[Milsurplus] 800cps inverter on Craigslist in Portland

[Robert Goff]

Just noticed this today:

https://portland.craigslist.org/mlt/clt/d/wwii-us-signal-corps-inverter/6383884175.html

Output is 80V, so would still require a transformer for use with GP,
GO and TBW type gear.

I'm curious what others have done to overcome the 800 cps problem.
I've looked into motor VFD's, but all the ones I've seen top out at
400 or so.  Any brighter ideas?

73,
de Robert W7MKA