CGranski@aol.com wrote:
Have an Amp Supply LK500-ZB that has developed a problem on 160
meters. This amp uses a pair of 3-500's in grounded grid. Power
output on a Bird has dropped to ~400 watts max and it draws excessive
plate current with more than 50 watts of drive power. Performance on
all other bands is normal and the problem is present with a dummy
load or antenna. The ceramic caps switched in on 160 have all just
been replaced with no improvement. Input SWR is normal.
If you've replaced the capacitors you probably looked carefully at all
the bandswitch contacts...right? Is there a plate current dip when you
try to tune it?
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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