, is none other than my own.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/5985 2011-04-01 11:41:06 n7ve Re: Split ring diode mixer reduced loss? Chris, do you have any better understanding as to why the conversion loss is 3 dB lower with your split ring mixer?
It does seem advantageous that you have taken two diodes in series (in the ring) and turned them into two diodes in parallel (in the split ring) from a loss reduction standpoint. Do you think that is all that is going5987 2011-04-01 12:30:39 Chris Trask Re: Split ring diode mixer reduced loss? >here?
> Chris, do you have any better understanding as to why the conversion loss
> is 3 dB lower with your split ring mixer?
>
> It does seem advantageous that you have taken two diodes in series (in the
> ring) and turned them into two diodes in parallel (in the split ring) from
> a loss reduction standpoint. Do you think that is all that is going on
>Yes, that's pretty much what is taking place. I've been working on a
theory section to add to the paper so as to show in detail why there is such
a significant difference in conversion loss performance.
Basically, at any given time one end of the T3 secondary is shunted to
ground by a parallel pair of diodes, while the other end of the secondary
sees a load of two package capacitances (Cp in Fig. 4) plus a balanced pair
of leakage inductances of the T1 (or T2) secondary to ground. Since there
is a pair of Cp plus the T2 (or T1) leakage inductances to ground at both
ends of the secondary at all times, those parasitic capacitances and
inductances are pretty much balanced out and you're left with the remaining
four incremental components of the two diodes in parallel. I'll have the
details of all this worked out before long.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/5989 2011-04-01 15:07:19 William Carver Re: New file uploaded to emrfd The MOSFET H-mode mixer topology is basically different from ANY diode
mixer. The sources are grounded and the gate-source potential is
unaffected by the signals. There is NO diode equivalent of the H-mode
mixer's topology, it requires a three terminal device.
In ANY topology diode mixers MUST have both signal and LO flowing
together in the diodes. The switching instant will ALWAYS occur due to
the sum of the signal(s) and LO.
Yes, diode mixers work to frequencies far above what can be done with
bus switch ICs. I have a plastic drawer with MCL diode mixers when I
want a VHF/UHF mixer. And when I need higher intercept at VHF I'll and
be looking at your arrangement to try to do better.
But for HF use H-mode can't be beat. H-mode is not just a lot of bang
for the buck (IE, easy to build and works well), it gets within 1 dB of
the theoretical conversion loss (3.92 dB) of a perfect commutation
mixer.
So go ahead and pitch your mixer, I have no problem with that.
But panning the H-mode is pointless: for HF the H-mode really IS better.
Bill - W7AAZ5990 2011-04-01 15:33:41 Chris Trask Re: New file uploaded to emrfd >According to all the testing I've done, the H-Mode mixer is not much
> But for HF use H-mode can't be beat. H-mode is not just a lot of bang
> for the buck (IE, easy to build and works well), it gets within 1 dB of
> the theoretical conversion loss (3.92 dB) of a perfect commutation
> mixer.
>
> So go ahead and pitch your mixer, I have no problem with that.
> But panning the H-mode is pointless: for HF the H-mode really IS better.
>
different from a ring mixer (diode or FET) made with the exact same parts.
You really have to ask yourself why the promoters of the H-Mode mixer
have never accomplished and published a direct comparison of their own,
using the exact same parts for both circuits. I did it three or more years
ago and found very little difference if any.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/5997 2011-04-02 10:57:42 Chris Trask Re: Split ring diode mixer reduced loss? >loss
> >
> > Chris, do you have any better understanding as to why the conversion
> > is 3 dB lower with your split ring mixer?the
> >
> > It does seem advantageous that you have taken two diodes in series (in
> > ring) and turned them into two diodes in parallel (in the split ring)from
> > a loss reduction standpoint. Do you think that is all that is going onsuch
> > here?
> >
>
> Yes, that's pretty much what is taking place. I've been working on a
> theory section to add to the paper so as to show in detail why there is
> a significant difference in conversion loss performance.pair
>
> Basically, at any given time one end of the T3 secondary is shunted to
> ground by a parallel pair of diodes, while the other end of the secondary
> sees a load of two package capacitances (Cp in Fig. 4) plus a balanced
> of leakage inductances of the T1 (or T2) secondary to ground. Since thereremaining
> is a pair of Cp plus the T2 (or T1) leakage inductances to ground at both
> ends of the secondary at all times, those parasitic capacitances and
> inductances are pretty much balanced out and you're left with the
> four incremental components of the two diodes in parallel. I'll have theNow that I've had time to sort out the theory details, I was reminded of
> details of all this worked out before long.
>
some additional testing that I did when I first came up with the split-ring
mixer. There's very little difference between how this and a diode-ring
mixer operate. In both cases, one pair of diodes is turned "on" and the
other pair "off". The "on" pair shorts one end of the RF/IF transformer
secondary to ground while the other end is left open. What is different
between these two is that the LO source impedance seen by the diodes is
200-ohms for the split-ring mixer while for the diode-ring mixer it's
100-ohms. I did an additional test back then, replacing the T1 and T2 1:4
baluns with 1:1 baluns, so that the diodes would see a 50-ohm LO source
impedance. When I did that, the conversion loss was approximately that of
the diode-ring mixer.
When I was designing mixers for microwave frequencies, there was always
the issue of matching the diodes to the power splitter/combiner. It was
quite different when using branchline couplers as the diode ports were
50-ohms and you had to add a short length of high-impedance line plus a
small matching stub to get the correct conjugate match. Manufacturers data
sheets don't give you much to work with in terms of conversion loss vs. LO
source impedance. HP did way back then, but even then we would measure them
with a VNA, which was a bit tricky due to the power levels needed. If you
weren't careful you could easily burn out the harmonic converter.
I will have to investigate this further so as to determine the best LO
source resistance, and I might be able to do that by way of adding simple
autotransformers to the LO port rather than having to deal with bizarre
turns ratios for T1 and T2. Given the fact that the conversion loss is
close to the theoretical minimum, it may turn out that this configuration
may not be ideal but it is practical and easily reproduced.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
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chris3trask <christrask@earthlink.net>6038 2011-04-04 14:49:10 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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chris3trask <christrask@earthlink.net>6179 2011-04-24 09:44:13 kb1gmx Re: New file uploaded to emrfd Chris,
The file on my linux system is not viewable. It loads but the interconnecting lines are 1pixel wide and required much manipulation to make them visible. Didn't look any better6181 2011-04-24 11:05:23 Chris Trask Re: New file uploaded to emrfd >Hmmmm... I'm looking at it with Acrobat 3.0, Acrobat 6.0, and Foxit
> The file on my linux system is not viewable. It loads but the
> interconnecting lines are 1pixel wide and required much manipulation
> to make them visible. Didn't look any better on the Macbook.
>
Reader on Win98SE and WinXP, where it comes out fine. I'll do an AutoCAD
schematic later after I've played with this idea some more.
