When I operated the OL-OK RTTY DX contest, I ran the KPA at 300 Watts
output. The fan would generally
go up three steps when I was running 'em, and the temperature got into the
60's. The fan was a little loud, but tolerable with earphones on. But
today, I had occasion to need the amp to complete a QSO with a DX station on 20.
I ran 150 Watts output and my transmissions were no more than 3 minutes
long. Yet, every time I was transmitting a minute or so, the fan would kick
in, and it stepped up three or four times by the time I was finsished. Now
THAT was loud! Plus, the top rear of the amp was quite warm. Exhaust from
the fan was warm, too!
I didn't have the presence of mind to check the temperature today.
Any ideas? Has anybody else had this experience?
Bert, N4CW
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