Oscillator off in RCA CTC-11?

[TV Engineer]

Did you try replacing the mixer-osc tube in the tuner? If so, try several for one that performs best.

Also, if memory serves correctly, there is a "master" osc coil on top of the tuner. Tweak it ever so slightly after ensuring that you have a good tube in the tuner.

While it is normal for IF and tuner alignment to drift in an old set, the change is usually slight and not very noticable. If your alignment is far off, it usually due to a failure in the chassis or inexperienced hands trying to improve things.

Good luck!

[Phil Nelson]

I can swap the mixer/osc tube from my other CTC-11. Not sure if I have any more of that type.

The diagram shows the mixer plate coil accessible from the top . . . .

Speaking of hands, by coincidence I recently got an email from the previous owner, who ran across my article that mentions solving an audio problem. This is two or three years after I last heard from him. He remarked, "Oh, I forgot to tell you, I had to wedge a matchbook under the base of the 6EW6 tube to get any sound."

Phil