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I got my first roundie, a CTC-10C, in 1974. So, it was 14 years old. CRT was broken, and a few tubes missing. I also got a CTC-11 chassis from the same guy. Also, missing a few tubes.
Installed a used CRT, an FBP, and tubes, and it came to life. It ran good, not great. In 1984, I installed a brand new FBP CRT. I had no idea that there was a difference in the FBP and the CYP that it came with. I used the set daily for almost 10 years.
In 1995, I replaced several OEM tubes, and some of the electrolytics, and it plays on.
I imagine that it is too late to find a 21CYP22 tube for this set, so it runs OK with the FBP and no modifications.
I dont run it much anymore, but, I do run it now and then. It's connected to the satellite, and the picture is still good with good linearity and color. The tuner needs some attention, so when I pull the chassis, I'll check it over.
It's the only CTC-10 that I have ever worked on. It seems to be built better than the later stuff like the 12's and on up.
I've worked on one Zenith roundie. It had something going on that would kill the damper after a few hours of playing. I was just beginning to work on tube stuff at the time, and it baffled me. I had it sitting in the showroom in my shop for years.
I know people that had roundies back in the day, and it was a normal occurrence to see the TV repair shop truck in their driveway. That said, I have an aunt that had a RCA CTC-16X that ran from 1964 to 1978 and never had the back removed for any reason. She replaced it because the colors weren't perfect anymore, and she wanted a new Magnavox in a pretty cabinet. She had the Maggie serviced alot, that I remember.
Those were the days.
Bruce
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