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Total 8 documents matching your query.

1. [Amps] vacuum relay failure (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Mon, 22 Nov 2004 10:02:46 -0500; I modified my SB-220 about 5 years ago with vacuum relays on the input and output. It has had a lot of hard contest use since then without incident, but this weekend, after about a half hour, I notic; /archives//html/Amps/2004-11/msg00367.html (8,006 bytes)
2. Re: [Amps] vacuum relay failure (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 22 Nov 2004 07:34:00 -0800; On Nov 22, 2004, at 7:02 AM, Pete Smith wrote: I modified my SB-220 about 5 years ago with vacuum relays on the input and output. It has had a lot of hard contest use since then without incident, but; /archives//html/Amps/2004-11/msg00368.html (8,232 bytes)
3. Re: [Amps] vacuum relay failure (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Mon, 22 Nov 2004 11:17:29 -0500; I do not use this amplifier QSK, and have it set up with a speed-up circuit in any case. Normally, I run 20-30 Ms of PTT delay to protect the relays, but that's not really practical with hand keying.; /archives//html/Amps/2004-11/msg00370.html (9,906 bytes)
4. Re: [Amps] vacuum relay failure (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Mon, 22 Nov 2004 08:36:08 -0800; Pete Smith wrote: I have replacement relays on the way, but would like to tap the experience on the list -- does this sound like just contact failure, or might there be something else in play? Is it; /archives//html/Amps/2004-11/msg00371.html (8,076 bytes)
5. Re: [Amps] vacuum relay failure (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 22 Nov 2004 08:45:07 -0800; On Nov 22, 2004, at 8:17 AM, Pete Smith wrote: I do not use this amplifier QSK, Pete -- With modern transceivers, there is usually no timing difference between QSK-CW and SSB-VOX. and have it set up; /archives//html/Amps/2004-11/msg00372.html (10,247 bytes)
6. Re: [Amps] vacuum relay failure (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Mon, 22 Nov 2004 12:26:07 -0500; Interesting. Thanks, Vic. I know it was the output relay because the grid and plate meters on the amp were still swinging -- in fact, probably over-swinging because of the unloaded state. I had an ar; /archives//html/Amps/2004-11/msg00374.html (9,313 bytes)
7. Re: [Amps] vacuum relay failure (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Tue, 23 Nov 2004 19:54:39 -0500; (snip) Vacuum relays have ratings that are frequency sensitive. In my Alpha 77Sx clone, the input reed relay was unfortunately shattered by U.P.S. and so replacement time was at hand. Exploring othe; /archives//html/Amps/2004-11/msg00404.html (7,885 bytes)
8. [Amps] Vacuum Relay Failure (score: 1): Author: "N4IJ ." <dougn4ij@gmail.com>; Date: Fri, 6 Jan 2017 16:46:39 -0600; Recently put one of the W7RY QSK boards in a TL922A and used RJ1 relays for both input and output switching in the amplifier. I think I bought the relays at different times. Once I replaced a bad (Ch; /archives//html/Amps/2017-01/msg00222.html (8,058 bytes)

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