CT-100 on eBay

[Sandy G]

I HOPE the CRT's good, but even if it ain't, just to HAVE a CT-100 is sumpin' pretty special, in my book...Congrats !

[Electronic M]

This is purely conjecture on my part, but I think the restorer might have installed that SS HV diode as a easy way out of fixing a bad HV fillament winding on the fly.

Congrats!

Tom C.

[jeyurkon]

If you could post the information about the cabinet refinishing that was done by one of the previous owners that would be great.

I'm really glad this went to someone local to it and didn't have to travel across the country again!

[ChrisW6ATV]

Thank you all for the nice comments. The CRT test showed no emission in the test apparently, but I do not have enough details to know how exact or complete the procedure was. It was with clip leads onto a few of the CRT pins (as you would expect; I doubt there are any CRT testers with a socket for the 15GP22), and I do plan to do further testing. I have a B&K 467 CRT tester but I do not have the "universal adapter"-but this is an excuse to get the parts and make one!

I am waiting to get details of the cabinet refinishing. It is indeed a lighter color than the un-refinished areas on the edges, but it looks very nice overall.

Here are a few more pictures:



Inside of front panel insert.




Front controls, with extra potentiometers to replace original concentric ones (in right-side area).




Zenith(!) temporary back cover.

[jeyurkon]

Hey, the cover keeps the cats out! Or other nosy critters.

Is that a Westinghouse electric range on the right?

Originally Posted by ChrisW6ATV

Thank you all for the nice comments. The CRT test showed no emission in the test apparently, but I do not have enough details to know how exact or complete the procedure was. It was with clip leads onto a few of the CRT pins (as you would expect; I doubt there are any CRT testers with a socket for the 15GP22), and I do plan to do further testing. I have a B&K 467 CRT tester but I do not have the "universal adapter"-but this is an excuse to get the parts and make one!

I am waiting to get details of the cabinet refinishing. It is indeed a lighter color than the un-refinished areas on the edges, but it looks very nice overall.

Here are a few more pictures:



Inside of front panel insert.




Front controls, with extra potentiometers to replace original concentric ones (in right-side area).




Zenith(!) temporary back cover.

[vintagecollect]

keep us posted please at least a several times on your progress for restoration. Pics always keeps it interesting. A few months ago someone else did awesome thread and showed great working pics off a jig to show their progress of producing a functional set. It was a 15" set from another maker. Detailed posts really keeps interests in these rare sets alive. Many of us wont have chance to own one, great when collector shares experience of finding such a set.

[ChrisW6ATV]

Originally Posted by jeyurkon

Hey, the cover keeps the cats out! Or other nosy critters.

Is that a Westinghouse electric range on the right?

The stove is a gas O'Keefe & Merritt model 9100-1. It came with the house when I bought it in 1989. Recently, I did a complete cleaning job on the stove and probably got it the cleanest it has been since it was new. Those old stoves, like many other items from the past, were really built well.

[Eric H]

Wow, the HV might arc a little less if you just cleaned off all that soot!
Getting that Silicone off everything might be a challenge.

The Fly's on these don't put out all that much do they, most of it comes from a Tripler circuit doesn't it?

[vintagecollect]

nice pics, interesting, had a early projector that had a HV tripler circuit. IS THIS the first commercially used trpler for a TV??

There's a patent link some guys invented in around late 60s for HV tripler ss box? IF
let us know of HV setup. this is the case, I'm surprised tripler design wasn't used more-- given all the flyback meltdown issues.

[jr_tech]

Originally Posted by vintagecollect

nice pics, interesting, had a early projector that had a HV tripler circuit. IS THIS the first commercially used trpler for a TV??

Tripler??? Am I missing something here... mine has a 3A3 HV rectifier. a 1X2B Focus rectifier and a 6AU4GT damper... I don't see a tripler circuit.
jr

[Eric H]

Originally Posted by jr_tech

Tripler??? Am I missing something here... mine has a 3A3 HV rectifier. a 1X2B Focus rectifier and a 6AU4GT damper... I don't see a tripler circuit.
jr

My mistake, I thought they used that setup.

[Tom Albrecht]

Philco 48-2500 projection set has a tripler, and I think a number of other early B&W sets do.

[miniman82]

21-CT-55 has a doubler, I think. A single 3A2 for focus, and another 2 for anode supply.

[ChrisW6ATV]

I built a universal adapter for my B&K 467 CRT tester and hooked it up tonight. I have heater-to-red-cathode leakage, so I need to isolate the heater connections. All three heaters light up, and the blue, at least, does show some emission. I did not want to turn the heater voltage up to 6.3v until I get an isolation transformer on there, though.

Do any of you know if I could use an isolation-only booster for a B&W CRT for a test? I do have a couple of them here.

[ChrisW6ATV]

I tried connecting a B&W brightener in "parallel-isolation" mode after verifying its output voltage seemed OK (connecting the brightener between the tester's heater pins and the CRT), but had no success. I will get a true source of isolated 6.3v for further tests.