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  #31  
Old 01-15-2017, 11:44 PM
Phil Nelson's Avatar
Phil Nelson Phil Nelson is offline
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Well, the doorknob cap was bad, after all. When I played the set to check another issue, a faint tick-tick returned in the HV section and then the cap failed, causing hash in the video and loud static in the audio. When I swapped in a doorknob borrowed from my National TV-7W (which has four to choose from), the picture stabilized.



I don't have a cap checker that can test at such high voltage, but out of curiosity I temporarily clipped the old doorknob cap in parallel with the good one. It immediately started hissing, so I guess it really is a goner.



There's more work to do on this set, but I'm counting this problem resolved. Thanks again for the good advice.

Regards,

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

Last edited by Phil Nelson; 01-16-2017 at 08:58 PM.
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  #32  
Old 01-17-2017, 11:05 PM
EdKozk2 EdKozk2 is offline
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Phil,
How did you get that chassis so clean looking, it almost looks new.
Ed

Last edited by EdKozk2; 01-18-2017 at 12:18 AM. Reason: spelling
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  #33  
Old 01-17-2017, 11:54 PM
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Phil Nelson Phil Nelson is offline
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Both chassis on this set had bad rust. After using Naval Jelly & the usual tomfoolery, this chassis still looked rotten, so I painted it (not my usual practice).

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html
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  #34  
Old 01-18-2017, 12:17 AM
EdKozk2 EdKozk2 is offline
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Better than having rust.
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  #35  
Old 01-18-2017, 10:56 PM
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Penthode Penthode is offline
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Nice job
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