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fyi, part of the pincushion correction in a zenith uses a pulse from the vert to modulate the output from the horz out tube. If you look a the circuit you can see a connection to I think a 40 uf cap (C7) that ties the screen of the horz out to the vert out.
This presents as a subtle narrowing and slight keystone of the pic (much less keystone than a bad yoke).
Last edited by DaveWM; 12-24-2014 at 12:06 PM.
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