"cnctut" wrote in message
oups.com...
Thanks--I got off my lazy kester and did a google and found the wave
shape for a modified square wave inverter. Appreciate your input.

A modified sine wave doesn't have a 3rd harmonic, and the idea is that
eliminating is goes a long way towards reducing overheating in transformers
(since the higher the harmonic, the more it's naturally surpressed from the
core's self inductance).

---Joel Kolstad