Whats the best way to run a set and remove the high voltage ?

[N2IXK]

Pulling the 1B3 is probably best, as it will disable ONLY the HV, not the horizontal sweep. Make sure the 1B3 plate lead is well clear of anything (including the tube socket), so it doesn't arc over. You don't actually need to remove the tube, just disconnecting the plate cap is sufficient, as it will keep the 1B3 filament load on the flyback.

Pulling the horizontal output tube as many recommend removes a substantial load from the B+, and will also kill the boost voltage. This may cause a problem for other circuits in the set.