[Milsurplus] Design for a cheap 400Hz power supply

[J. Forster]

I have a similar puppy. This may not be an easy frequency change. It's an old
design and, if memory serves, generates the sine as a sum of square waves
(fundamenal & third harmonic). There could well be power tuned circuits as
output filters..
-J

Richard Brunner wrote:

> Yes!  I bought, inexpensively, a solid-state 24-32 vdc to 115 volt 400 cycle
> 2500 va inverter, intending to convert it to 800 cycles.   Well, Avionic
> Instruments Inc. wants $250 for the instruction book and schematic, so
> conversion is academic.  It's complicated, with 40 power transistors and a
> driver board with no visible adjustments.