[Milsurplus] 400 Cycle Inverter

[Richard Brunner]

This is a very long shot, but I can ask; does anyone have the schematic for:

Avionics Instruments Inc. Model 1A2500 (10)
input 24-32 vdc  output 115/26 vac single-phase 400 cycles, 2500 va
Marked TSO C-73,  Do-128 ENV CAT./GH/BHXXAEVVDFS

The manufacturer wants $250.00 for the instruction book and schematic...
Its working fine, but I would like to bump it up to 800 cycles.  Right now
it is a true "black box," about a cubic foot, 55 lb, densely packed, with 40
power transistors visible.

Richard Brunner, AA1P