Honestly, I see nothing wrong with what your saying here. But the phrase "not limited too" comes to mind. I have alot of practical experience with "dc waveforms" and I feel due to the .707-141 conversions I think ac waveforms are sometimes abit more tricky. Perhaps it was un-wise for me you say that you are wrong. Just attempt to envision how my mind interpeates an 'ac' waveform. I believe that the dc waveform is the building block of a true sinewave this includes both positive and negative amplitude.(on the respective positions of the zero-line). Hey, troy Id like to compliment you on your co-gen system that your building in you basement, a very intreging project indeed.