Another Westinghouse H840CK15

[old_tv_nut]

Thomas electronics is a military supplier. They were mentioned in a thread here in 2014. There does not seem to be any progress in working with them, probably because of both price and the fact that people were looking for someone who could repair pyrex glass tubes. They might be an option if you have a regular glass tube and megabucks.

[NowhereMan 1966]

Originally Posted by old_tv_nut

Thomas electronics is a military supplier. They were mentioned in a thread here in 2014. There does not seem to be any progress in working with them, probably because of both price and the fact that people were looking for someone who could repair pyrex glass tubes. They might be an option if you have a regular glass tube and megabucks.

I knew they were more of a military supplier but it seems from the literature they would take jobs, then again, as you pointed out, it could cost a lot. Even so, i figured it was good to mentioned them. Hopefully the ETF people will get a handle for this and perhaps in the future, there will be a small demand for it for others to pop up much like there is a small resurgence in vinyl records. I do see the point though where predicting the future is tough, but who knows, maybe once 3D printing gets more sophisticated.

[tubesrule]

Originally Posted by old_tv_nut

Thomas electronics is a military supplier. They were mentioned in a thread here in 2014. There does not seem to be any progress in working with them, probably because of both price and the fact that people were looking for someone who could repair pyrex glass tubes. They might be an option if you have a regular glass tube and megabucks.

I spoke with them extensively back in 2014/15. They claim they are capable of rebuilding anything including Pyrex tubes although never provided evidence of this, and that's as far as it went. They would never commit to anything for any price. They basically had no interest in our community. Perhaps someone else could pickup the torch and try contacting them.

Darryl

[ppppenguin]

I was in touch with them too a few years ago. Ultimately no result. Like Darryl, I don't think they're interested in folk like us.

[NowhereMan 1966]

Originally Posted by tubesrule

I spoke with them extensively back in 2014/15. They claim they are capable of rebuilding anything including Pyrex tubes although never provided evidence of this, and that's as far as it went. They would never commit to anything for any price. They basically had no interest in our community. Perhaps someone else could pickup the torch and try contacting them.

Darryl

Yeah, hopefully by the time when our demand will be higher, the ETF people can take care of us. I guess like with anything else, I'm sure Thomas would do it for the right price, everybody has their price as my father says. The thing is, it depends if we can pay for it. I was always a big believer in "when the door is closed, God (or whomever/whatever you believe in) opens a window" but sometimes opening a window takes action on our part too.

[trinescope]

Right now I am trying to deal with the failed vertical convergence transformer. I was not able to get a turns count due to damaged wires, and I gave up after unwinding over 6000 turns of wire which kept breaking due to corrosion. The primary was still good and I was able to get a resistance reading from that winding, but the secondary was open and I don't know a whole lot about it. The wire sizes on both windings measure the same (.003") which corresponds to a 41AWG wire. Knowing the wire resistance, winding resistance, and the approximate turns per foot of wire I get 2000 turns for the primary which would seem about right. Unfortunately the secondary resistance measurements given on the Westinghouse schematic are incorrect. Since the Sams folder on this model gives an RCA part number for this transformer as being the same as that used in the CT-100, I looked at that schematic and found very different resistance measurements as well as in the Sams folder on this set. I'm really not sure what to go with here. Also, the ratio on the secondary winding either side of the tap doesn't jive with what I know about the AC voltage requirements given on the 15GP22 datasheet. The datasheet gives a convergence/focus voltage ratio of 900:225, or 4:1, but the transformer looks more like 2.5:1 based on the resistance readings given.