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1. [Amps] TL-922 current/output etc (score: 1)
Author: Alex K2BB <alex.k2bb@gmail.com>
Date: Sat, 7 Jul 2007 13:18:54 -0400
Hi, I just got a TL-922 as a birthday gift from myself :) I am wondering what is the usual output at 120/240V, how much power it needs from the radio, what plate and grid current i should not exceed?
/archives//html/Amps/2007-07/msg00073.html (7,528 bytes)

2. Re: [Amps] TL-922 current/output etc (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Sun, 8 Jul 2007 21:40:21 -0400
Thanks guys. One more question - what do I do with ALC on TL-922? Do I need to connect it to 1000mp or it is compatible with TS radios only? 2007/7/7, jeremy-ca <km1h@jeremy.mv.com>: ________________
/archives//html/Amps/2007-07/msg00098.html (9,600 bytes)

3. [Amps] rotary switch - shorting/non-shorting (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Tue, 28 Aug 2007 05:43:46 -0400
Hi, I just fried a rotary switch in my little MFJ-901B L-Tuner. The switch in that tuner is shorting the "lower portion" of inductor to the ground. Usual situation from manual - "bla-bla-bla, never s
/archives//html/Amps/2007-08/msg00223.html (6,750 bytes)

4. Re: [Amps] rotary switch - shorting/non-shorting (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Thu, 30 Aug 2007 14:24:28 -0400
you know, guys, I was kinda surprised that I was able to fry the switch in 200W-rated tuner using only 100W RF. Geez, I did it in 5 nimutes :) Speaking of replacement - I found Lorlin CK1458 at mouse
/archives//html/Amps/2007-08/msg00262.html (9,704 bytes)

5. Re: [Amps] rotary switch - shorting/non-shorting (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Thu, 30 Aug 2007 14:50:49 -0400
12 positions needed. I thought I would just ground unused lower portion of inductor in T-turer. Am I missing something? 2007/8/30, Tom Rauch <w8ji@contesting.com>: ___________________________________
/archives//html/Amps/2007-08/msg00264.html (9,085 bytes)

6. [Amps] switching power supply for tube amplifier (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Fri, 14 Sep 2007 13:34:24 -0400
Hi, After reading discussions of "light and powerful PA for expeditions" at Russian website (cqham.ru) I got this crazy idea of using switching power supply in it. What options we usually have - it i
/archives//html/Amps/2007-09/msg00148.html (7,978 bytes)

7. Re: [Amps] switching power supply for tube amplifier (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Fri, 14 Sep 2007 15:05:49 -0400
I don't believe in transistors, they are so easy to fry. having tube you see that it gets orange, you say oops, turn the amp off, fix the problem (or even replace some $20-50 tube) and continue... in
/archives//html/Amps/2007-09/msg00152.html (9,001 bytes)

8. Re: [Amps] switching power supply for tube amplifier (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Fri, 14 Sep 2007 15:56:09 -0400
NX7U (Scott Townley) told me to check http://www.wattsunlimited.com. 10 pounds, 2KW - It looks promising. I am just wondering, how come no manufacturers use them? 2007/9/14, Alex Malyava <alex.k2bb@g
/archives//html/Amps/2007-09/msg00154.html (9,347 bytes)

9. Re: [Amps] Anyone build a GU5B? (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Fri, 5 Oct 2007 14:24:54 -0400
There was an interesting article on cqham.ru website by EX8A describing contesting amplifier. Output - 3000W++ on HF with 24/7 duty cycle... Key points are: 2 GU-81 in parallel, 2 pi-networks help to
/archives//html/Amps/2007-10/msg00059.html (12,309 bytes)

10. [Amps] TL-922 500W only (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Fri, 22 Feb 2008 10:55:58 -0500
Hi guys, I think I have a problem with my TL-922 amp. It gives only 500W out with approximately 50W in. Grid current, or whatever that meter measures (like voltage between cathode and ground) shows a
/archives//html/Amps/2008-02/msg00152.html (6,994 bytes)

