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Total 6 documents matching your query.

1. [AMPS] 8877 3 min time delay (score: 1): Author: ny1e@server.nlbbs.com (Dick McDuffie); Date: Tue, 19 Oct 1999 21:25:18 -0400; --==_940397118==_ Content-Type: text/plain; charset="us-ascii" I want to run multiple 8877 amps on a single HV supply, I can't figure a way to keep the 3 minute delay if I turned on a second amp. Is; /archives//html/Amps/1999-10/msg00551.html (7,940 bytes)
2. [AMPS] 8877 3 min time delay (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 19 Oct 1999 20:40:32 -0500; The only restriction is that the PTT line cannot be keyed for 3 minutes after you light the filament. You need a timer for each amps PTT line. HV being present at all times is not a problem. (((73))); /archives//html/Amps/1999-10/msg00552.html (8,047 bytes)
3. [AMPS] 8877 3 min time delay (score: 1): Author: K8rs@acd.net (Roger Stimson); Date: Wed, 20 Oct 1999 02:04:20 -0400; Dick, I use a common HV supply for my 6M and 2M amps that use 8877s. However, I have the heater voltages on each tube set up with 3 minute time delay so I can never make the mistake of applying the H; /archives//html/Amps/1999-10/msg00553.html (8,213 bytes)
4. [AMPS] 8877 3 min time delay (score: 1): Author: measures@vcnet.com (measures); Date: Wed, 20 Oct 1999 04:16:01 -0700; Oxide-cathode damage is caused by allowing cathode current to flow before the cathode reaches operating temp. If you have cutoff bias applied, no current can possibly flow. later, Dick - Rich..., 80; /archives//html/Amps/1999-10/msg00557.html (7,635 bytes)
5. [AMPS] 8877 3 min time delay (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 20 Oct 1999 09:50:45 -0500; Dick, You went to a lot of trouble and expense. The HV can be there all the time. You just need to prevent the PTT relay from closing for 3 min. after the filament lights. All Alpha amps that use 887; /archives//html/Amps/1999-10/msg00562.html (8,076 bytes)
6. [AMPS] 8877 3 min time delay (score: 1): Author: ny1e@server.nlbbs.com (Dick McDuffie); Date: Thu, 21 Oct 1999 14:30:23 -0400; --==_940545023==_ Content-Type: text/plain; charset="us-ascii" I found a simple way to protect each amp, W.W. Grainger has a solid state delay relay made for refrigeration, adjustable from .1 to 600; /archives//html/Amps/1999-10/msg00581.html (8,443 bytes)

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