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Total 7 documents matching your query.

1. [Amps] L7 problems (score: 1): Author: "Paul Kraemer" <elespe@lisco.com>; Date: Thu, 8 Dec 2016 20:52:20 -0600; Group I have an L7 that was sent to me for repair and I am getting nowhere with it. The problem is the grid meter has a small negative reading in standby even with NO tubes installed. If the antenna; /archives//html/Amps/2016-12/msg00205.html (7,448 bytes)
2. Re: [Amps] L7 problems (score: 1): Author: joeduerbusch <k0bx@arrl.net>; Date: Fri, 9 Dec 2016 05:16:31 +0000; Check the Grid resistor on the front panel behind the Grid meter. JoeK0BX -- Honor Roll Phone Honor Roll CW Honor Roll RTTY Honor Roll 20 Meters 5BDXCC Plus 30,17,12 5BWAS ___________________________; /archives//html/Amps/2016-12/msg00207.html (9,020 bytes)
3. [Amps] L7 problems (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 8 Dec 2016 22:05:27 -0800; Group I have an L7 that was sent to me for repair and I am getting nowhere with it. The problem is the grid meter has a small negative reading in standby even with NO tubes installed. If the antenna; /archives//html/Amps/2016-12/msg00210.html (10,832 bytes)
4. Re: [Amps] L7 problems (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Fri, 9 Dec 2016 05:48:14 -0600; Check the filament feed through caps. They are famous for being leaky to ground and shorting to ground. 73 Jim W7RY Group I have an L7 that was sent to me for repair and I am getting nowhere with it.; /archives//html/Amps/2016-12/msg00213.html (8,939 bytes)
5. Re: [Amps] L7 problems (score: 1): Author: "Paul Kraemer" <elespe@lisco.com>; Date: Fri, 9 Dec 2016 20:10:42 -0600; Jim Good to hear from you. I was hoping you would have comments. I had already made the change on the keying going to a 100K 5w and series string of 1N5408 in ct for bias. The relay shorts the resist; /archives//html/Amps/2016-12/msg00242.html (14,016 bytes)
6. Re: [Amps] L7 problems (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sat, 10 Dec 2016 10:36:56 +0800; Did you check the filament feedthroughs like the other Jim suggested? 73, Alek. VK6APK I had already made the change on the keying going to a 100K 5w and series string of 1N5408 in ct for bias. The r; /archives//html/Amps/2016-12/msg00243.html (14,923 bytes)
7. Re: [Amps] L7 problems (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sun, 11 Dec 2016 08:09:59 +0800; If its simple to disconnect all the wires on T1, then a megger will tell you if it is sick. Check between windings and frame, etc. Solid state ones are cheap as chips on ebay and hand wound ones are; /archives//html/Amps/2016-12/msg00255.html (16,166 bytes)

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