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Old 11-21-2008, 07:19 AM
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compucat compucat is offline
1949 Motorola 9VT1
 
Join Date: Apr 2005
Location: Suffolk, VA
Posts: 970
Got it fixed

I replaced the damper and horizontal output tubes and now the Zenith is working again. I also replaced the vertical output and oscillator tubes since I could not get the height and linearity adjusted right. I suspect the output tube might have been damaged by the failed transformer. I did replace some caps in the vertical circuit including a black beauty and one of those white ceramic caps which I believe is just a paper cap inside. The set would often for a split second pull in from the top and go back to normal as though the vertical were about to colapse. Maybe those caps in the circuit killed the vertical output transformer. I ran the set for an hour last night after touching up a few adjustments and there were no signs of vertical problems. Everything is working just as it should. I will post screen shots later. I am still amazed at the color quality of this set. For me at least, the novelty of a roundie just never wears off.
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