On May 19, 2004, at 7:11 PM, 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.
Any ideas as to what may be wrong?
Toasted bandswitch C-padder contacts on the 160m position?
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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