I think I see a couple of wax/paper capacitors in your set's HV box. Those should be replaced before other tests are done.

what the others said (use the old tubes, replace those paper cap in fly cage) AND check the fuses. also use the correct fuses if not already doing so.

Oh, what a frustrating and rewarding hobby we're in.

Well took a break from working on this set, before I did I got HV to come back although still have to measure how much HV it's putting out, unfortunately no raster but that may be due to the bad tube socket as I believe it's a video amp tube. Going to replace the wax caps in the HV cage before anything else, I believe I found someone with an extra tube socket that will work I just need to wait for it to get here before I start working on it again :)

Hmmm- interesting. I got into early color sets for the same reason people get into British cars- style, certainly not reliability. My first mentor made me SWEAR I'd never leave the room while a CTC7 or earlier was running even for a moment. My CTC4 draws an arc at the drop of a hat. It took me years to build up the courage to tackle it. One slight error in wire dressing- ZAP!

SO I suppose part of it is one's point of view. These sets should probably not have been sold until 1960 is mine. I have vivid memories of our Zenith's flyback in flames even in 1968. Perhaps that prejudiced me.

John H.

Zenith flyback failure (aside from the 1948-1951 portholes) is fairly rare let alone a flaming burnout.....It's like getting hit by lightning on a sunny day.