Motorola Color Television
 

I recently got this Round Tube Motorola Color Set in Iowa. It is a model 21CT220AW. I was curious if anyone had a similar model. Also I have a similar model that also uses the SAMS Folder 739-3.

Ross

I don't own this particular set but I think have seen the photofacts. If it is like the one I am thinking of it has a "hot" chassis and series filaments which is unusual for a console set. It also has dual horizontal output tubes and combines the 3.58 oscillator and chroma demods in one tube.

Clean looking set! That's the first 60s roundie Motorola I've seen. Before, only saw the pictures of the roundies from the 50s.

Have you been able to fire it up yet? How does it play?

Great looking set! I haven't EVER seen a Motorola roundie. They were so quick to have a square tube that there can't have been very many sold. Does yours work?

didnt they design the 23egp22?

sharp looking set. I too have not seen an motorola round set from this era. Im sure captianmoody really likes that set, he is into motorola as much as I am zenith.

Nice set! Almost impossible to find around here though. My electronics teacher had the exact one, His was a '64 model.
He wouldn't part with it as it was his parents first color tv.
Of course that was in 1980, Maybe I should look him up and see if he still has it....

I recognize that control set-up from an Art Margolis TV repair book. Never could figure out what kind of set it came from.

Thanks for solving a mystery that has haunted me since I was 13. (Perhaps that was a bit over-dramatic? ):D

Does Motorola use PC boards or wiring like a Zenith? Just wondering 'cause that's my favorite Zenith feature.

That set uses a metal chassis with point to point wiring like a Zenith.

Picture of the back of the set
 

Guys,

Thanks for the replies. Here is a picture of the back of the set.

Ross

Yes, it looks very Zenith-ish. Even has the service-saver test points on top of the chassis. But a series/hot chassis? Thats a bit of a letdown. :(

It is parallel wired.


Ross

Ross, I must have been mistaken in thinking your set is a series filament set, but there is a very similar model that is a hot chassis color set w/round tube, which was probably made as a cheaper alternative.

I have tried it out.
 

I tried the TV using a variac and had it on 60 volts for over an hour. I had to turn off the variac at 105 volts because I still had no picture or sound and one of the Horizontal Output Tubes was glowing cherry red. The first thing I guess that needs to be done is to replace all of the electrolytics? Then retry plugging in the TV with the variac?

Ross

Hi Ross,

Sounds like your Horiz Oscillator isn't working.
Check to see if the tube is lit, try wiggling it a little, could just be a bad connection.

If none of that works you could try replacing the paper caps in the Horiz Oscillator circuit first and see if that gets it going.

Eric