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rca 1956 color tv...
3/27/2001 4:16:59 AMmark French
if my previous post didn't work...found one of these in a junk store...I get static from speaker which varies with the tuner position. Picture is rather dim and bluish but I do get all 3 colors in the static specks and all 3 guns are lighting up in back so I am assuming the tube is useable (?) But that's all I get in the picture - static that varies slightly with channel position. I only see one tube not lighting up, the 1V2 in the HV cage, it is totally cold. Question is - does this set sound restorable or even worth restoring by replacing all the caps and bad tubes? It's too cool-looking to junk.
3/27/2001 9:57:04 AMNorm Leal
Hi Mark

That's a very early color TV. It will never be as good as later ones but makes a nice conversation piece.

A 1V2 tube gets its filament voltage from the Horizontal Output Transformer. It has a .625 volt filament and may not be noticeable. Check continuity between pins #4 and #5 to see if the filament is ok.

Your TV may be close to working. Try "tuner cleaner" on the contacts. Since the tuner has an effect try connecting a good antenna or cable and see what you get.

Norm


: if my previous post didn't work...found one of these in a junk store...I get static from speaker which varies with the tuner position. Picture is rather dim and bluish but I do get all 3 colors in the static specks and all 3 guns are lighting up in back so I am assuming the tube is useable (?) But that's all I get in the picture - static that varies slightly with channel position. I only see one tube not lighting up, the 1V2 in the HV cage, it is totally cold. Question is - does this set sound restorable or even worth restoring by replacing all the caps and bad tubes? It's too cool-looking to junk.

3/27/2001 8:05:03 PMPaulC
May I ask what kind it is?

If you have rastor then your 1v2 is working. When put on a
tube tester you can barely see the fillament glow.
But they will get quite hot.

Check out Http://home.att.net/~pldexnis or www.earlytelevision.org

Early color televisions are becomming more popular.

Paul


3/27/2001 10:27:31 PMNorm Leal
I don't have the schematic but some color TV's used a 1V2 as focus rectifier. He could still have a 3A3 or other tube for high voltage rectifier.

Norm


: May I ask what kind it is?


: If you have rastor then your 1v2 is working. When put on a
: tube tester you can barely see the fillament glow.
: But they will get quite hot.


: Check out Http://home.att.net/~pldexnis or www.earlytelevision.org

: Early color televisions are becomming more popular.


: Paul


3/27/2001 11:58:47 PMmark french
: : May I ask what kind it is?

It is a model CTC-5D Wescott floor model. From the sound of things here I guess first thing to do is have all the tubes tested and then go from there checking/replacing caps and resistors, does anybody know if the schematics are available online or elsewhere? thanks!....Mark French

3/28/2001 1:12:42 PMNorm Leal
Hi Mark

The schematic & alignment data is in Sam's Photofact #353. You might be able to get this through your local library. Sam's does sell the information 800-428-7267.

Norm

: : : May I ask what kind it is?

: It is a model CTC-5D Wescott floor model. From the sound of things here I guess first thing to do is have all the tubes tested and then go from there checking/replacing caps and resistors, does anybody know if the schematics are available online or elsewhere? thanks!....Mark French

3/28/2001 5:04:34 PMPaulC
: Hi Mark

: The schematic & alignment data is in Sam's Photofact #353. You might be able to get this through your local library. Sam's does sell the information 800-428-7267.

: Norm

: : : : May I ask what kind it is?

: : It is a model CTC-5D Wescott floor model. From the sound of things here I guess first thing to do is have all the tubes tested and then go from there checking/replacing caps and resistors, does anybody know if the schematics are available online or elsewhere? thanks!....Mark French

Norm. You're right about the 1v2 being a focus rectifier and the
3a3 a HV rectifier. Should have looked it up.

Schematic and service data can also be found in the 1955-1966 RCA color
TV Field Service Guide. And RCA service parts directory for
Victor television receivers 1955-1956-1957 form SP-1042.
They sometimes come up on E-Bay or check around at places like
www.agtannenbaum.com It's good to have a crosscheck since
Sams isn't always 100% correct with production changes, as
I've found out.

Paul

3/28/2001 10:24:50 AMDon Black
Hi Mark, That's an early color set and there won't be too many of this age left. Color TV was slow to take off and sales were low before the sixties. There's more working than not, though there will be repairs to
do to restore good performance. It won't be as sensitive as new sets, make sure it's got a good signal to it. Check the tuner tubes, particularly the RF tube. Someone might have set the RF AGC control to cut off the RF stage. Since there's snow it inicates most of the stages are working. Don Black.

: if my previous post didn't work...found one of these in a junk store...I get static from speaker which varies with the tuner position. Picture is rather dim and bluish but I do get all 3 colors in the static specks and all 3 guns are lighting up in back so I am assuming the tube is useable (?) But that's all I get in the picture - static that varies slightly with channel position. I only see one tube not lighting up, the 1V2 in the HV cage, it is totally cold. Question is - does this set sound restorable or even worth restoring by replacing all the caps and bad tubes? It's too cool-looking to junk.

3/30/2001 12:18:18 PMmark french
I have hooked up a good antenna to it and can now actually pull in a signal, vertical roll can be stablilized, but horiz will not unravel unless cranked all the way over beyond where it was meant to go and then i can sometimes get a warped double image of a broadcast and a little sound. Since looks pretty promising I will proceed with replacing just the paper caps first and see what improvement i get out of just that before digging any further. I don't expect the picture to look like new, in fact I would prefer it look old and quirky myself (but still viewable).

>>>>: Hi Mark, That's an early color set and there won't be too many of this age left. Color TV was slow to take off and sales were low before the sixties. There's more working than not, though there will be repairs to
: do to restore good performance. It won't be as sensitive as new sets, make sure it's got a good signal to it. Check the tuner tubes, particularly the RF tube. Someone might have set the RF AGC control to cut off the RF stage. Since there's snow it inicates most of the stages are working. Don Black.

: : if my previous post didn't work...found one of these in a junk store...I get static from speaker which varies with the tuner position. Picture is rather dim and bluish but I do get all 3 colors in the static specks and all 3 guns are lighting up in back so I am assuming the tube is useable (?) But that's all I get in the picture - static that varies slightly with channel position. I only see one tube not lighting up, the 1V2 in the HV cage, it is totally cold. Question is - does this set sound restorable or even worth restoring by replacing all the caps and bad tubes? It's too cool-looking to junk.

3/30/2001 3:57:02 PMPaulC
: I have hooked up a good antenna to it and can now actually pull in a signal, vertical roll can be stablilized, but horiz will not unravel unless cranked all the way over beyond where it was meant to go and then i can sometimes get a warped double image of a broadcast and a little sound. Since looks pretty promising I will proceed with replacing just the paper caps first and see what improvement i get out of just that before digging any further. I don't expect the picture to look like new, in fact I would prefer it look old and quirky myself (but still viewable).


Sounds like your horizontal oscillator is running way too fast.
It's also a good idea to replace the Electrolytic caps. Use individuals on a terminal strip to replace the multisection cans. Cheap insurance.
Also picking up a few television repair books from the 50's and 60's will give you much useful information.

Paul



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