I have a CTC-17 combo, different cab but same TT/radio/tv.
Makes a great pic, the only issue I had on mine IIRC was it needed a HOT. the color was flakey, turned out to be a corroded wire on the top of the pcb on the chroma board. check for this as I think its a common failure mode. Its just a jumper wire that runs on the top, think it feeds the color output tubes plate voltage.
http://www.videokarma.org/showthread...09#post2993409
I started getting into it at around post#27 if you care to check into it.