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The roundie Silvertone set I had, but sold, had two different tint controls, as does my Motorola TS-915. Both of these sets are very cumbersome to adjust to get the tint set right, and it always seems a little off to me. I could adjust them to look good with one source, and then change the channel and it would look off a bit.
The single tint control on the RCA and Zenith sets seems a bit more evolved to me.
I dug out my RCA service info for 1969-1970, and was going through the CTC40 circuit last night. This looks like a really neat set - basically a drop in solid state replacement chassis for the CTC38. If anyone viewing this needs factory schematics for any of the 1969 RCA sets, I can scan some of the info.
How does 15GP22 red differ from 25XP22 red? I noticed on the 25XP22, that red isn't a deep red, but more of a bright red. It is slightly different from what a modern TV would produce, but not in an offensive way. This is noticable with things like the CNN logo, for example. It's actually my only complaint about the colour on the CTC38.
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