RCA CTC-11D Restoration

[IsthmusTV]

Hi all,

I'm starting a thread for the restoration of the RCA CTC-11D that I picked up last week. Thanks to Phil Nelson, I have the SAMS info for it. I pulled the chassis and gave it the once-over. For the most part, it's clean and unmolested (aside from missing six tubes).



When I went to check the condition of the thermistor, it fell right off its leads. I'm starting to think that these failing thermistors were a good thing because they got people to just push these sets aside decades ago.


I opened the HV compartment and found that the 6BK4 regulator tube had separated from its base. When I tried to remove it, it broke. I think it had already gone to air.


I removed the HV cage to investigate and there is evidence that the 6BK4 got seriously hot-- hot enough to melt the HV cup. Fortunately, the flyback looks OK.



Is the HV cup usable like this? Could I try to heat it up and bend it back? What would cause the regulator tube to get so seriously overheated?

This restoration will probably take a while because I have so many other irons in the fire right now.

-Clark