On Fri, 22 Jan 2010 19:29:24 -0500, "Michael Robinson"
wrote:


"John Fields" wrote in message
.. .
Does that meter on the left measure rms?
What's the waveform?
If you had a sinewave and two true rms measurements, then obviously the
theory predicts the rectified voltage will be about .707 of the ac less
diode drops...
Maybe the meter on the left measures average voltage and corrects it by a
factor of about 11% to give an artificial rms reading. But that's accurate
only for a pure sine wave. Maybe you hooked up a transformer to line power,
which typically gets flat-topped by all the filter caps in power supplies
for electronic devices.
You left an awful lot out of your post. Want to come clean?


Maybe you should learn how to post a reply to Usenet before re-invading
the forum again.