I'd forgotten about that trait-I have a pile of CTC-53's but only one inside and cleaned up. It holds my record, by a quite a bit, for longest warmup. I think I timed it at over 60 seconds to get a raster. I do find the picture they make to a have a pleasant quality. Biggest problem with my "good one" is something heat sensitive in the vert circuit that causes a lot of drift until it's good and warmed up. I've replaced the tubes and caps, not sure if I started replacing resistors or not. That set hasn't been turned on in probably 3 years
