Bill Janssen wrote:

I modified a 140 watt unit using information I got from some where.
Only two capacitors had to be changed.

Was there much RF trash coming out of it?

It worked well until I tried to run a motor from it :-(.

The modified sine wave units need to be derated by about a factor of four
to run electric motors, and the motors do tend to buzz a little. What
400Hz motors do you need to run? Antenna tuner?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."