Quote:
Originally Posted by vts1134
My next hurdle to tackle is a vertical linearity problem. I'm going to go hunting in that area for any out of spec resistor and check the height and vertical linearity controls for spec.
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Using the numbers from the Sams on
http://www.earlytelevision.org/tv_sc..._diagrams.html
A logical order to test:
Check or substitute V14.
Check voltages on V14A & V14B.
Note: Remember that on this tube you are not measuring to chassis.
On V14B:
Check C58, C57 for leaking, if replaced check for correct value
and for leakage.
Check R67 for correct value.
And the two electrolytics, C2 and C1, check by jumping.
Also jump C3 across the height control.
My best guess is that the big fat C58 going from the vertical osc. plate to the high resistance grid of the vertical output is leaking.
C58 originally was only a 200 volt, I'd go at least 600 on this one, as a little leakage here can give the vert output a very hot plate.
C57 originally was a 1000 volt.
James.