Chris6182 2011-04-24 11:43:31 victor Re: New file uploaded to emrfd Chris,
If you look at fig 6 in my article you have an amplifier with two power splitters. I could not make it stable so I dropped one. I retained the power splitter at the input because by making the power splitter asymmetric, I gain both a defined input impedance and low noise.
In your amplifier you took the original amplifier with the two power splitters and then dropped the input power splitter and retained the output one, so by using a 1:1 power splitter it works closer to ideal and you gain a high reverse isolati6183 2011-04-24 11:53:01 victor Re: New file uploaded to emrfd Forgot to add that in your circuit you gain both high reverse isolation and a defined output impedance.
Victor - 4Z4ME
6184 2011-04-24 12:37:53 Chris Trask Re: New file uploaded to emrfd >In your input splitter, the two input voltages are of opposite polarity,
> >
> > Chris,
> > If you look at fig 6 in my article you have an amplifier with two
> > power splitters. I could not make it stable so I dropped one. I
> > retained the power splitter at the input because by making the power
> > splitter asymmetric, I gain both a defined input impedance and low
> > noise.
> > In your amplifier you took the original amplifier with the two power
> > splitters and then dropped the input power splitter and retained the
> > output one, so by using a 1:1 power splitter it works closer to ideal
> > and you gain a high reverse isolation at the price of worse noise
>
> Forgot to add that in your circuit you gain both high reverse isolation
> and a defined output impedance.
>
which means that power is being dissipated by the isolation resistor, and
there are also losses in the transformer core due to the generation of flux
caused by the voltages being of opposite polarity. This form of power
splitter has outputs with equal phase and magnitude when the loads are equal
and signal is applied to the common terminal.
To prevent losses and excess noise, both inputs should be of equal
magnitude and phase so that there is no loss in the isolation resistor and
no generation of flux in the transformer core. I solved this part of the
problem I was having with your circuit by moving the splitter to the output.
Now, I'm seeing reverse isolation in PSpice of 50dB or more. In your
circuit you left out the termination resistor of the common port, which
degrades the isolation considerably.
Your circuit is an inspirational innovation, and now I need to further
my adaptati6185 2011-04-24 13:26:52 victor Re: New file uploaded to emrfd The reason that the power splitter at the input works with input signals at opposing polarity is because the transistor base is at virtual ground (if gain is high enough) just as in a OpAmp inverting amplifier. However if the power splitter is assimetric with a high transforming ratio the resistor value is large and its contribution to noise figure is very small, almost negligible.
Victor - 4Z4ME
6186 2011-04-24 14:24:54 Chris Trask Re: New file uploaded to emrfd >Yes, I understood that when I first saw it, but the output return loss
> The reason that the power splitter at the input works with input
> signals at opposing polarity is because the transistor base is at
> virtual ground (if gain is high enough) just as in a OpAmp
> inverting amplifier. However if the power splitter is assimetric
> with a high transforming ratio the resistor value is large and
> its contribution to noise figure is very small, almost negligible.
>
is less than 1dB, which makes it almost impossible to use with a passive
filter, which requires good terminations at both ends, particular narrow
bandwidth bandpass filters and high- or lowpass filter with sharp transition
characteristics.
Another item was the lack of a proper termination resistor at the
splitter output terminal. I found that without it you lose almost 20dB of
reverse isolation and about 12dB of return loss in the study case that I
use.
I've been going back and forth between these two designs (yours and
mine), hoping to find some inspiration for eliminating the series and shunt
feedback resistors in my design. Using a transformer at both ends does not
help as the connection between them is floating.
Chris6187 2011-04-24 14:50:04 victor Re: New file uploaded to emrfd The output should have good return loss because the feedback is a parallel feedback at output lowering the collector output impedance to a low value, and with the additional series resistor at the output it brings the output impedance around 50 Ohm.
Victor - 4Z4ME
6188 2011-04-24 15:33:00 Chris Trask Re: New file uploaded to emrfd >loss
> >
> > >
> > > The reason that the power splitter at the input works with input
> > > signals at opposing polarity is because the transistor base is at
> > > virtual ground (if gain is high enough) just as in a OpAmp
> > > inverting amplifier. However if the power splitter is assimetric
> > > with a high transforming ratio the resistor value is large and
> > > its contribution to noise figure is very small, almost negligible.
> > >
> >
> > Yes, I understood that when I first saw it, but the output return
> > is less than 1dB, which makes it almost impossible to use with a passivetransition
> > filter, which requires good terminations at both ends, particular narrow
> > bandwidth bandpass filters and high- or lowpass filter with sharp
> > characteristics.of
> >
> > Another item was the lack of a proper termination resistor at the
> > splitter output terminal. I found that without it you lose almost 20dB
> > reverse isolation and about 12dB of return loss in the study case that Ishunt
> > use.
> >
> > I've been going back and forth between these two designs (yours and
> > mine), hoping to find some inspiration for eliminating the series and
> > feedback resistors in my design. Using a transformer at both ends doesnot
> > help as the connection between them is floating.I added the needed termination resistors to your Fig. 6, and I see much
> >
>
> The output should have good return loss because the feedback is a
> parallel feedback at output lowering the collector output impedance
> to a low value, and with the additional series resistor at the output
> it brings the output impedance around 50 Ohm.
> Victor - 4Z4ME
>
better RL and isolation than I do without them, same as in the other cases.
Those resistors make power supply decoupling very simple, and I see almost
no variation in the phase margin between having them or not. Adding the
resistor between the splitters upsets the gain some. Since you said they
were needed for stability reasons, could you also attain that stability with
a ferrite bead at the base or collector of the transistor? Also, adding the
needed termination resistors may accomplish the same thing.
In using what I've modeled these past couple of days, my inclination
would be to use your Fig 6 for NF performance as any of those require two
transformers and you might as well get the best performance for the buck,
though I still have concerns about having inputs of opposite phase. For
oscillator followers or applications where NF is not a serious issue, I
would probably use mine as it only requires a single transformer.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/6189 2011-04-25 00:06:29 victor Re: New file uploaded to emrfd In practice the transformers are more complicated than just coupled inductors and their parasitic components will induce instability, thats the reas6190 2011-04-25 06:33:29 ha5rxz Re: New file uploaded to emrfd Victor, a quick question about Figure 8 in your article. On transformer T1 is 10:1 the turns ratio or impedance ratio?
Peter HA5RXZ6191 2011-04-25 08:28:00 victor Re: New file uploaded to emrfd Turns ratio.
Victor - 4Z4ME
6192 2011-04-25 10:10:51 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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chris3trask <christrask@earthlink.net>6193 2011-04-25 11:17:09 victor Re: New file uploaded to emrfd Chris,
If you want to simulate my circuit as is, then you have to remove your modifications (25 Ohm resistors at base or collector), add the 33 Ohm resistor in series with the output and use a higher Ft transistor.
