Rca Ctc-11 - Page 2 - Videokarma.org TV - Video

bluenorm · #16 09-26-2008, 05:17 PM

CT 11 in New York City

eberts · #17 09-26-2008, 08:06 PM

Buy this one, It's in my way.

Sandy G · #18 09-26-2008, 08:14 PM

Aww, man...(Slobber, slobber...Drool, drool...)

Blast · #19 09-26-2008, 08:15 PM

Quote:

Originally Posted by mattcarranza

That is a very cool set! By the way, is that a console in the bottom left corner of your photo?

I remember being a small child (in the 80's) and remember my grandpartents had what i now can identify simply as a zenith roundie. I remember thinking it was way cooler than my parents TV. I dont recall much about it. Ill ask my grandfather what ever happened to it.

Grandfolks ALWAYS have the COOLER stuff! Mine had color in the '60's whereas I had to buy my OWN color set in the 80's!

*zenithfan1* · #20 09-26-2008, 10:56 PM

Quote:

Originally Posted by eberts

Buy this one, It's in my way.

I'll buy it, where are you located?

*zenithfan1* · #21 09-26-2008, 11:01 PM

Quote:

Originally Posted by Blast

Grandfolks ALWAYS have the COOLER stuff! Mine had color in the '60's whereas I had to buy my OWN color set in the 80's!

Yes they do, my Grandfather was a TV repairman, he had all the coolest stuff. TVs everywhere! Drool... I wish I could have gotten to know him better, he passed away when I was very young

Blast · #22 09-27-2008, 09:53 AM

Quote:

Originally Posted by zenithfan1

Yes they do, my Grandfather was a TV repairman, he had all the coolest stuff. TVs everywhere! Drool... I wish I could have gotten to know him better, he passed away when I was very young

My grandmother used to give me some cool radios she'd find at garage sales. But my uncle and his father-in-law were both into radio and TV repair. Back in '71 when I was about 15 they were cleaning out their basements on two different occasions and I was invited to take anything I wanted. I took a friend with me and we were both just in hog heaven. As my uncle's father-in-law repaired radios and TV's professionally in the 50's and 60's I remember a LARGE number of old color sets sitting around in HIS basement (like these CTC-11's). But we both went for the radios and related parts as they were more within our (limited) scope of repair ability at the time.
Brian

HowardBanjo · #23 09-27-2008, 11:07 AM

How do I adjust the HO cathode current?

HowardBanjo · #24 09-27-2008, 11:25 AM

Also, does anybody happen to know the part number (or any identifying number) of the Flyback for a CTC-11? By the way I've already replaced the 3A3 HV rect. and the damper. I haven't replaced the 6BK4 regulator yet. Could that be it? And if I need to get a new picture tube is there a source for these? It's a 21FJP22.

jpdylon · #25 09-27-2008, 01:43 PM

There's not a real source for these CRTs. You'd have to end up pulling it from another set or have it rebuilt by hawkeye (expensive)

If it still has good grayscale and doesn't bleed like crazy on bright colors - its probably ok.

You can check the 6BK4, but if its weak or bad usually the dimness is accompanied by blooming and shrinking depending on the demand for brightness.

Checking the cathode current requires a good ammeter, some insulated probes, and a careful hand. Disconnect the cathode lead from the HO tube. if you don't know what that is look at receiving tube manual. Then connect the ammeter between the cathode pin of the HO tube and the disconnected lead. Should be somewhere between 200 and 210 millamperes. I think there was also a test insturment available at the time that allowed you to take it from the top cap - but DON'T TRY THAT WITH A NORMAL METER!

You might also get ahold of a good high quality HV probe and see what the HV is at the 2nd anode of the CRT.

Don't neglect the video section. have you checked tubes there yet? anything weak in the IF or video amplifier/output stages will cause weak contrast and dim pictures.

bluenorm · #26 09-27-2008, 02:40 PM

very nice ct 11 in the city

HowardBanjo · #27 09-29-2008, 04:09 PM

The Horizontal output cathode current is right around 200ma. So I guess it's okay. But how would I adjust it if it weren't okay? I had a 6BK4 pull kicking around so I put it in. No more "blooming" but the picture still takes about 15 minutes to get bright and it doesn't seem to get as bright as it did with the other (older/weaker?) 6BK4. I have a new one on it's way. But I still suspect that the original suspicions were correct. It needs a new CRT. So what to do now?

freakaftr8 · #28 09-29-2008, 06:15 PM

The cathode current is controlled by the Horiz efficiency coil. There is a coil mounted to the board near the Horiz output tube. This coil when your VOM is connected inline to the lead soldered to the chassis near the tube will measure the cathode current.

As for your CRT, Scotty at Hawkeye in Iowa is about your only choice to rebuild your original tube, he does great work. Otherwise wait to see if a tube comed up here in AK, or search ebay, sometimes you will see them from time to time. But all in all you are not out of luck.

Jpdylon gave you a great description of how to test the HO current and there are alot of knowladgable peeps on this site. I learned alot from these guys so far!