[Drake] TR4C carrier problem

[Dick KF4NS]

Hi Guys,
I just had my first lengthy QSO on 20M SSB since the restoration. A 
problem has popped up that was not an apparent trouble while doing all 
the testing on the bench.

After about a full minute of transmission the wattmeter starts showing 
a gradual climbing of carrier on the SSB signal. I have very good air 
flow, carrier balance was set during rehab, the finals were 
neutralized. Power output is over 200W with plate current reading 
around 500ma.

This does sound like a heat problem but as I said, there is plenty of 
air flow in and out of the rig. I have not tried lowering the output 
yet to see what that does but just wanted to put this to the groups 
ASAP before I do any damage. I know that one of the filters is bad but 
the 9mhz OSC. was tweaked with C130 to a satisfactory balance which 
left the CXR OSC still very close to 9MHZ. Let me know your thoughts.

73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow!