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1. [Amps] Ten Tec 425 Repair (score: 1): Author: Ken Claerbout <k4zw@verizon.net>; Date: Wed, 31 Aug 2016 09:46:22 -0500 (CDT); A friend asked me to look at his 425. First thing I noticed was the plate choke was burned. I think it came from trying to operate on 12 meters. I replaced that choke with the Ameritron model, which; /archives//html/Amps/2016-08/msg00078.html (8,538 bytes)
2. Re: [Amps] Ten Tec 425 Repair (score: 1): Author: Joe Giacobello via Amps <amps@contesting.com>; Date: Wed, 31 Aug 2016 14:56:36 -0400; Ken, I can't comment re L4, but high grid current is often associated with a failure of R17 (4.7 ohm , 5% resistor) on the bias board. Why this would only manifest on 75/80M is a mystery, but since i; /archives//html/Amps/2016-08/msg00083.html (9,524 bytes)
3. Re: [Amps] Ten Tec 425 Repair (score: 1): Author: Louis Parascondola via Amps <amps@contesting.com>; Date: Wed, 31 Aug 2016 16:55:26 -0400; I would tend not to think that R17 is the problem. If L4 is common to 160 and 80/75 I would think that you would see a similar problem on 160m. Most likely the full windings on L4 are in use on 160,; /archives//html/Amps/2016-09/msg00001.html (11,314 bytes)
4. Re: [Amps] Ten Tec 425 Repair (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 31 Aug 2016 16:14:25 -0700; Good advice. And if that's bad, other stuff on the bias and key logic boards may be bad. It's worth pulling those boards out and checking all the semiconductors with an analog VOM (like a 260). Yes,; /archives//html/Amps/2016-09/msg00002.html (11,828 bytes)

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