14930	2018-07-23 16:46:58	vk3hn	A 2N5109 for today
Message	Date	From	Subject
Sorry if this is a repost, I could not find prior art. 2N5109s are TO-39 NPN transistors with Ft > 1GHz, 0.4A collector current, widely used but 40 years old and hard to get. 2N3866, another old friend, is likewise. I know, they're on Mouser and Digikey, but a) long delivery times and high P&P costs to VK, and b) wouldn't it be nice to use a modern RF device, not Apollo-era devices? Can anyone suggest a modern (surface mount OK) equivalent that they have used in amateur band RF stages and can report good experience with? 73 Paul VK3HN.
14931	2018-07-23 17:07:13	Chris Trask	Re: A 2N5109 for today
I used the BFQ149 in my active antenna designs, but it seems to have gone out of production at NXP. There seems to be some residual stock available on the international scrounger market. > > 2N5109s are TO-39 NPN transistors with Ft > 1GHz, 0.4A collector current, >widely used but 40 years old and hard to get. 2N3866, another old friend, >is likewise. > > I know, they're on Mouser and Digikey, but a) long delivery times and >high P&P costs to VK, and b) wouldn't it be nice to use a modern RF device, >not Apollo-era devices? > > Can anyone suggest a modern (surface mount OK) equivalent that they have >used in amateur band RF stages and can report good experience with? > Chris When the going gets weird, the weird turn pro - Hunter S. Thompson
14932	2018-07-23 17:12:34	John E Bielefeld	Re: A 2N5109 for today
Try 2SC5347A $0.21 ea. NPN 12V 150mA fT=4.7ghz JohnB K1JEB
14933	2018-07-23 17:15:35	cqk1jeb	Re: A 2N5109 for today
Try 2SC5347A $0.21 ea. NPN 12V 150mA fT=4.7ghz JohnB K1JEB
14934	2018-07-23 17:24:45	Chris Trask	Re: A 2N5109 for today
Yes, that appears to be a good substitute for the BFQ149 as well. I'll have to get some and evaluate them. > >Try 2SC5347A $0.21 ea. NPN 12V 150mA fT=4.7ghz >JohnB >K1JEB > >> Sorry if this is a repost, I could not find prior art. >> >> 2N5109s are TO-39 NPN transistors with Ft > 1GHz, 0.4A collector >> current, widely used but 40 years old and hard to get. 2N3866, another >> old friend, is likewise. >> >> I know, they're on Mouser and Digikey, but a) long delivery times and >> high P&P costs to VK, and b) wouldn't it be nice to use a modern RF >> device, not Apollo-era devices? >> >> Can anyone suggest a modern (surface mount OK) equivalent that they >> have used in amateur band RF stages and can report good experience with? > Chris When the going gets weird, the weird turn pro - Hunter S. Thompson -----Original Message----- >
14935	2018-07-23 18:08:26	Ken Chase	Re: A 2N5109 for today
2N3866 is available and Kitsandparts.
14936	2018-07-23 18:09:46	Dana Myers	Re: A 2N5109 for today

14937	2018-07-24 03:16:49	Roelof Bakker	Re: A 2N5109 for today
Hello all, NXP has a nice range of RF transistors and these are carried by Mouser at very reasonable cost. I have used the BFG592 as 2N5109 replacement, however this device is now obsolete. It seems to have been replaced by the BFU590 and in practice I have not noted any difference. The 2N5109 is still available in Europe but at ridiculous increased cost. 73, Roelof, pa0rdt
14938	2018-07-24 04:07:22	Lasse Moell	Re: A 2N5109 for today
BFG592?? Cannot find this animal... but BFG591 looks a bit more familar :) 24 juli 2018 12:16:46 +02:00, skrev 'Roelof Bakker' roelof@ndb.demon.nl [emrfd] : Hello all, NXP has a nice range of RF transistors and these are carried by Mouser at very reasonable cost. I have used the BFG592 as 2N5109 replacement, however this device is now obsolete. It seems to have been replaced by the BFU590 and in practice I have not noted any difference. The 2N5109 is still available in Europe but at ridiculous increased cost. 73, Roelof, pa0rdt
14939	2018-07-24 06:53:36	i7swx	Re: A 2N5109 for today
Hi all, A few years ago, I have used BFG135 for HF amplifiers and were performing OK. 7GHz, 150mA, 1W, Hfe 130, G=16dB, d2 -58dB, emitter ballasting resistors, SOT223. I do not know if these are still a valid selection or there are more modern ones from NPX 73 Gian I7SWX
