Thread: Muntz tv
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Old 09-23-2012, 12:18 PM
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radio nut radio nut is offline
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Join Date: Dec 2007
Location: Lima, Ohio
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So now My rectifier tube is lighting up like it is shorted. I tried other 5u4's and same problem. I think one of the electrolyitics went out. They were new but I tried to form them on a cap checker I was not used too. If there is anything else that would cause this tube issue please let me know.

Also the screen did light up before this tube issue. The magnet on the back of the crt was missing and I put one on and did get a horizontal line on the screen. the vertical is out and i am not sure why. I did get a diagram and found a bad resistor in the vertical circuit. Plus I need a 4,000 pf cap in the vertical circuit and the closest I had was 5,000. So maybe it is not letting the circuit osc. at the right frequency.

So far this tv seems to be one step forward and one step back.

So my biggest concern is the shorting out rectifier tube. I have three good ones and all start to light blue. But not in my capehart radio which uses them. So it is the tv.

I do not know what else could be the problem besides electro's. I checked the filter choke and audio, vertical and other transformers as far as resistance and they check fine. the main transformer does not have resistances listed but this set did put up a horizontal line on the screen for about 3 hours before the shorting rectifier tube started. It started on fire up last time I tried the set.

Any ideas please post them!

Last edited by radio nut; 09-23-2012 at 12:20 PM. Reason: added more
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