Victor - 4Z4ME
6194 2011-04-25 12:41:14 Chris Trask Re: New file uploaded to emrfd > Chris,If I were to do that, then I would not be making a valid side-by-side
> If you want to simulate my circuit as is, then you have to remove your
> modifications (25 Ohm resistors at base or collector), add the 33 Ohm
> resistor in series with the output and use a higher Ft transistor.
>
comparison. Removing the splitter termination resistor(s) degrades the
isolation and the return losses. I added them so as to obtain the best
possible performance and to make a comparison where all three had been
optimized. Adding that 33-ohm resistor at the output decreases the gain by
4.3dB, which has quite an impact on the NF. The output noise level
decreases, but mostly because it's being attenuated by the added resistor.
If I take your single-transformer design, add the 33-ohm output
resistor, add the 130-ohm feedback resistor, change the transformer to 1:2,
change the isolation resistor to 150-ohms, and eliminate the termination
resistor, I get the following:
Gain (10MHz) 20.1dB
Isolation -40.7dB
Input Return Loss -7.7dB
Output Return Loss -20.7dB
Output Noise (10MHz) 11.59nV
3dB Cutoff 28.5MHz
If I simply add the termination resistor (45.5 ohms), I get:
Gain (10MHz) 19.2dB
Isolation -45.7dB
Input Return Loss -6.6dB
Output Return Loss -27.9dB
Output Noise (10MHz) 15.41nV
3dB Cutoff 26.6MHz
Perhaps I should add these two variations to that document.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/6195 2011-04-25 14:03:08 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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victorkoren <vkoren@actcom.net.il>6196 2011-04-25 14:09:54 victor Re: New file uploaded to emrfd I have uploaded a file (Koren 12 dB amplifier simulation.pdf) containing full simulation of my amplifier including non-linear and noise figure simulations.
Some components were optimized (small value changes) to get optimum results. I do think that the amplifier has excellent performance. Input and output return loss are better than -20db, very low noise figure, 40dBm output IP3, and 38 db reverse isolati6197 2011-04-25 14:26:15 Chris Trask Re: New file uploaded to emrfd >And when will you provide us with a full comparison with the other two?
> I have uploaded a file (Koren 12 dB amplifier simulation.pdf) containing
> full simulation of my amplifier including non-linear and noise figure
> simulations.
> Some components were optimized (small value changes) to get optimum
> results. I do think that the amplifier has excellent performance. Input
> and output return loss are better than -20db, very low noise figure,
> 40dBm output IP3, and 38 db reverse isolation which should be enough
> for most uses.
>
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/6198 2011-04-25 14:33:00 victor Re: New file uploaded to emrfd I posted an old simulation that I did at work when I had access to ADS. Now I don't have this access. But still, this amplifier satisfies me so why compare. I don't need higher reverse isolati6199 2011-04-25 14:47:03 Chris Trask Re: New file uploaded to emrfd >You seem to have missed the fact that my simulation demonstrated that I
> I posted an old simulation that I did at work when I had access to
> ADS. Now I don't have this access. But still, this amplifier satisfies
> me so why compare. I don't need higher reverse isolation and certainly
> would not pay with higher noise figure or worse IP3.
>
get better output noise, which equates to better NF. And since I don't have
a 4dB attenuator on the output I will very likely see better IP3.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/6200 2011-04-26 01:26:21 victor Re: New file uploaded to emrfd Chris,
Remember that noise figure is measyured at amplifier input.
The calculation of NF from output voltage is:
NF=10*Log(((VnAmpOut/Gamp)/VnThermalNoise)^2)
VnThermalNoise on 50Ohm at 300 degrees Kelvin is 0.91 nV/Sqrt(Hz)
For you 3 amplifier simulations:
1) G=-0.5dB VnAmpOut=2.051 nV/Sqrt(Hz) --> NF=7.06dB
2) G=-0.2dB VnAmpOut=2.878 nV/Sqrt(Hz) --> NF=10.2dB
3) G=0.04dB VnAmpOut=2.897 nV/Sqrt(Hz) --> NF=6.34dB
Which certainly is much higher than NF=1.3dB.
If your amplifier purpose is only isolati6201 2011-04-26 05:59:57 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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ha5rxz <ha5rxz@gmail.com>6205 2011-04-26 06:33:45 Chris Trask Re: New file uploaded to emrfd >The comparison being made with three different amplifiers with about 0dB of gain, as I've stated more than once. You've provided further evidence that I have devised an amplifier that is quieter than yours. Thank you for that.
>1) G=-0.5dB VnAmpOut=2.051 nV/Sqrt(Hz) --> NF=7.06dB
>2) G=-0.2dB VnAmpOut=2.878 nV/Sqrt(Hz) --> NF=10.2dB
>3) G=0.04dB VnAmpOut=2.897 nV/Sqrt(Hz) --> NF=6.34dB
>
>That was for an amplifier with 12dB of gain using an MRF586 transistor, which is not a valid comparison to amplifiers having 0dB of gain using 2N2222 transistors. When making comparisons such as this, you use the same transistor in all cases operating at the same bias conditions. If I change the gain of my amplifier to 6dB, the NF drops to 3.85dB, and it will continue to drop as I increase the gain.
>Which certainly is much higher than NF=1.3dB.
>
Now there's the matter if IMD performance. In case #1, your single transformer design, you added a 33-ohm resistor at the output to compensate for the very low output impedance of the amplifier proper. That resistor corrects the output RL problem, but it also acts as a 4dB attenuator, which increases the NF and reduces both the gain and the IP3 performance. In cases #2 (your 2-transformer design) and #3 (my design) there is no output transistor, so the NF, gain, and IP3 are not adversely impacted.
Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
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ha5rxz <ha5rxz@gmail.com>9821 2014-03-10 10:20:21 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /N5EM - SA Info/70 mHz LPF - 100 kHz through 550 mHz Swseep.pdf
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Description : Sweep of SMT LPF
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n5emqrp <n5emqrp@gmail.com>10063 2014-05-24 07:51:57 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/Find VFO drift.docx
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : Find Temp drift in a VFO module and ground plane
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jorschei <kthkit@xs4all.nl>10117 2014-06-29 13:46:54 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/7 MHz E amplifier.gif
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : CALCULATION 7 CLASS E AMPLFIER
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jorschei <kthkit@xs4all.nl>10231 2014-08-10 11:27:45 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /G3WIE/LZ1OV RFamp.pdf
Uploaded by : g3wie <g3wie@crystalhobs.org.uk>
Description : In memoriam: Another of Stefan's designs. RIP.
