90% of the time it is a diode on the hv board that is near the edge. If
I were home, I could give you the exact one, but won't be home in
Florida for a week (Sept 3). I repair amps and have worked on that
problem on that exact amp many times, and only once was it the tube.
Hope that helps. 73, Bruce, W8HW
On 8/26/2018 4:30 PM, Herbert Schoenbohm wrote:
Today I turned on the Al-1500and immediately notice that the grid current
went all the way over to the right and the amp grid protection circuit kick
in. Even with only 5 watts of drive, the grid current is about 175 ma. I
also notice that I don't see any HV indication. I hope this is not a bad
8877 final tube. Any suggestion to confirm this would be appreciated.
Thanks,
Herb, KV4FZ
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|