Well, after a very busy end of last year + beginning of this year, I finally found some time to get back to the CTC11. I changed the 1M grid resistor and found no improvement.
So as much as I don't like this method, I decided to try a shotgun approach. Changed all of the capacitors and many resistors in the chroma section hoping to find the problem with the red. (see picture attached)
Still no reds, voltages still slowly varying and reading to high.
I have no clue what to try next...
Just tried swapping the 6GC7's around again. Two of them are brand new and the other tests as new. No change. Only difference now is that I never see any red in the picture at all.
My set is teasing me... I have a beautiful picture except there is no red. I'm stumped... Ready to consider shipping the chassis to an expert for repair. Does anyone know of a good vintage color television technician who can repair a CTC11 chassis? Or, I am open to any suggestions. Thanks John and others who have helped so far.
Wes