Fantastic set!
A good 21CYP alone is worth it's weight in gold these days.
I don't know how they are on Flybacks, like most old RCA probably pretty hard if you don't adjust the Cathode current and keep everything ship shape.
A small fan on the HV cage couldn't hurt either.
Maybe we need to come up with a set of Stewart Warner gauges like we used to have on cars.
Fly Temp, Fly Current, Total Amps being drawn, HV. Auto Shut down if parameters exceeded.
