I have had a lot of luck running low frequency inverters so far, stuff around sixty cycles or so. As far as the overshoot from using square waves have found use of 0.1 to 0.47 poly caps helps a lot in reducing overshoot. The output of the secondary benefits greatly by have a hash reduction capacitor acrost it. That and the input to the inverter. The large capacitors that you are using for brute filtering have a high resistance at the high frequencies of the overshoots and when used in with small bypass capacitors and good grounding don’t see any issues on the HV Bus. At that frequency don’t think you need to bother with shielding.

I ended up using a dynamotor on the 652 that I just finished and on one hand its lots of fun to hear it run up and all that sort of stuff the dynamotor wastes almost three amps by itself and the radio has a total current draw of around six amps under normal operation. Know that I can cut its overall current drain down to under four amps if I used a solid-state inverter.

Ray F/KA3EKH