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g3wie <g3wie@crystalhobs.org.uk>10242 2014-09-10 00:29:38 augustinetez Re: New file uploaded to emrfd For those that have read this pdf and wondered about the original circuit by EU1TT, it can be found here:You will need Google Translate or similar as it is written in Russian.Terry VK5TM10252 2014-09-13 19:13:09 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /VU2ESE/guanella2.png
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Description : guanella experiments
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ashhar_farhan <farhanbox@gmail.com>10590 2014-12-12 04:12:15 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/EXAMPLE OF AN FUNCTIONAL MODUL 34x20 mm SIZE.BMP
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : Experimental functional adapter modul with 10SMOP chip and 0603 components
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jorschei <kthkit@xs4all.nl>10684 2014-12-30 04:03:56 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/AAVID HEATSINK.bmp
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Description : AAVID PCB SMD HEATSINK FOR FETS OR TRANSISTORS
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jorschei <kthkit@xs4all.nl>10805 2015-03-12 03:12:15 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/Si5351A CLOCK GENERATOR VFO/AN OTHER Si5351A DIL MODULE AS MIXER VFO..doc
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Description : AN OTHER Si5351A AS MIXER VFO
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jorschei <kthkit@xs4all.nl>10841 2015-03-14 11:17:27 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KB1GMX/ImageRej_n_SSB_mixers.pdf
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Description : WJ tech note for image rejecting mixers
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kb1gmx <kb1gmx@arrl.net>11047 2015-05-01 12:52:23 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/SDR PSoC5 RECEIVER 74CBTLV3253 I&Q MIXER.jpg
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : Test setup SDR receiver with Freesoc mini PSoC5 signal processing and 74CBTLV3253 I&Q mixer and Si5351A VFO.
SSB soundfiles on noisy 80 meterband and AM on 1008KHz MW
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jorschei <kthkit@xs4all.nl>11048 2015-05-01 12:55:35 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/80m NAN_2 PSoC sound.mp3
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Description : SSB on noisy 80 meter, ham communication demodulated by the PSoC5 processor recorded by PA0RWE test set up.
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jorschei <kthkit@xs4all.nl>11049 2015-05-01 13:00:09 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/1008 AM PSoC sound file.mp3
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Description : AM soundfile demodulated by PSoC5 on 1008KHzMW , front mixer 74CBTLV3253 and Si5351A integrated VFO on the right green PCB.
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jorschei <kthkit@xs4all.nl>11056 2015-05-02 10:27:40 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/S-8001-BI DIRECTIONELE MF-A.GIF
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : Bi-directional IF amplfier with FET's type A
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jorschei <kthkit@xs4all.nl>11057 2015-05-02 10:28:00 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/S-8003-BI DIRECTIONELE MF-C.GIF
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Description : Bi-directional IF amplfier with FET's type C
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jorschei <kthkit@xs4all.nl>11058 2015-05-02 10:28:54 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/s-8007-WERKBLAD-BI-DIR-MF BF1005 455KHz.GIF
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Description : Bi-directional IF amplfier with BF1005 FET's
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jorschei <kthkit@xs4all.nl>11059 2015-05-02 10:30:16 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/S-8010-WERKBLAD-BI-DIR-MF BF1005 8 MHz.GIF
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : Example of a Bi directional IF strip experimental
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jorschei <kthkit@xs4all.nl>11063 2015-05-05 03:04:35 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/S-8010-WERKBLAD-BI-DIR-MF BF1005 8 MHz.BMP
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : S-8010-WERKBLAD-BI-DIR-MF 8 MHz with BF1005
Clearer bitmap version
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jorschei <kthkit@xs4all.nl>11064 2015-05-05 20:16:39 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /WERKBLAD-BI-DIR-MF BF1005 8 MHz.png
Uploaded by : vasilyivanenko <vasilyivanenko@yahoo.ca>
Description : File : /PE1KTH/S-8010-WERKBLAD-BI-DIR-MF BF1005 8 MHz.png
originally Uploaded by : jorschei on May 5
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vasilyivanenko <vasilyivanenko@yahoo.ca>11065 2015-05-05 21:09:32 vasilyivanenko Re: New file uploaded to emrfd Thanks -- sorry that raw bmp file hurt my limited phone data plan. I compressed that file to a lossless LZW format -- png [ filesize = 44.7 kB ]. I wanted to re-post it, but wonder if it is copyright?
Thanks
Todd11066 2015-05-06 03:57:30 jorschei Re: New file uploaded to emrfd Feel free to use the data in my EMRF PE1KTH files for non commercial purpose.
73"Joris PE1KTH
11070 2015-05-06 14:14:57 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /K1RF CW waveshaping lookup table.xlsx
Uploaded by : k1rf_digital_steve <sbdick@optonline.net>
Description : Based on Blackman Harris Window. See QEX May/June 2006 "CW Shaping in DSP software" by Alex Shovkoplyas, VE3NEA.
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k1rf_digital_steve <sbdick@optonline.net>11093 2015-05-17 08:12:01 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KB1GMX/Twisted-Wire_Quadrature_Hybrids.pdf
Uploaded by : kb1gmx <kb1gmx@arrl.net>
Description : a great article on twisted wire hybrids used in many phasing radios.
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kb1gmx <kb1gmx@arrl.net>11094 2015-05-17 08:13:54 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KB1GMX/Phasing_SSB_Generator_.pdf
Uploaded by : kb1gmx <kb1gmx@arrl.net>
Description : Article on dong a phasing TX (or can be used as RX reverising RF and audio paths) using passive means.
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kb1gmx <kb1gmx@arrl.net>11095 2015-05-17 08:17:09 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KB1GMX/minir2.pdf
Uploaded by : kb1gmx <kb1gmx@arrl.net>
Description : collected information for MiniR2 by Kanga includes a bunch of supporting articles.
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kb1gmx <kb1gmx@arrl.net>11143 2015-06-07 09:49:39 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KB1GMX/k8ki-mixer-08-2009.pdf
Uploaded by : kb1gmx <kb1gmx@arrl.net>
Description : A presentation from 2009 on high level mixers used in compatition grade radios (of the day). Some of them still apply.
