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Old 02-12-2011, 07:02 PM
DaveWM DaveWM is offline
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Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
whew, just about there. I restuffed one of the caps (3 section, 2 of them were open) this cleared up the audio problem (the audio not coming in except when the fine tuning was into herring bone interference on the video). the audio fine tuning is very broad now.

The poor details on fine print turned out to be the video peaking, I had it turned down all the way. It needs to be about mid point too much and it looks like ringing in the video, too little and I lose fine detail. Guess that is the way its supposed to be. I recall reading somewhere it was used to compensate for the broadcast of the day.

I checked the other 4 section check ok, power factor of about 10-15 to open the eye, but that was on 4uf 475v sections, and IIRC even new caps need some power factor adj to fully open the eye on low values like that.

The double caps were replaced at some point, and test ok so I will leave them alone.

AGC voltage had a bit of 60hrz about 100mv not sure what that is about, I think I will check some tubes in the AGC circuit and see if there is a short in there. It did not have any horz freq hash so and seems to be working just fine.

I adj the pin cushion, very good now, and the form looks exactly as it should.

The B+ has about 2v of ripple.

looking good, have to set up for purity.
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