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Old 11-28-2011, 03:27 PM
DaveWM DaveWM is offline
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Join Date: Feb 2009
Location: Orlando FL
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while waiting to get a new scope prob (to check the PP on the output from the vert integrater) I decided to look at the input from the sync sep to the integrater. there is a 220k resistor from the output to ground, could not test it in circuit, so lifted a leg and get 1.2meg, hmmm I am hoping that this maybe allowing too high a PP input into the integrator, which would then be too high and output (including horz noise). A hint MAY have been the 8ka8 in place fo the 6ka8 tube used. Perhaps a tube jockey attempting to reduce the sync output but running a tube cold. keeping my fingers crossed. If this works it will be something I check on some of the other sets that seem to have problems with line pairing. I don't recall the plate voltage (the resistor acts like a voltage divider as its on the plate), I should have checked there but since its already out I will just replace and try again.
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