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kb1gmx <kb1gmx@arrl.net>11150 2015-06-09 06:03:30 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/Pocked Si4835 dsp receiver bottom view.JPG
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : Pocket size Si4835 receiver
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jorschei <kthkit@xs4all.nl>11151 2015-06-09 06:05:04 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/Pocked Si4835 dsp receiver top view.JPG
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Description : Pocket Si4835 bottom view receiver
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jorschei <kthkit@xs4all.nl>11152 2015-06-09 06:07:26 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/S-1012-02 AM-FM-SW Si4835 LI-ION Schematic.GIF
Uploaded by : jorschei <kthkit@xs4all.nl>
Description : Pocket Si4835 AM-FM-SW li-ion schematic receiver
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jorschei <kthkit@xs4all.nl>11218 2015-06-21 13:14:44 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PCB LAYOUT.jpg
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lmeeny <emachak@stny.rr.com>11219 2015-06-21 13:15:53 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /VOLTAGE REGULATORS.bmp
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lmeeny <emachak@stny.rr.com>11220 2015-06-21 13:16:10 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /SAMPLING CLOCKS.bmp
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lmeeny <emachak@stny.rr.com>11221 2015-06-21 13:16:25 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /RF PREAMP.bmp
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lmeeny <emachak@stny.rr.com>11222 2015-06-21 13:16:48 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /QUAD DETECTOR.bmp
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lmeeny <emachak@stny.rr.com>11223 2015-06-21 13:17:04 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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lmeeny <emachak@stny.rr.com>11362 2015-07-25 03:18:16 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/Si5351A CLOCK GENERATOR VFO/S-1005-01 PSoC5 HF- BLOCKSCHEMATIC.GIF
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Description : PSoC5 receiver with RF front mixer
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jorschei <kthkit@xs4all.nl>11363 2015-07-25 03:19:21 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : 74CBTLV3253 mixer with Si5351A clock generator VFO
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jorschei <kthkit@xs4all.nl>11365 2015-07-25 03:30:25 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : Block schematic PSoC5 RX with Si5351A
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jorschei <kthkit@xs4all.nl>11366 2015-07-25 03:31:21 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>11374 2015-07-27 07:39:16 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>11375 2015-07-27 07:44:32 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>11376 2015-07-27 07:48:31 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>11377 2015-07-27 08:07:04 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH/S-1005-03 PSoC5 ADAPER 52 x 52 MM MODULE.GIF
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Description : PSoC5 processor for SDR stand alone RX
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jorschei <kthkit@xs4all.nl>11378 2015-07-27 20:15:59 vasilyivanenko Re: New file uploaded to emrfd Nice work. Thank-you.11379 2015-07-30 03:35:14 jorschei Re: New file uploaded to emrfd Hello, the PE1KTH files are closed.
73' PE1KTH
11392 2015-08-04 18:34:51 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jmlynesjr <jmlynesjr@gmail.com>11393 2015-08-04 18:35:37 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jmlynesjr <jmlynesjr@gmail.com>11400 2015-08-06 04:42:42 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : PIC controled module for Si5351A synthesizer pocket RTX
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jorschei <kthkit@xs4all.nl>11401 2015-08-06 04:45:10 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>11402 2015-08-06 04:48:31 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : Mini Si5351A +PIC+OLED module for pocket RTX under contruction
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jorschei <kthkit@xs4all.nl>11427 2015-08-07 02:06:08 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : Si4835 report
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jorschei <kthkit@xs4all.nl>11428 2015-08-07 02:07:32 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH experiments/AM-FM Si4835 ONTVANGER- V2- PCB 001.jpg
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Description : The PCB's for the portable Si4835 receiver
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jorschei <kthkit@xs4all.nl>11429 2015-08-07 02:10:16 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : Completed Si4835 receiver in housing
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jorschei <kthkit@xs4all.nl>11430 2015-08-07 02:16:09 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH experiments/S-1012-02 Si4835 RECEIVER SCHEMA.GIF
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Description : Si4835 receiver schematic
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jorschei <kthkit@xs4all.nl>11449 2015-08-08 06:06:33 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : Red active antenna book
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jorschei <kthkit@xs4all.nl>11450 2015-08-08 06:07:02 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>11451 2015-08-08 06:08:04 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : My broadband closed loop antenna
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jorschei <kthkit@xs4all.nl>11452 2015-08-08 06:16:07 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>11460 2015-08-09 05:31:05 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>11582 2015-09-05 07:04:51 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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ravimiranda <ravimiranda@gmail.com>11891 2015-11-15 19:01:04 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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bob_ledoux <bobledoux@proaxis.com>11913 2015-11-26 11:25:46 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /2sc5337.pdf
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Description : possible post mixer amp, possible qrp output transistor
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km6sn <rod.km6sn@wildblue.net>11950 2015-12-06 13:53:38 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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km6sn <rod.km6sn@wildblue.net>12161 2016-01-05 06:13:24 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH experiments/S-1005-08 74CBTLV3253 MIXER MODULE+Si5351A.GIF
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Description : Tayloe front end 100Khz - 30MHz
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jorschei <kthkit@xs4all.nl>12298 2016-02-08 09:57:26 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jimk8rz <k8rz@etcmail.com>12341 2016-02-11 12:20:44 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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km6sn <rod.km6sn@wildblue.net>12361 2016-02-15 05:13:29 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jimk8rz <k8rz@etcmail.com>12377 2016-02-15 12:23:20 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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kerrypwr <planningpower@iprimus.com.au>12378 2016-02-15 12:23:35 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /VK2TIL (kerrypwr)/RF Transformers/Philips ECO7213 HF Transformer Design Part 2.pdf
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kerrypwr <planningpower@iprimus.com.au>12437 2016-02-23 04:35:58 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /FSA3157-Filters-switching.jpg
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Description : Suggested Filters switching (low signals) using FSA3157 - 73 de Gian I7SWX
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i7swx <i7swx@yahoo.com>12441 2016-02-24 05:55:41 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /FSA3157-Filters-switchingV2.JPG
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Description : Suggested Filters switching (low signals) using FSA3157- Updated schematic - 73 de Gian I7SWX
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i7swx <i7swx@yahoo.com>12445 2016-02-25 08:48:51 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE4250-BPFilters-switching.JPG
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Description : This is the filters switching suggested using the PE4250 in place of the FSA3157 as presented on a previous schematic. 73 Gian, I7SWX
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i7swx <i7swx@yahoo.com>12449 2016-02-26 09:49:14 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /PE1KTH experiments/PE4239 Filters switching.pdf
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Description : This is a suggested Filters switching using the PE4239. Schematic is replacing the previous published PE4250, not recommanded due to spuries internally generated on low bands. A derating curve below 10MHz is also reported. 73 Gian I7SWX
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i7swx <i7swx@yahoo.com>12503 2016-03-14 17:01:28 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /K1RF/quad 12 MHz roofing filter with diplexer 1-30 MHz ret loss.png
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Description : return loss plot 1-30 MHz 12 MHz quadrature coupled roofing filter with bridged T diploexer
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k1rf_digital_steve <sbdick@optonline.net>12562 2016-03-31 20:54:59 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : copyrighted for education use only
