I think this is an elegant simple solution. With one more stage, it gets into the voltage range people have indicated is optimal for the receiver, and it can be built so small it easily goes onto the dynamotor’s

place. The receiver current draw is so small that i don’t think there will be any problem with regulation.

-Hue Miller

>Since the original question was power supply.  Here's a simple method I have used, a 24 volt transformer for the original series filaments.  The transformer also feeds a voltage quadrupler with common ground.  The 200 volt electrolytic capacitors were recycled from a couple of computer power supplies.  If you want more than 134 volts, the circuit can be extended to a fifth cap. 

73 de Rich KB8TAD