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#16
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Much lower chance of something with this set going bad vice a tube set. Wax caps, line safety cap, dry 'lytics... All those things can be a hazard with tube gear, but I wouldn't worry about this set. It probably works just fine.
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Evolution... |
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#17
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Quote:
![]() Electricians call them "No-Trip" breakers. http://www.inspectapedia.com/fpe/fpepanel.htm Usually, it's the electroltic caps that may fail, as the solid state era started after wax paper caps were no longer made.
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#18
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Don't forget the four-lead HV capacitor in 1970s-era color sets. These caps often went bad, causing the CRT's high voltage to skyrocket -- leading to serious trouble. White 4-lead HV caps were the worst offenders; several manufacturers sent out bulletins to TV repair shops, advising technicians to replace the white capacitor with the newer (and safer) orange one, even if the white cap was still good.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. |
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#19
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Last edited by andy; 12-05-2021 at 08:22 PM. |
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#20
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I don't recall any safety cap issues with RCA. Zenith was the main culprit with their 4-lead safety cap that was used in the early "E" and "F" line chromacolor II sets. This cap would open, causing the HV to skyrocket; thus, blowing off the neck of the CRT and damaging other parts. It wasn't long before Zenith issued an upgraded orange drop cap and the white safety cap was to be replaced, no matter the reason for service.
Magnavox also used a paper/oil 4-lead cap in several of their sets during the '70's and early '80's. In some cases, these caps would open and blow the neck off the CRT. In most cases, these caps would short and trip the circuit breaker on the back of the TV. When I run up on one of these bad caps, I now replace it with an orange drop. |
| Audiokarma |
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#21
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Camille,
One follow up - if you do do get the set to light up, and all you get is a line across the screen from left to right, don't let it run for more than a brief second or two, as the TV in this condition could "burn" a perrmanent line in the phosphor of the picture tube. Most often, it is caused by one of three conditions: A bad 470 microfarad capacitor in the vertical circuit, bad vertical output transistors, or a misplaced service/normal switch. Either way, we can help! We've got members here that ran TV shops, worked in TV shops, helped design TVs, and those like me, that grew up in TV shops. Whether it's a part or circuit diagram you need, don't be afraid to ask. We all started with post 1... Cheers,
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Brian USN RET 22YRS (Avionics/Cal) CET-Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
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#22
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Come back Camille, it's lonely over here with just us guys.
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