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  #1  
Old 08-23-2013, 09:46 PM
6GH8cowboy 6GH8cowboy is offline
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ctc 10 power tuner

A CTC-10E arrived today from the luckiest guy in town. A check for shorts, and a 'slow start' after temporarily jumping the mains thermistor has rewarded me with hiss in the sound and a raster of sorts with no snow.
It has touch bar tuning and being there is no fine tuning knob, how do we get it to NOT skip chan-3. There seems to be some adjustments (fine tuning?) for each channel that will need a long thin screwdriver. Do these get adjusted in, out, or never.
Ive not pulled the chassis all the way out yet but I wanted to run a pattern thru it. At this moment I dont want to mechanicaly adjust anything without my inspection or yall's advice.
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Old 08-24-2013, 01:11 PM
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Adam Adam is offline
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Here's a page from an RCA factory manual which shows how it works. Basically you turn those screws for the channels you want all the way clockwise, ones you don't counterclockwise. And it does have the fine tuning, push in the small knob over the push-bar and turn it, and it adjusts it separately for each channel. A different gear corresponding to each channel lines up with it each time the tuner rotates. The manual calls it "One-Set" fine tuning. If you want a bigger image of that scan let me know, that's the largest size pic I can attach.

Last edited by Adam; 06-04-2016 at 01:09 AM.
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Old 08-24-2013, 03:16 PM
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StellarTV StellarTV is offline
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Nice score! Just last night I finished installing a new 21FBP22 into the CTC10 in my living room and I'm really happy with the results. It has that same power tuner in it and I had no idea that it was the type that could be adjusted to skip channels since mine stops on all of them. Do you have the remote control on your set?
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  #4  
Old 08-24-2013, 10:26 PM
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tvcollector tvcollector is offline
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Here's some pictures of the set..

It does have a remote and the holder still in place on the back of the set..

It came from a collector in Kansas city Kansas.. He also had a bunch of other sets that were mainly B/W, and I believe other collectors have got sets from him... He's a nice guy and very honest.. The set arrived in better condition I thought it would be in.. I'm surprised the tube tests pretty descent..
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Last edited by tvcollector; 08-24-2013 at 10:31 PM.
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Old 08-25-2013, 07:51 AM
6GH8cowboy 6GH8cowboy is offline
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Very good, I see the shaft now. I removed the plate but didn,t remember seeing a little knob attached. Its silver colored unlike the others and was hiding in the bag withe the rest of the stuff.
Simmilar to the RCA's of the mid 60s, it seems, to make it skip channels. Its great to have the factory info. Sams as good as they were in a broad brush kind of way, didn't get the details that could only be gleaned from mfr specific publications.

Thanks ADAM !
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Old 08-25-2013, 08:03 AM
6GH8cowboy 6GH8cowboy is offline
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TVCOLLECTOR is a very lucky guy indeed. I slid the chassis out just enough to get to the missing thermistor and this set appears to be very clean. No smoke or dust on the HV wires even. Very little dust inside. This set has been parked in a clean undisturbed environment for a LONG time.

This is by far the oldest chassis Ive worked on for a long time. I once owned a CTC something in H.S. with a 21axp22 in it. The top of the cabinet could come off to do setups. I remember at the time wondering why it looked better than the "new sets" at sears. We all know now.
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Old 08-25-2013, 07:10 PM
6GH8cowboy 6GH8cowboy is offline
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CTC-10E first pix

Bars but no color. Initial purity awfull but a quick degauss and rough purity set and we have a good red field. I replaced the focus rectifier and HV rect. to get this much of an image but the raster still wants to bloom quite badly at high brightness. Ill be checking the CRT scocket voltages next and checking tubes.
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  #8  
Old 08-25-2013, 09:32 PM
6GH8cowboy 6GH8cowboy is offline
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remote control or mechanized madness

Took a break from recaping and looked over the remote control. The channel motor was very weak and I suspect the N.P. Run Cap. As it turns out the same motor operates the volume, tint and color controls. Everthigs geard together and what I thought was a motor on the schematic is actualy a clutch. This is going to be fun if its more than a run cap. I have a remote transmitter but it puts out nothing if powered w 4 volts.
This whole setup looks like a slot machine.
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  #9  
Old 08-26-2013, 12:57 AM
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You're welcome..

coming along I see.. I'm glad to see that you have an actual raster on the screen, may not be a good one yet, but it's good to see that it's coming along..
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  #10  
Old 09-05-2013, 10:43 AM
hudsonhornet hudsonhornet is offline
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I'm the previous owner of this set. Glad to see that you think tvcollector was 'lucky' - I hope this beast continues to cooperate and comes back to life. It was completely undisturbed for about the last 15 years. That power tuner looks like quite a nightmare! Hoping to see more updates soon. Good luck.
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Old 09-09-2013, 09:26 AM
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Looks like 10's/11's are popular lately... another great example of one!
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Old 09-09-2013, 10:26 PM
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zenithfan1 zenithfan1 is offline
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Quote:
Originally Posted by hudsonhornet View Post
I'm the previous owner of this set. Glad to see that you think tvcollector was 'lucky' - I hope this beast continues to cooperate and comes back to life. It was completely undisturbed for about the last 15 years. That power tuner looks like quite a nightmare! Hoping to see more updates soon. Good luck.
Of my CTC-7 Anderson too Thanks again for ending a long search! Gonna finish it as soon as I get a place! Sorry to hijack thread....back to your regular scheduled programming.....


This CTC-10 is beautiful! I love it! Glad it went to a "loving" home!
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  #13  
Old 09-11-2013, 04:33 PM
6GH8cowboy 6GH8cowboy is offline
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Cathode volts are Whacked!

The CRT cathode volts plunge down to 175 if the brightnes cont is advanced. The range is way too wide. In looking at the Sams I dont see a signal path for video between the Video amp and Video output. I"m sure it's a Sams oops. The Vid-out grid is way positive from what it should be at a normal setting of the brightness control. I think these two stages are likely direct coupled, but I want to make an educated guess before going further or pulling the chassis again. Any body have insight of a description of the circuit?
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Old 09-11-2013, 04:43 PM
DaveWM DaveWM is offline
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check the blanker grid, there are a couple neon light in that blanker circuit as well. I guess they are there to regulate the voltage tapped off that grid as well, all tied into the brightness control circuit. did you replace the 2uf cap?

Last edited by DaveWM; 09-11-2013 at 04:55 PM.
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  #15  
Old 09-11-2013, 06:37 PM
6GH8cowboy 6GH8cowboy is offline
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Wow Dave. Pulled two to replace it, got a phone call, finished replacing the Vert cathode cap. Just looked on the bench and there the two 1s at 450 layin there. Think I can slide the chassis back enough to do it in set. That could well be the source of the extra positive on the Vid-Out grid. Didn't notice any neon lamps in there, maybe a production change along the way
Thanks
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