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km6sn <rod.km6sn@wildblue.net>12575 2016-04-01 15:48:47 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /Stable LC Oscillators.pdf
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Description : Cleaned version of the files uploaded by KM6SN on stable LC oscillators. -- for educational use only! --
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trc_wm <niels@b-lex.nl>12600 2016-04-05 04:29:30 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /EMRFD Vackar 4_7.pdf
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Description : Low Noise Vackar project
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jwharding3 <jwharding3@yahoo.com>12665 2016-04-18 19:12:43 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /villard-cage.jpg
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Description : Villard cage vhf direction finding apparatus. A shielded dipole with the receiver mounted INSIDE the shield. Provides extremely deep nulls off the end, perfect for locating the source of a signal. Note the dipole inside the cage is suspended at the ends with fishing-line insulators. The dipole does not have to be resonant- it will work fairly well across a wide (100 MHz?) bandwidth. The device shown was used to accurately locate a bad insulator on a power pole that was generating tons of RF at HF. A VHF harmonic of such noise is much easier to pinpoint. The Villard cage ("Cage" herein) offers such a sharp and deep null off the ends that it is possible to identify which crossarm on the pole has the problem; it is even possible to identify which side of the crossarm has the problem. The Cage is constructed with bare copper wire stiff enough to be self-supporting. Four long wires are arranged in a square (when viewed down the axis of the dipole), and the ends of the cage wires are bent into a taper and soldered together. At some arbitrary positions along the length of the cage install a wire "Square" which matches the cross-section of the Cage, and solder the wire Square to the cage wires. The Square dimensions and placement are NOT critical, and is mostly for physical support, and partially for current balance. The Cage apparatus is ideal for accurately locating the source of any VHF signal. I used a cheap Radio Shack Aircraft AM receiver; any receiver will do. The important part is EVERYTHING MUST BE PHYSICALLY WITHIN THE CAGE- NO WIRES MAY ENTER OR EXIT THE CAGE. The example shown in this picture has been malformed a bit from careless storage over the years. I suspect it
would work perfectly well just the way it is shown. A little more tension on the dipole would be nice to make it more straight. Have fun. KM6SN
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km6sn <rod.km6sn@wildblue.net>12666 2016-04-18 19:26:07 N0UU Re: AD9910 software? Can anyone give me a link to software (possibly Arduino) to control the
AD9910 from both the keyboard and a rotary encoder? Lots of sort of stuff
on the WEB, but I'm missing one to simply control the board (with an IF
offset). Thanks, N0UU12689 2016-04-21 03:08:36 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /hi-stab-osc1.zip
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Description : Complete and clean pdf copy of article on high stability LC oscillators, from RF Design "Oscillator Design Handbook" , copyright 1995. Two zip files were needed to circumvent 10mb upload limit. This is 1 of 2.
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km6sn <rod.km6sn@wildblue.net>12690 2016-04-21 03:09:51 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /hi-stab-osc2.zip
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Description : Second zip file of High Stability Oscillator
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km6sn <rod.km6sn@wildblue.net>12947 2016-06-09 16:00:55 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /S-1005-01 PSoC5 HF- BLOCKSCHEMATIC.GIF
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Description : Block schematic PSoC5 experimetal receiver
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jorschei <kthkit@xs4all.nl>12999 2016-07-05 17:31:48 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /N7EU/Heathkit2305kHzFilter.pages
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Description : Heath kit 2305 kHz 4 pole crystal filter schematic
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cwfingertalker <cwfingertalker@gmail.com>13013 2016-07-10 12:00:28 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /K5ESS/Inductor Calculation Table.jpg
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Description : Shorted Turns Measured vs calculated values
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nothdurftm <k5ess.nothdurft@verizon.net>13030 2016-07-18 03:46:34 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - RadCom 12-83.PDF
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kf8zn <kf8zn@yahoo.com>13031 2016-07-18 03:46:44 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - HB9BWY Sprat 102(1).PDF
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kf8zn <kf8zn@yahoo.com>13032 2016-07-18 03:47:01 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - Miho 1977.PDF
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kf8zn <kf8zn@yahoo.com>13033 2016-07-18 03:47:19 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - HB9BWY Sprat 102.PDF
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kf8zn <kf8zn@yahoo.com>13034 2016-07-18 03:47:55 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - elrad 1980.PDF
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kf8zn <kf8zn@yahoo.com>13035 2016-07-18 03:48:11 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - elektor 05-84.PDF
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kf8zn <kf8zn@yahoo.com>13036 2016-07-18 03:48:30 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - DK1HE.PDF
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kf8zn <kf8zn@yahoo.com>13037 2016-07-18 03:48:45 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - 80m_DF.PDF
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kf8zn <kf8zn@yahoo.com>13038 2016-07-18 04:56:42 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /6306.pdf
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kf8zn <kf8zn@yahoo.com>13039 2016-07-18 06:15:08 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /TCA 440 /TCA440 - Hael copyright.PDF
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kf8zn <kf8zn@yahoo.com>13040 2016-07-19 02:45:50 i7swx Re: New file uploaded to emrfd Hi Mike,
thank you very much for the several files about TCA440 you uploaded.
Best 73
Gian
I7SWX13041 2016-07-20 13:26:43 kf8zn Re: New file uploaded to emrfd Gian,
You are welcome!
I am hoping to find more SSB/DSB Circuits.
Mike: AC2Q13214 2016-10-22 09:00:35 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /QRP Order 3 BPF with bifilar-wound L1 and L3.pdf
Uploaded by : k1rf_digital_steve <sbdick@optonline.net>
Description : QRP order 3 Chebychev bandpass filter based on the two-part article in the May-June 1998 QST by Ed Wetherhold, W3NQN entitled "Clean up your signals with bandpass filters". This uses T50 toroids and 500V silvered mica caps. PCB is available from Oshpark at https://oshpark.com/shared_projects/RWNJIwoJ
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k1rf_digital_steve <sbdick@optonline.net>13225 2016-10-27 05:06:52 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /K1RF 40M bifilar input and output bandpass filter .asc
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Description : LT SPICE model of 40 meter order 3 Chebychev filter with bifilar-wound input and output inductors
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k1rf_digital_steve <sbdick@optonline.net>13279 2016-11-07 13:49:18 IEN Re: New file uploaded to emrfd HiHow many watts the filter can handle?73norberto.modanesi@gmail.com
San Nicolás----- Original Message -----13431 2017-01-01 18:16:52 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KI4IO/PC260003 (bottom compartment).jpg
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Description : Bottom compartment of 20 meter transceiver
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jwolczanski <jerrywolczanski@earthlink.net>13519 2017-02-02 03:15:53 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /YO6SSW/rf-signal-generator.png
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Description : RF signal generator block diagram
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yo6ssw <benishor@gmail.com>13530 2017-02-06 03:29:48 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /GWØOAJ/52 Mhz.jpg
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Description : 52 MHz showing a gash sprog plus also the 100 MHz
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jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm <jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm@yahoo.com>13531 2017-02-06 03:30:56 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm <jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm@yahoo.com>13532 2017-02-06 03:31:52 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm <jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm@yahoo.com>13533 2017-02-06 03:33:19 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm <jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm@yahoo.com>13534 2017-02-06 03:34:28 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm <jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm@yahoo.com>13536 2017-02-06 07:25:48 John Re: New file uploaded to emrfd 13541 2017-02-06 10:00:12 John Marshall Re: New file uploaded to emrfd John,
Nice "proof of concept" work on Adrian's proposal. It does look like a viable approach.
