here you go Timmy, don't leave me hangin'
I did notice that on the CTC-35 the vert pulse was fed into the grid of the second video amp (wrong phase for video out grid). Maybe that would be a more effective blanking, assuming its just that a weak CRT could use the help.
new link
https://www.youtube.com/watch?v=39Dl...CVtyRrqXVtll-g