I'm not sure how to respond to my first thread. Sorry if
this is a duplicate. I have been trying to find the cause
of my amplifier's output power falling off. Last night I
checked it by transmitting a 400 watt CW signal into dummy
load. After 1 minute output dropped by about 50 watts. At
higher wattages the loss is more pronounced, at 600 watts it
may drop to 400 over a minute time. Now when I apply drive
the filament voltage INCREASES. It always used to decrease
under load. That might be a clue, I don't know.
Thanks for all the help on this.>>
Jordon,
Maybe I'm missing something. I don't see anywhere what type
of amplifier you have.
Without knowing the type and a little more about it, any
answer could only be a very wild guess.
73 Tom
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