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  #1  
Old 08-08-2017, 02:33 PM
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RCA CTC-5 Westcott help

A month ago I got this RCA CTC-5 Westcott and recapped it. I get great sound and video, but even after making convergeance adjustments, I cannot get very good overall color. Adjusting the color killer, color and hue controls does almost nothing. When I degauss it with a degaussing coil, I see all kinds of bright colors as I move it around the screen. What is going on here?
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Old 08-08-2017, 02:35 PM
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Here is the picture of the set!
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Old 08-08-2017, 02:52 PM
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Looks like a problem with the flesh tones. Does it only really occur on people?
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Old 08-08-2017, 03:23 PM
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What does it look like with SMPTE bars and the color control set to produce fairly mild (low saturation) colors?
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Old 08-08-2017, 04:52 PM
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Center convergence is way off.
Do this to rough it in.
Dark room, color all the way DOWN. Brite & contrast about 2/3.
Dot pattern, Adjust the 3 conv magnets & 1 blue lateral ( not the rings)
to bring the dots together in the center ONLY.
The edges will fall into place much better then.
After you do this a few times & it "clicks" you wont need a generator,
you can do it by eye quicker.

The set probably needs a by the book set-up but this will get you
to the point to trouble shoot any other problems.

73 Zeno
LFOD !
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Old 08-08-2017, 05:33 PM
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As Zeno said, the convergence is way off in the pic you posted. But, you said you adjusted it, so do you have a pic after adjustment?
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Old 08-08-2017, 05:36 PM
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Another note, something I found the hard way on my CTC-5. If you degauss it after adjusting the edge magnets, you will louse it up. You MUST follow the procedure from the beginning: retract the edge magnets fully, then degauss, then adjust yoke position and purity rings on the neck, then adjust edge magnets.
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Old 08-09-2017, 09:25 AM
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I read in the service manual about adjusting the edge magnets. I turn them and they just spin. How do you back them out like the manual says?
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Old 08-09-2017, 11:32 AM
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The edge magnets are mounted on a screw thread, so if you keep turning counterclockwise, they will eventually retract fully and hit a stop.
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Old 08-09-2017, 12:18 PM
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IIRC, the threads are seated against a spring... you can pull back the magnet by pulling out on the "knob". Likewise, you can push the magnets in to approximately the correct position and then turn the "knob" for fine adjustments.
At least that's the way it is on a CTC 4, I never had a 5.

jr
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Old 08-09-2017, 12:19 PM
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This is a picture of the crosshatch pattern coming from my BK1077.
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Old 08-09-2017, 12:35 PM
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This is also as good as I can get the color bars to come in.
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Old 08-09-2017, 12:40 PM
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If I turn the color control on and all the way up, I start to see more blues and greens, but still looks terrible.
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Old 08-09-2017, 12:57 PM
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Color sets back then involved a two step process, first you set the parameters of a B & W picture and then you add color. Purity adjustment would be the first step to getting proper registration and then set the convergence. Your photo looks like ac running thru the picture which means you probably have leaking filter capacitors coming of the rectifiers.
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Old 08-09-2017, 01:13 PM
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Quote:
Originally Posted by jr_tech View Post
IIRC, the threads are seated against a spring... you can pull back the magnet by pulling out on the "knob". Likewise, you can push the magnets in to approximately the correct position and then turn the "knob" for fine adjustments.
At least that's the way it is on a CTC 4, I never had a 5.

jr
I don't think there are springs on the CTC-5, at least not that I noticed. Also, only a screwdriver slot - no knob to pull.
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