--- On Mon, 3/30/09, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:
>  So if your AC voltmeter doesn't claim to measure
> "True RMS" it will only be accurate on pure sine
> waves.

SO much about old school stuff. If I

Most old analog panel meters will read "Average" Envelop voltage
of any AC voltage. It is the way the meter responds to the AC voltage.
The average value is close to RMS value but not the same.