Quote:
Originally Posted by PJL
An unloaded flyback converter will have terrible regulation so a fixed load should be included that is around the maximum current draw of the GM tube.
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Most G-M flyback type supplies use either zeners or gas-discharge (neon bulbs) feedback for regulation.
A version i've built using just resistive feedback from prior to the flyback diode is rather poor, varying +/- 10-20V, but eventually settling down and staying within a few volts of the 430V it was designed for. Even while settling it is within the G-M plateau, but its still not a design i'll be using with expensive tubes.