CTC-4 Director 21

[Phil Nelson]

Originally Posted by SwizzyMan

I think Ive confirmed that the 3.58 oscillator is not running. I checked for waveforms on both sides of the crystal and I got nothing at all. Keep in mind I took this measurement with color control fully up, but not connected to the CRT so no HV or anything. I think I have a bad crystal.

In my CTC-4 article (http://antiqueradio.org/RCACTC-4ColorTelevision.htm ) you can read about various tests I performed around the color oscillator. It includes a procedure for bench testing your crystal, suggested by dtvmcdonald.

If you confirm that your crystal is a goner, shoot me a PM. I have a couple of spares lying around and I could donate one to the cause.

Regards,

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

[SwizzyMan]

Originally Posted by Phil Nelson

In my CTC-4 article (http://antiqueradio.org/RCACTC-4ColorTelevision.htm ) you can read about various tests I performed around the color oscillator. It includes a procedure for bench testing your crystal, suggested by dtvmcdonald.

If you confirm that your crystal is a goner, shoot me a PM. I have a couple of spares lying around and I could donate one to the cause.

Regards,

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

I'll Have to take you up on that offer! I tested for both a waveform and voltages on pin 6 of the 6AZ8 and I got absolutely nothing for both....Crystal is dead. I'll send you a PM.