This TV languished for a long time while my shop was torn up for remodeling, but now I'm running out of excuses and should get back to it. Perhaps I'll start with purity and work through the color setup procedures. After I gave it a 21FJP22A transplant, I left the purity magnets cranked all the way out, and the purity is about as bad as it can get.
Which reminds me: I got a copy of the big 91-page CTC-4 RCA service clinic manual from the ETF and scanned it. I figure ETF will put it in their schematic archive, but you can also download it from this URL:
http://antiqueradio.org/art/RCA%20CT...e%20Manual.pdf
The manual has schematics for early & late production, plus lots of other goodies.
Regards,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html