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  #1  
Old 09-03-2019, 11:57 AM
maxhifi's Avatar
maxhifi maxhifi is offline
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Quote:
Originally Posted by mr_rye89 View Post
This ol' ball of wax again.

I'm having problems with the horizontal, barely able to hold a steady picture, and I have determined the voltage is too low on the horizontal oscillator tube due to out of spec resistors in the horizontal sweep couplate. I have built simple couplates in the past using perf board, but these are some stacked up monstrosities with 12 pins. Anybody here attempt to make one of these? I'll likely try to build the new ones similar to how the old ones are made.....
Have you attempted to replace the horizontal phase detector diodes? Those are easier to change, and could possibly also cause this issue. It looks original in that photo.
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  #2  
Old 09-03-2019, 12:36 PM
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Electronic M Electronic M is offline
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Quote:
Originally Posted by maxhifi View Post
have you attempted to replace the horizontal phase detector diodes? Those are easier to change, and could possibly also cause this issue. It looks original in that photo.
+1.
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  #3  
Old 09-03-2019, 01:45 PM
old_coot88 old_coot88 is offline
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Definitely replace the dual diode if you got horz sync issues that subbing the tube don't fix.
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  #4  
Old 09-03-2019, 03:21 PM
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mr_rye89 mr_rye89 is offline
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Would silicon rectifier diodes work there? I have some of those laying around......
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