#16
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I'd start by changing the filter capacitors. Sometimes they make a set sound garbled like that, as if the speaker was torn and "blowing in the wind".
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Bryan |
#17
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Now if I only knew what a filter capacitor was and what it looked like!
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Careful with that axe, Eugene. |
#18
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It's the big ones
If those are bad, it will almost sound like the set has a putt-putt sound coming from it, commonly referred to as "motorboating". Value of them will be somewhere around 30-50 uF @ 250-350V
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"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#19
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Not a tube? It's got big square metal things sticking up sorta around the tubes. Is that them?
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Careful with that axe, Eugene. |
#20
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Re: UPDATE
Quote:
The audio output tube could be gassy or shorted; if the latter, however, your set wouldn't work at all, since a shorted tube in a series filament string will remove filament voltage from all tubes following it and will cause every tube before the shorted one to glow brighter than the rest (as they are now being forced to operate with more voltage than that for which they were designed), and one of them will burn out if the set isn't shut off in a hurry.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. |
Audiokarma |
#21
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Quote:
I had a Zenith 7H920 that was sounding a lot like the way you are describing. It turned out to be a defective tube: a 19T8 AM-FM detector/audio amp. I would definitely check out the tubes before going too far. Paula |
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