You noted "real problems with harmonics" at the bottom end of the output range. I wonder if that might be reduced by applying the square wave to the mixer's LO port and taking output from the IF port. The IF port should work better at low frequencies.
I assume you used the Q-BIT amp because of its reasonable input/output match rather than because gain was needed. Those amps have very good specs but I wonder if it contributed to the harmonic content of the output. Some more gain and an AGC loop to level the output and this looks pretty useful.
John, KU4AF
Pittsboro, NC
13542 2017-02-06 10:11:49 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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yo6ssw <benishor@gmail.com>13543 2017-02-06 10:11:55 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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yo6ssw <benishor@gmail.com>13544 2017-02-06 10:12:03 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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yo6ssw <benishor@gmail.com>13545 2017-02-06 10:12:08 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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yo6ssw <benishor@gmail.com>13546 2017-02-06 10:12:18 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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yo6ssw <benishor@gmail.com>13547 2017-02-06 10:31:08 Adrian Scripcă Re: New file uploaded to emrfd Hi John,Very nice results you got there! It looks pretty good, even better than I expected. As for the 100Mhz leak-through signal, what about we move both oscillators up 50Mhz? As in having the Si570 tune from 150.1Mhz to 250MHz and have the other fixed oscillator run at 150MHz? It should clear things up a bit I reckon. It would be interesting to make the changes and compare the results if you have the posibility.Thanks!Adrian, YO6SSW13548 2017-02-06 11:32:32 John Re: New file uploaded to emrfd 13549 2017-02-06 15:58:24 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /GWØOAJ/RF Signal Generator/W7ZOI 50 Ohm Feedback Amp.jpg
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jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm <jm54w5ubsnahhekz7byc5zl3v2ii5d6q2wxveutm@yahoo.com>13550 2017-02-06 21:16:01 John Re: New file uploaded to emrfd - Re: Sig Gen 13556 2017-02-07 10:44:42 Adrian Scripcă Re: New file uploaded to emrfd - Re: Sig Gen Awesome, John! I can almost see it coming together. Now we just need more gain which we might obtain say with a monolithic amp (and an AGC). I'm curious how much will the signal increase compared to the background noise. If that becomes a problem, I suppose we can further filter with a switchable bandpass filter.73!Adrian, YO6SSW13650 2017-03-03 09:33:15 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jorschei <kthkit@xs4all.nl>13651 2017-03-03 11:43:28 blumu Test VCXO schematics Effusive thanks for this upload, Jorschei.
This is the kind of stuff I like to play with!
MichaelUK
.............................
13652 2017-03-03 15:28:53 jorschei Re: Test VCXO schematics Michael,
Be aware thad crystal with smaller size has fewer shifts.
Crystals with the specified 30 pF capacitor found to be the best shift.
Modern SMD crystals specified for 12-15 pF has less shift I found.
A choke in series with the Crystal and capacitor shift the frequency a little above the specified frequency and the capacitor tuned them lower.
73” Joris
13675 2017-03-10 08:46:44 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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riccardo451 <ricky451@hotmail.it>13677 2017-03-10 09:44:42 Graham / KE9H Re: New file uploaded to emrfd What is going on here?When I try to download "SDR research paper.pdf"I get redirected to a site named "https://xa.yimg.com" and my security software goes nuts.Is this a legitimate yahoo "image" site, or is this a security hijack?None of the other files in EMRFD do this.--- Graham / KE9H==13680 2017-03-10 09:56:51 Andy Re: New file uploaded to emrfd I get redirected to a site named "https://xa.yimg.com" and my security software goes nuts.Is this a legitimate yahoo "image" site, or is this a security hijack?It is legitimate. Yahoo owns that domain. Yahoo!Groups always use it to "serve" files to us from their servers.When you click on any file from any Yahoo!Group, Yahoo's servers give it to you using a temporary (very long) URL that always begins with xa.yimg.com. They've been doing this for at least the last several years.Andy13681 2017-03-10 10:16:35 K5ESS Re: New file uploaded to emrfd That is the site the paper is located on. I get no security warnings. Running Win 10, Norton antivirus and Firefox browser.
Mike N.
K5ESS
13683 2017-03-10 10:25:22 Riccardo Montagut... Re: New file uploaded to emrfd I really don't know, I've downloaded it using my university access so the file has to be virus free... I can try to reupload it
73 Riccardo
Inviato da iPhone
Il giorno 10/mar/2017, alle ore 18:44, 'Graham / KE9H' ke9h.graham@gmail.com [emrfd] <emrfd@yahoogroups.com> ha scritto:
What is going on here?
When I try to download "SDR research paper.pdf"
I get redirected to a site named "https://xa.yimg.com" and my security software goes nuts.
Is this a legitimate yahoo "image" site, or is this a security hijack?
None of the other files in EMRFD do this.
--- Graham / KE9H
==
13684 2017-03-10 10:25:38 Riccardo Montagut... Re: New file uploaded to emrfd I've just tryed to download the file and I can download it normally under mac osx. The website that you see when you try to download its the doenload link from the server i suppose
73 Riccardo
Inviato da iPhone
Il giorno 10/mar/2017, alle ore 18:44, 'Graham / KE9H' ke9h.graham@gmail.com [emrfd] <emrfd@yahoogroups.com> ha scritto:
What is going on here?
When I try to download "SDR research paper.pdf"
I get redirected to a site named "https://xa.yimg.com" and my security software goes nuts.
Is this a legitimate yahoo "image" site, or is this a security hijack?
None of the other files in EMRFD do this.
--- Graham / KE9H
==
13686 2017-03-10 11:30:35 Andy Re: New file uploaded to emrfd FYI, the paper I just downloaded from Yahoo's [emrfd] website is identical to my download yesterday from IEEE. So nothing nefarious got attached to the file by Yahoo or someone else.I think your security software just got a little too paranoid about the URL. These days it's hard to keep up, playing the leapfrog game.Yahoo!Groups are fairly popular, so there's a good chance your security software may eliminate those warnings before too long, once they realize it's normal and OK.Andy13690 2017-03-10 15:44:13 Graham / KE9H Re: New file uploaded to emrfd Yes. Thank you. I downloaded and it looks fine.My browser security did not like the re-direction, and I did not recognize the xa.yimg.com site.Thanks for retrieving the paper and posting it.--- Graham / KE9H==13772 2017-04-05 20:59:51 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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nothdurftm <k5ess.nothdurft@verizon.net>13797 2017-04-13 13:42:57 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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k1rf_digital_steve <sbdick@optonline.net>14104 2017-06-29 04:06:52 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : Example of bandwidth reduction (hf) on TDA2003 as used in the FT920 to reduce audio noise also. See Rx and Cx values
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i7swx <i7swx@yahoo.com>14129 2017-07-02 13:40:55 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : Balanced antenna coupler built by Ashhar Farhan - this is a description of my version of the coupler. Very interesting design!
