[BC] CCA FM20,000GZ

[Mark Earle]

On 12/10/2011 8:57 AM, Jim Offerdahl wrote:
> I am servicing a CCA FM20,000GZ that seems to go through the IPA tubes
> rather quickly. This current one is only about 8 months old and is
> starting to fail. The transmitter is tuned properly according to the
> meters. Anyone with real experience with this box have any pointers?
>
As others have echoed, check filament voltage with an RMS meter at the 
tube socket, then calibrate your front panel meter to that.

2nd thing, with it otherwise operating normaally, see if you can back 
down the exciter output until overall power just starts to fall off; 
then back up a smidge. This is usually 18-20 watts.

-- 
mwe
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