>
>
>
>
>I was testing a Henry 3k Classic which had been sitting idle for a few years.
>Amp tuned up fine on 40metrs with the HV in the CW position. In the SSB
>position, after keying down just long enough to check the Bird meter, the
>built-in pwr switch/breaker would trip. Output was about 1200w for 75w
>drive. HV was reading 4400v no-load, 4100v key-down, with about 600ma on the
>plate current. After the breaker was reset, all was fine again in the CW
>position. When we tried the SSB position again, same thing - tripped pwr
>breaker switch.
>
>Are 3cx1200's known to go gassy from sitting idle for years at a time ?
>
? no
>Visually all looks ok inside. Test was into a dummy load. My only guess is
>that the tube is flashing over........
>
? to find out, u need a high-pot. tester.
>
- later, Eric
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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