My T-4XC has changed behavior in Tune mode. It was that as I
turned up the gain the plate current and output would increase gradually. Now
there is no increase until the 12:00 position, where it is almost full power.
Then I have to turn in down to decrease power. SSB and CW modes seem to work as
before. I can get full power, it is just a little harder to tune up because I
have to turn the gain way up and then down. At first it led me to think I had a
final PA problem, so I did try swapping the 6JB6s. Also swapped the driver and
V1. Then I put it back as before. I fear that this is a preview of a total
failure (which would be easier to find).
73 and Happy New Year,
Bob WW3QB
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