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jwolczanski <jerrywolczanski@earthlink.net>14272 2017-09-06 16:50:32 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KI4IO/170906_05 (good recording - busy band).WAV
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Description : Uploaded a recording of my Binaural receiver on 40 meters early this evening. In the KI4IO folder. This radio is remarkable!
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jwolczanski <jerrywolczanski@earthlink.net>14274 2017-09-07 12:48:49 Nick Tsakonas Re: New file uploaded to emrfd Hi Jerry,your recordings are indeed a music in my ears!This is a receiver I wanted to build for long time now and it is the first time I hear how it sounds. I had a different expectation but not very far from that!if it is not too much of a trouble , and you don't mind if I exploit a bit your excitement of making recordings, I would like to ask if possible for a recording in a normally busy band with more than one signals (but not contest crowded) but without tuning at all during the recording. If you could tune to a frequency where there are a few stations around and leave it there for 1 minute, I would like to hear how the signals spread around when you are not tuning and how easy is to make my brain "lock" in any one of them.This is something I always wanted to experience and one of the many reasons I would like to have a receiver like that!I would greatly appreciate if you could provide a recording like that!Great job, thanks for sharing this with us!73,Nick, SV1DJG14281 2017-09-07 21:29:33 K5ESS Re: New file uploaded to emrfd Been planning to build one of these for a while. What I would like to hear is a recording of the 20m FT8 or JT65 frequencies. I bet it is surreal.
Mike
K5ESS
14284 2017-09-08 19:07:31 jwolczanski Re: New file uploaded to emrfd Nick, I'll do exactly as you ask. Just got back from a little over-night sailboat trip - will make a recording ASAP
Jerry
KI4IO14286 2017-09-09 05:12:37 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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Description : Photo of my Binaural receiver lashed up on the bench. I thought I'd play with it for a few weeks before thinking about a proper enclosure.
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jwolczanski <jerrywolczanski@earthlink.net>14288 2017-09-09 15:36:00 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KI4IO/170909_00(Binaural recording FOC QSO party).WAV
Uploaded by : jwolczanski <jerrywolczanski@earthlink.net>
Description : Here's another recording using my binaural receiver - this time it was tuned to just one frequency during a "FOC" operating event (CQ BW).
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jwolczanski <jerrywolczanski@earthlink.net>14289 2017-09-09 15:41:29 jwolczanski Re: New file uploaded to emrfd OK Nick - there was a "contest" of sorts (an FOC operating event), which had a lot of signals. I parked the radio on one frequency so you could hear a lot of signals. What sticks out to me is the ability to copy weak CW signals in the presence of loud signals. No AGC plus a lot of dynamic range in the audio channel sure helps.
Recording is: 170909_00(Binaural recording FOC QSO party).WAV
I'll try to make another recording with signals a little more spread out. These FOC guys were really bunched up.
Jerry
KI4IO
Warrenton, VA14290 2017-09-09 16:36:27 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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File : /KI4IO/170909_01 (Binaural recording SKCC Weekend Sprint).WAV
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Description : One more recording with the binaural radio - a smattering of activity from the SKCC week end sprint
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jwolczanski <jerrywolczanski@earthlink.net>14291 2017-09-10 02:04:32 Nick Tsakonas Re: New file uploaded to emrfd Hi Jerry,thanks for the recording! this is exactly what I was expecting from a binaural receiver!It is amazing how the signals are positioned and how you can focus on each one of them! It is true that copying a weaker signal when a stringer one appears "nearby" is much easier!I think that the previous recordings (with the tuning) were masking this fantastic effect!I guess that a similar effect is present on SSB although the signals may be overlapping due to their bandwidth!There is a mind-blowing recording by LZ1AQ from his diversity reception experimentshttp://lz1aq.signacor.com/docs/dr/ssb/2015-04-04%201740.mp3in which -besides the signals moving around- they are also spread and almost separated!I am wondering how close to that will be your receiver on SSB!Thanks for sharing this with us73,Nick,SV1DJGPS:you can find more LZ1AQ diversity experiments here:14403 2017-10-23 06:49:21 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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bwbangerter <bwbangerter@yahoo.com>14404 2017-10-23 06:50:12 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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bwbangerter <bwbangerter@yahoo.com>14405 2017-10-23 06:50:51 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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bwbangerter <bwbangerter@yahoo.com>14406 2017-10-23 06:59:35 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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bwbangerter <bwbangerter@yahoo.com>14415 2017-10-26 13:07:33 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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ab7vf <ab7vf@yahoo.com>14416 2017-10-26 13:11:27 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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ab7vf <ab7vf@yahoo.com>14417 2017-10-26 17:36:41 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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ab7vf <ab7vf@yahoo.com>14466 2017-12-26 09:46:10 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jwolczanski <jerrywolczanski@earthlink.net>14708 2018-05-02 16:55:09 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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bellettau <vk3pe@bigpond.com>14709 2018-05-02 16:55:37 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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bellettau <vk3pe@bigpond.com>14710 2018-05-02 16:57:14 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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bellettau <vk3pe@bigpond.com>14733 2018-05-03 08:27:08 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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kb1gmx <kb1gmx@arrl.net>14785 2018-05-14 19:05:34 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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kb1gmx <kb1gmx@arrl.net>14823 2018-05-20 01:37:43 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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vu3wjm <vu3wjm@yahoo.com>14824 2018-05-20 01:38:11 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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vu3wjm <vu3wjm@yahoo.com>14825 2018-05-20 01:42:50 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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vu3wjm <vu3wjm@yahoo.com>14839 2018-05-22 14:56:51 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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k6jq <k6jq@comcast.net>14913 2018-07-03 18:02:50 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jwolczanski <jerrywolczanski@earthlink.net>15255 2019-03-12 14:54:00 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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ab7vf <ab7vf@yahoo.com>15256 2019-03-12 14:55:34 ab7vf Re: New file uploaded to emrfd what a convoluted thing ...anyway band-pass filter for lm386 ...might be usefulJim15309 2019-05-28 06:00:09 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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neiperalta <norberto.modanesi@gmail.com>15341 2019-06-08 22:17:37 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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n7gtb <n7gtb@yahoo.com>15349 2019-06-11 06:34:54 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jim_amos_n8cah <jimamos@sbcglobal.net>15350 2019-06-11 06:35:12 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jim_amos_n8cah <jimamos@sbcglobal.net>15352 2019-06-11 07:25:31 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jim_amos_n8cah <jimamos@sbcglobal.net>15353 2019-06-11 07:25:36 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jim_amos_n8cah <jimamos@sbcglobal.net>15354 2019-06-11 07:29:53 emrfd@yahoogroups... New file uploaded to emrfd Hello,
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jim_amos_n8cah <jimamos@sbcglobal.net>15359 2019-08-05 08:58:23 Rod AppCad Hi All,
A wonderful old design tool is still available: AppCad
You can download it here:
Regards,
Rod