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Old 08-05-2011, 05:29 PM
DaveWM DaveWM is offline
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Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
well the 1800 5% resistor of the back of the delay line had indeed drifted, was 2200, I had high hopes, replace it, still there, maybe a bit better but hard to say, prob me just wanting to thing it did something. there is a peaking coil after the delay line, but its got built in resistor so I cant test the resistor (one of those sqaure types with the resistor on the top, covered up.

The only thing I can think to do next is to get a good hard patter, like vert bars from the pattern generator, and see if I can see the ghost on the scope, then signal trace to see if I can find where it comes in.

while I had it out I decided to check the horz current, was only 175ma and that was at full line voltage. There was a top for 120vac and 128vac on an exposed term strip, for fun I tried 128vac, could not get the full raster, so put it back. 175ma is plenty good anyway. Maybe my HOT is getting weak.

and a new problem the vert has intermittant shakes (pic will be fine then just dims slightly and gets shaky) tapped around could not find any tubes. I was even thinking maybe the HV (boost voltage used for the vert). reseated the vert tube nothing. I am thinking of HV only because of the funny dimming that takes place when its shaking. will put the hv meter on it and see. the spells last a few seconds then stop for a short time then a few seconds...

did not clear up after warming up for 30min. this is new...
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