a real challange?

[Kevin Kuehn]

Originally Posted by Yamamaya42

It's a shame that no one has come up with a blanking mod for it over the years.

Try this:

1. Place a 47k resistor between pin 11(cathode) of the CRT and ground.

2. Connect a .05uf, 630v cap from pin 3 and 4(plate) of the 6K6 vertical output
to pin 11(cathode) of the CRT.

Basically you need a positive going vert deflection pulse at the CRT cathode in order to blank the picture during vertical retrace.