[Boatanchors] High Voltage 400 Hz Supply

[David C. Hallam]

I am considering various ways to build a HV 400 Hz supply to calibrate 
AC VTVM's.  Current requirement is obviously low and I need variable 
voltage up to 300VAC,  So what I need is some type of an inverter to 
convert from 60 Hz to 400 Hz and a transformer to step up to 300V.  As I 
see it, the inverter needs to have a voltage variable output, or can 
accept a variable line input from a 120V 60Hz variac, or I need a 400 Hz 
variac to put on the output.

Since this will have very limited usage, cost is important.  Any 
suggestions on how to do this at low cost?

David
KW4DH

-- 
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them."
Thomas Jefferson