[Amps] Trouble with LK500-ZB

[Barrie Smith]

There are padding caps switched in on 160.  And worse, if the amp is stock,
they are disc ceramic.  Check there.

73, Barrie. W7ALW


----- Original Message ----- 
From: <CGranski at aol.com>
To: <amps at contesting.com>
Sent: Wednesday, May 19, 2004 8:11 PM
Subject: [Amps] Trouble with LK500-ZB


> 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?
>
>
>
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