[Penthode]

Originally Posted by Steve McVoy

Here is a preliminary schematic of the HV regulator circuit:

http://www.earlytelevision.org/image...olor_sweep.pdf

Interesting. Perhaps at this time, practical shunt HV regulation was not yet viable?

the circuit appears to provide a degenerative-pulse bucking arrangement so that when the HV rises, the 6BQ6 reduces the pulse to reel back the HV.

Terry