Videokarma.org TV - Video - Vintage Television & Radio Forums

Videokarma.org TV - Video - Vintage Television & Radio Forums (http://www.videokarma.org/index.php)
-   Early Color Television (http://www.videokarma.org/forumdisplay.php?f=36)
-   -   ctc 10 power tuner (http://www.videokarma.org/showthread.php?t=259315)

6GH8cowboy 08-23-2013 08:46 PM

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.

Adam 08-24-2013 12:11 PM

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.

StellarTV 08-24-2013 02:16 PM

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?

tvcollector 08-24-2013 09:26 PM

6 Attachment(s)
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..

6GH8cowboy 08-25-2013 06:51 AM

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 !

6GH8cowboy 08-25-2013 07:03 AM

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.

6GH8cowboy 08-25-2013 06:10 PM

CTC-10E first pix
 
1 Attachment(s)
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.

6GH8cowboy 08-25-2013 08:32 PM

remote control or mechanized madness
 
4 Attachment(s)
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.

tvcollector 08-25-2013 11:57 PM

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..

hudsonhornet 09-05-2013 09:43 AM

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.

Charlie 09-09-2013 08:26 AM

Looks like 10's/11's are popular lately... another great example of one!

zenithfan1 09-09-2013 09:26 PM

Quote:

Originally Posted by hudsonhornet (Post 3081412)
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 :D 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! :)

6GH8cowboy 09-11-2013 03:33 PM

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?

DaveWM 09-11-2013 03:43 PM

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?

6GH8cowboy 09-11-2013 05:37 PM

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


All times are GMT -5. The time now is 09:05 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.