>> HAM use by someone else. It runs a 3CX3000A7 tube in
>> grounded grid.
>> Recently the output power has begun falling off rapidly
>> whenever I apply constant drive such as during tune up.
>> The tube is new and the plate voltage remains steady as
>> always.Is there anything else that could be causing this?
>> It reminds me of a tube that has gone soft although I am
>> sure it's not the tube.
>> Any help is appreciated
>>
>
Last time I had this happen it was the antenna. I think something was
getting hot and changing the match. I am sure you are tuning it into a dummy
load, so it can't be that. However, it was possibly worth mentioning.
Mike
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