14940	2018-07-24 09:05:17	Roelof Bakker	Re: A 2N5109 for today
Hello Lasse, I stand corrected! BFG591 it is. I have used it in the output stage of active antennas and Norton amplifiers. 73, Roelof, pa0rdt
14941	2018-07-24 09:11:27	John Harding	Re: A 2N5109 for today
You might look at BFQ18, SOT89 package. It was used in the Clifton Labs Z10043A Norton Amplifier kit. Unfortunately Clifton Labs was acquired by DX Engineering (that's not unfortunate in itself), but kit is not longer offered. The manual for kit has much info on performance and detailed schematic. https://www.okdxf.eu/files/Z10043A%20Broadband%20Norton%20Amplifier.pdf Be well John
14942	2018-07-24 09:13:53	Jim Strohm	Re: A 2N5109 for today
I wonder how the 2SC5347A or its ON Semi variant would work if installed tonbstone-style as a through-hole component. Obviously the power rating would be lowered and its top usable frequency would be nowhere near the GHz range. But for 50 to 60 cents each in onesie-twosie quantities, it might be a viable substitute for the 2N5109 or 2N3866 (except power). I casually looked, but didn't find ON Semi's planned marketing lifetime for this part. Does anybody know? Anybody have a good contact inside ON's sales/marketing? 73 Jim N6OTQ
14943	2018-07-24 10:24:06	Clint	Re: A 2N5109 for today
Does anyone have any info on how to convert the referenced Clifton Labs Norton amplifier to a balanced input magnetic loop amplifier? 73 Clint W7KEC
14944	2018-07-24 10:36:24	Lasse Moell	Re: A 2N5109 for today
If you have a look at LZ1AQ's webpages, you will find plenty of information that should be useful. Of course not a step by step instruction, but some very neat ideas, and you should be able to come up with something. /Lasse SM5GLC 24 juli 2018 19:23:56 +02:00, skrev 'Clint' kiheiman@q.com [emrfd] : Does anyone have any info on how to convert the referenced Clifton Labs Norton amplifier to a balanced input magnetic loop amplifier? 73 Clint W7KEC
14945	2018-07-24 11:48:42	Bill Carver	Re: A 2N5109 for today + Clifton Labs Z10043A
In that regard, if anyone has/could make a PCB layout for the Z10043A I would happily have a batch made for us. It is a GREAT RX preamp. W7AAZ
14946	2018-07-24 11:53:32	Bill Carver	Re: A 2N5109 for today
If the loop wants a 50 ohm load I'd try an MCL 1:1 transformer: T-626-X65 (or T-626-X65+). Or it could be conected to provide a 12.5 ohm load. Good from less than 50 KHz up. W7AAZ
14947	2018-07-24 13:28:43	Jochen Feldhaar	Re: A 2N5109 for today
Hi all, I have literally hundreds of 2N3866 NOS and some 2N5109, if anyone is interested. I am located in Germany. BTW, I have a huge assortment of transistors, diodes and ICs here, some years ago I bought the assets of an hobby electronics shop that converted to PC servide and smartphones. Regards, Jochen DH6FAZ Am 24.07.2018 um 01:46 schrieb prt459@gmail.com [emrfd]: Sorry if this is a repost, I could not find prior art. 2N5109s are TO-39 NPN transistors with Ft > 1GHz, 0.4A collector current, widely used but 40 years old and hard to get. 2N3866, another old friend, is likewise. I know, they're on Mouser and Digikey, but a) long delivery times and high P&P costs to VK, and b) wouldn't it be nice to use a modern RF device, not Apollo-era devices? Can anyone suggest a modern (surface mount OK) equivalent that they have used in amateur band RF stages and can report good experience with? 73 Paul VK3HN.
14948	2018-07-24 13:53:43	Ashhar Farhan	Re: A 2N5109 for today
The bfg591 needs high collector current to develop higher gain. The bfr93w is a nice low power transistor. The BFG591 works really well when biased to 20ma. - f
14949	2018-07-24 18:16:03	Greg Simopoulos	Re: A 2N5109 for today
Hello Jochen, guessing you are popular today...! So how much do you ask for each type? Best Regards, Greg S. KC9ZEW Sent from Yahoo Mail on Android
14950	2018-07-25 06:05:20	Rahul Srivastava	Re: A 2N5109 for today + Clifton Labs Z10043A
Hi! Want to make one for myself too. Let me give it a try Rahul VU3WJM