[Milsurplus] O.T. Power Supply Design

[Hue Miller]

Most of those old conversion article seemed to think you had to adhere 
strictly to the rated dynamotor output voltage,
when a lot less would do. I was surprised to read even in a couple National 
Radio Co. manuals about running their
receivers on D.C. 'battery supplies.  They mentioned B+ value of 135 volts - 
I think this was the HRO-50 and the NC-183.

I recently saw a H.V. B+ regulator circuit that used a HV FET in a quite 
simple circuit. IIR, this was in E.R. magazine in an
article on updating the Heathkit HP-23 supply. That looked really promising 
for v.t. receiver supplies.
-Hue