Power transformer replacement??

[Tubejunke]

Nothing but good news on the TC-127!! The whole power supply/transformer issue is no more. What I have now is a raster with what looks like an out of sync picture TRYING to come in. About 2" of vertical sweep is missing. There is no sound. The worst part is the fact that after about 5 minutes the nice, bright raster starts to lose focus and fade out. Thats when I pull the plug.

I still have several paper caps to replace and check resistors and tubes, so theres a lot of possibilities. ALSO, I forgot that I still had two sections of an old electrolytic in use. One is a power supply filter and the other is an output decoupling capacitor.

I say as I get more and more caps replaced these problems will likely iron themselves out. Really the set is on the edge of success as far as I'm concerned. I started with a smoker/flamer!!!

[Tubejunke]

I'm almost there!! Still no sound at all. Thats getting kind of weird. The tuner is a bit goofy also, so in fooling with that I got a signal. With that I see that the horizontal frequency is way off. When I turn the hold control the raster starts to fade. It seems like there is something weird about the brightness and contrast adjustment as well. One of them kind of makes the picture go out of focus and pull in a shadow. The shadow kind of looks as if you are moving the ion trap.

With the improvement of pulling through a video signal I am still happy. Any advice on the missing sound anyone? Tonight I replaced a .01 black paper cap in the sound section. It measured like .165mfd. I hope THIS tranformer (Audio Output isnt burned up too!!

[Jukin Jay]

Originally Posted by Tubejunke

Nothing but good news on the TC-127!! The whole power supply/transformer issue is no more. What I have now is a raster with what looks like an out of sync picture TRYING to come in. About 2" of vertical sweep is missing. There is no sound. The worst part is the fact that after about 5 minutes the nice, bright raster starts to lose focus and fade out. Thats when I pull the plug.

I still have several paper caps to replace and check resistors and tubes, so theres a lot of possibilities. ALSO, I forgot that I still had two sections of an old electrolytic in use. One is a power supply filter and the other is an output decoupling capacitor.

I strongly suggest that you replace all of the remaining paper capacitors before applying power again. By not doing so you are risking damage to more expensive parts. Leaky paper capacitors (and by now most/all of them are leaky) cause excessive current flow which will burn out tubes, transformers, deflection yokes, etc.