CTC-4 Director 21

[Electronic M]

One thing you should do is degauss it and perform a purity adjustment.

A note the coil that changes the hue and relative demodulation of the different bars has 2 slugs one bottom and one top (should be flat edge blade adjustments)...On that coil you want to adjust both simultaneously with plastic adjustment tools (metal ones will skew the adjustment once removed).

[SwizzyMan]

Originally Posted by Electronic M

One thing you should do is degauss it and perform a purity adjustment.

A note the coil that changes the hue and relative demodulation of the different bars has 2 slugs one bottom and one top (should be flat edge blade adjustments)...On that coil you want to adjust both simultaneously with plastic adjustment tools (metal ones will skew the adjustment once removed).

Ill have to try both of those suggestions. Anyone else have any ideas? I almost feel the weak red gun may partly be at play here.

[Phil Nelson]

Instead of trying adjustments piecemeal, I would recommend working through the setup procedures described in the service manual. This article has a link to the 91-page RCA manual:

http://antiqueradio.org/RCACTC-4ColorTelevision.htm

Those procedures include purity, convergence, tracking, color AFC, etc. Follow the order given in the manual. First, as noted, make sure you have a good "black and white" picture. Then comes purity, and so on.

There's a reason why the factory doc describes this stuff in detail and in a particular order. The complete setup on an early color set is not something that the average consumer could "eyeball" by whipping out a screwdriver and turning random adjusters for a minute or two.

If you're patient and your TV is in good shape, the CTC-4 will reward you with a very nice color image.

Regards,

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

[SwizzyMan]

Originally Posted by Phil Nelson

Instead of trying adjustments piecemeal, I would recommend working through the setup procedures described in the service manual. This article has a link to the 91-page RCA manual:

http://antiqueradio.org/RCACTC-4ColorTelevision.htm

Those procedures include purity, convergence, tracking, color AFC, etc. Follow the order given in the manual. First, as noted, make sure you have a good "black and white" picture. Then comes purity, and so on.

There's a reason why the factory doc describes this stuff in detail and in a particular order. The complete setup on an early color set is not something that the average consumer could "eyeball" by whipping out a screwdriver and turning random adjusters for a minute or two.

If you're patient and your TV is in good shape, the CTC-4 will reward you with a very nice color image.

Regards,

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

I'll go through a complete set up procedure today and report back with my findings. I probably could be a bit more patient with this set but I'm a bit behind schedule on my goal to have a decent picture by Christmas.

[SwizzyMan]

So I tried going through the setup as indicated by the manual and I couldnt even get past screen temp without an issue. I followed the instructions in the manual. I couldnt get the "barely visible red screen" and I think I know why. I went to measure the bias on the Red grid and cathode as i adjusted the brightness and the voltage was way too low. Im talking almost 200v below the intended 70v. I did have all controls adjusted correctly while checking the bias and adjusting the brightness for a dim red raster. I suspect a resistor downstream of the red screen control or downstream of the cathode and grid has drifted way too low or has even shorted. I guess ill have to do some investigation. This all seems odd since I at one point did have red in my color picture and things looked pretty watchable, but now its kinda taking a turn for the worse. I have one picture attached of what it used to look like before I really recapped any paper caps.

[SwizzyMan]

Any advice anyone? I think I may have a weak tube at this point...