[AMPS] 3cx1200

[Rich Measures]

>
>	
>
>
>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  


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm