Vertical Blanking for the VT71?
 

Has anyone come up with one?
Terry

I didn't come up with this myself, but I tried it and it worked for me. It works like this: take C139 (which goes from pin 5 of the vert. out tube to ground, and connect a 220K resistor inbetween the cap. and ground. Then take the wire going from the first grid of the 7JP4 to ground and instead connect it between that cap. and the 220K resistor.