Today's Mystery Guest (RCA CTC-4)

[Username1]

Originally Posted by old_coot88

Phil,
I know it's a long shot (well, so were the suspicions about the v.det diode), but see if you can locate the mixer plate adjustment. It may be a slug or a trimmer. Just tweak it slightly in both directions while watching a normal color program. Can't hurt nothin'.

In fact when we used to get tuners back from the rebuilder, there was a reminder tag stating to optimize the mixer plate coil if necessary.

I agree with this as a first place to check..... If you have a tuner subber use it,
or since you have the ctc 11 sitting there with nothing to do...... Take off the
rca plug from the tuner into the if strip, parallel it to feed both sets.... That way
if running 2 IF loads diminishes the signal you will see it on the 11 also at the
same time..... And it keeps the agc intact for the tuner.....

Double check the long feed line by running it to the 11 first to be sure it is not
getting any loss or noise etc.....

Remember to check grounds..... No spark shows.....

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