CTC-16 combo - Page 5 - Videokarma.org TV - Video

Phil Nelson · #1 03-21-2011, 09:01 PM

I have a B/W Philco with a 21" CRT that's also very slow to wake up. It tests low on emission, but with a brightener it's watchable (not perfect, but watchable) after a few minutes.

I have been debating whether to try the CR70's restore function on that one. I tried it one other time on a weak 17" tube, which helped somewhat but wasn't a miracle cure. Perhaps that would be wiser than running it on a brightener until it completely croaks . . . .

Re painting the cabinet black, I don't think that would be awful. I have a CTC-11 with enameled black cabinet and it looks fine (better than faux wood, which I don't like). When I started work on my CTC-7, I was surprised to see that RCA sold that chassis under 46 different model numbers. Who knows, maybe one of those cabinet options was black

Regards,

Phil Nelson

Findm-Keepm · #2 03-21-2011, 09:16 PM

Dave, a very nice restoration. You have the vision of a museum curator!

To restore/not to restore, I like the high road you are taking. These old color TVs are a dwindling resource, and the careful consideration you give your CRT is a good thing - I'm gonna follow your example on my weak CTC-16 CRT - I'm gonna leave it alone. Crappy grayscale when cold, but warms up to a decent pix.

And I like your new addition to our lexicon - "De-cat" (post 78 in the thread) Simpler to type than Cataract Removal!

Congrats on this set, anxious to see your next project! (and I don't care what color you paint it either!)

Cheers,

*zenithfan1* · #3 03-21-2011, 02:23 PM

If she's making a perfect picture, than I guess waiting a few minutes don't hurt. That case I'd leave it alone but I figured I'd share my experience with my tester. I also think saving the strong one for the 7 is a great idea, it's the set that will always be worth more and be more desirable.

DaveWM · #4 03-21-2011, 03:18 PM

one of my problems with the 7 is I am missing the back. Its a metal cabinet, faux wood grain, with Lots of surface rust, so not so sure of its value. I was thinking of stripping it and painting it flat black. The safty glass and mask are in good shape, the chassis has some rust, but IIRC the fly looked ok.

I think those have a metal back, maybe I can fab up something for it. I would be VERY nervous to have an exposed neck...

oh and of course only after I get it up and going to make sure its not a lost cause.

So... thats also contributing to my fence sitting...

wa2ise · #5 03-21-2011, 03:59 PM

Quote:

Originally Posted by DaveWM

I was thinking of stripping it and painting it flat black.

Not black! Then people will think that it's BPC...

ctc17 · #6 03-21-2011, 09:08 PM

Just cover it with some wallpaper with flowers on it. That way it will be preserved until you get the fake wood vinyl stuff.

DaveWM · #7 03-22-2011, 07:36 AM

Lol!! its prob been done

Quote:

Originally Posted by ctc17

just cover it with some wallpaper with flowers on it. That way it will be preserved until you get the fake wood vinyl stuff.

DaveWM · #8 03-22-2011, 09:44 AM

prob be a while before I get to the 7, I have a few others that need some attention. Looking forward to the video of the H20 de cat.

maybe adding some yeast to the water would speed things up? I get what looks like mold or fungus in there, make some pva beer while you wait.

I have a 17 with a great testing CRT but a bad cat that I would like to try the water technique, not to mention the roundies I have that I would like to do.

DaveWM · #9 03-29-2011, 10:16 AM

listening to some LP's today I could not help but notice how much better the highs are reproduced. seems like I may have to dig into the tuner MPX output at some point and rework the de-emphasis networks. I did this to another RCA(had forgotten that until just now). The LP's sound great so I figure either something has drifted in the tuner OR maybe just todays programming has been over worked towards the bass side of things for better thumping. I used to have the local public radio station to test on since it seemed to have the least "bass" processing going on, but they dropped there music format a couple years ago. Maybe it was an attempt back in the day to have a Hi filter cut as well, to get rid of hiss. I have other vintage gear that does something like that, just not as crude as chopping it all off up high.

DaveWM · #10 05-08-2011, 05:44 PM

swapped out the CRT for the one I did the de-cat on. I used foam stick on weather strip all around the edge of the lens. Lined it up on the CRT and used some packing tape on the top and bottom to just hold it in place.

the actual replacement took about 45min start to finish, most of which was from note taking on measurements on the neck parts.

Powered it up and I got a nice bright pic, but it will of course need a purity and convergence setup. I decided had done enough, so will give to that later next week when I am in the mood for it.

the old CRT is now sitting in the nasty bong water in the kiddie pool starting the de-cat process on it.

ctc17 · #11 03-21-2011, 09:23 PM

Im going to make a thread on this as so as I finish the video. Soaking in water is very effective at removing the safety glass. It just takes a few months.
At this point I would rather use room temp water rather than risk any kind of heat or force. The round crts are just to scarce.

miniman82 · #12 05-09-2011, 10:27 PM

I center the dynamic pots when setting purity, then do the complete dynamic setup. It's always possible the dynamic setup is throwing off other things, just start over and follow the manual. That's what I do whenever I think I'm smarter than what's written. lol

DaveWM · #13 05-10-2011, 07:56 AM

yea I thought about doing that. Will mark the location of where they are, center them up and then start over. I guess there is not way to "center up" the right coils short of just detuning them by backing out the slugs.

I have spare convergence coil and was even thinking of just plugging in and unplugging the mounted assy. Not sure if it was a good idea to just leave the convergencs socket empty

I got bit by the yoke winding, while sliding back, I got a finger on thebell side, I guess the insulation on the windings is not quite enough to keep that from happening. ouch....

DaveWM · #14 05-12-2011, 10:20 AM

Pics with new tube

in the B&W you can see the slight purity prob in the upper right, looks a bit greenish

sampson159 · #15 05-12-2011, 10:56 AM

looks great!is that an rca crt?the ctc 15 and 16 produce the best picture in my opinion.purity shouldnt be an issue though.did you degauss it?deguass the rear of the set also.i had a similiar issue once.turned out to be something magnetic on the shield.dont know how it hapened but i degaussed the shield and all was well.again,the picture looks great and another roundie saved!