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  #1  
Old 10-22-2016, 11:49 PM
old_coot88 old_coot88 is offline
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Yee-ikes! Has anybody played with the IFs?
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  #2  
Old 10-23-2016, 07:41 AM
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Radiotronman Radiotronman is offline
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I don't know, geez. I guess I'll start there....any tips?
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Old 10-23-2016, 08:57 AM
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Kevin Kuehn Kevin Kuehn is offline
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Have you tried directly injecting a video signal at the video output grid?
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Old 10-23-2016, 11:19 AM
old_coot88 old_coot88 is offline
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Quote:
Originally Posted by Radiotronman View Post
I don't know, geez. I guess I'll start there....any tips?
Before touching anything in the IFs, first you need to ascertain that the problem's not in the video chain, i.e., 'downsteam' of the video detector.
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Old 11-07-2016, 05:37 PM
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Radiotronman Radiotronman is offline
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I've been checking every resistor in the video chain with no smoking gun. Tonight I decided to check around the DC Restorer tube(6AL5). I found a 330k resistor that was many times over its value. Popped in a new resistor and was rewarded with a great picture! I've got a few caps left to replace in the separate am radio chassis and to figure out what's wrong with record player. The hardest part of this combo is done though!
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  #6  
Old 11-07-2016, 09:13 PM
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Radiotronman Radiotronman is offline
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Put in the final caps and put it all back together. Picture quality in this set is excellent!
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  #7  
Old 11-08-2016, 12:44 AM
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Phil Nelson Phil Nelson is offline
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Nice work. Those early DuMonts are the best.

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