11. Re: [Amps] SB-220 w/5 3-500 (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Fri, 22 Feb 2008 19:01:34 -0500
OMG, 3kW on CB band :) That reminds me a guy, who was using russian military transmitter R-140 into 7-ele yagi on CB band. _______________________________________________ Amps mailing list Amps@conte
/archives//html/Amps/2008-02/msg00157.html (9,504 bytes)

12. Re: [Amps] 3CX1500D7 quote (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Wed, 7 Jan 2009 23:32:28 -0500
Wow, I remember the times, back in dorm around 1995, when we - cheap Ukrainian students - were buying GU-50 tubes for 50-60 cents or so... the only tube we could afford :) I was also told that exchan
/archives//html/Amps/2009-01/msg00051.html (8,938 bytes)

13. Re: [Amps] GU81-M on highbands (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Sun, 11 Jan 2009 12:51:38 -0500
there is an EX8A schematic - pair of GU81M with double pi-networks - one of them instead of plate choke. that amp works up to 10m no problem and gives 3kW out. http://www.cqham.ru/HiFi_Contester_EX8A
/archives//html/Amps/2009-01/msg00083.html (8,605 bytes)

14. Re: [Amps] GU81-M on highbands (score: 1)
Author: "Alex Malyava" <alex.k2bb@gmail.com>
Date: Sun, 11 Jan 2009 18:53:23 -0500
I can briefly translate that article, if you interested in that schematic. that article covers several key points: 1. "old" GU81M tube is not outdated and still good for linear amplifiers 2. tube, de
/archives//html/Amps/2009-01/msg00091.html (11,526 bytes)

15. [Amps] Alpha 86 light bulb (#85) replacement (score: 1)
Author: Alex Malyava <alex.k2bb@gmail.com>
Date: Thu, 25 Feb 2010 13:59:02 -0500
Hi everybody, I need a lightbulb - manual says it is type #85 to fix Alpha 86 amplifier for Javier HR2J - I am going down there next week. I did some google search - it comes back with tonns of vario
/archives//html/Amps/2010-02/msg00744.html (7,047 bytes)

16. Re: [Amps] New Handy Amp (score: 1)
Author: Alex K2BB <alex.k2bb@gmail.com>
Date: Mon, 7 Jun 2010 10:18:27 -0400
I first thought, based on the model name, that it uses one 3-500Z, hi :) Sent from iPhone _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting
/archives//html/Amps/2010-06/msg00068.html (9,529 bytes)

17. Re: [Amps] 6146 via 572b's (score: 1)
Author: Alex Malyava <alex.k2bb@gmail.com>
Date: Tue, 12 Oct 2010 15:31:36 -0400
What about "cascode" schematics? I remember, back in dormitory times, making one for my homebrewed radio. It needed about 100mW to produce 80-100W output, depends on band. ___________________________
/archives//html/Amps/2010-10/msg00197.html (9,203 bytes)

18. [Amps] GI-46B in TL-922 (score: 1)
Author: Alex Malyava <alex.k2bb@gmail.com>
Date: Wed, 26 Jan 2011 11:38:29 -0500
Hello everybody, I have a TL-922 amplifier and one of 3-500 tubes died - it is widely open now. Another one is still good and amp produces 400-500W out. Friend of mine gave me a link to youtube video
/archives//html/Amps/2011-01/msg00312.html (7,311 bytes)

19. Re: [Amps] GI-46B in TL-922 (score: 1)
Author: Alex Malyava <alex.k2bb@gmail.com>
Date: Wed, 26 Jan 2011 13:04:56 -0500
looking at the video and pictures the only things I see done are: - grid capacitors/chokes removed - voltage stabilizer (?) added Here are closeups from Italian website: http://www.italyamplifier.com
/archives//html/Amps/2011-01/msg00319.html (10,759 bytes)

20. [Amps] MACHLETT tubes? (score: 1)
Author: Alex Malyava <alex.k2bb@gmail.com>
Date: Wed, 9 Feb 2011 12:19:24 -0500
There is am ebay listing for 'MACHLETT 3-500ZG', new, with warranty etc... - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160543625478 Who is MACHLETT at all, I never heard of them. The only so
/archives//html/Amps/2011-02/msg00062.html (6,830 bytes)

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