Run capacitor replacement
Okay, my daily watcher has been acting up lately and I think the run cap is on its way out. I pulled the back of the set and felt it; very warm, bordering on hot. It's a 3.5 microfarad, 440VAC oval can. I've been checking around and the closest oval can run cap I can find is 4 microfarads. I'm just wondering if one of these would be a suitable replacement.
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Dumont set?
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For the Zenith colors IIRC they are all the same.
Probably the same on other brands too. Symptoms are if opened pulsating pix. Shorted fast breaker pop. 73 Zeno:smoke: LFOD ! |
The capacitor used with a CV transformer forms a resonant circuit with the winding driving it. The value is critical to proper operation, so I would really suggest finding a 3.5 uF if at all possible.
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Oh, I didn't know the type of TV mattered. It's my 1976 Electrohome C31 chassis console.
Seems to be a popular value for ceiling fan box-style capacitors, but oval cans are practically non-existent. Quote:
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:scratch2: A separate winding and a two amp fuse for a couple of pilot lights ? Strange ....
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I have an old stock Zenith - it comes with a mounting clamp as well. |
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Ahh, so that's why there's a separate winding. This set has an "Instavu" switch on the back. I have it turned off though. |
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Right on, and it will be good to know the Zenith part number in case the replacement ever goes bad. After all, this set is ran several hours a day.
PM sent. |
Those Zenith Chromacolor II can capacitors (22-7126-01) are available from TEDSS.com. The only place I've been able to find them. It looks like Zenith contracted those out to York air conditioning. TEDSS says they're slightly dented. The two I ordered had tiny dents like there were a bunch stored loose in a big box, not crushed or anything.
http://www.tedss.com/2020038517 |
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Vertical lines are usually a horizontal problem, video problem, or bad filtering effecting one of those stages. |
The Zenith is probably loaded with bad caps, including the VRT cap. Its picture is dreadful. I saw a video of the restoration of a similar one, also full of bad caps.
I suppose the next thing I'll do to the Electrohome is replace the two big filter caps just forward of the VRT. |
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