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For the retrace, I connected a .047mfd cap to the output of the VOT, followed by a 39Kohm resistor connected to the CRT cathode.
Now a 27k resistor blanks the retrace completely - even at high brightness low contrast, but it lowers the contrast overall a bit. 47k doesn't really blank the retrace at all. 33 or 39k don't completely blank the retrace in all circumstances, but don't affect the picture so much.
I also tried a .01 and .1mfd capacitor, didn't seem to make much difference. I suppose I could try a .001 or a 100pf and see what happens.
Those pictures above were taken with the .047mfd and 39Kohm as described.
Last edited by Adam; 04-07-2011 at 12:35 AM.
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