> So can someone clear up two points, why do I remember
> being taught about RMS=average (20 years ago now!),
> is this true for sinewaves maybe?

Perhaps you are remembering that for a regular (not true RMS) meter, the
meter responds to average value but is calibrated to indicate RMS value for
a sinewave.

Cheers,
Ken Kaarvik

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads