You may be right there Gary. I don't know a lot about the
different types of meters. I was using a RCA Senior VoltOhmist (AC
measure by rectification and filter) which actually reads rectified and
filtered PTP and is calibrated in PTP as well as RMS, For this meter,
the RMS is only accurate if the voltage is a sine wave while the PTP is
actually Peak TO Peak of what ever the wave form is.
In the case of the squared AC output, a capacitor input filter
on the rectified output will charge to the Peak of the wave, regardless
of the shape. This means that if the thing was to be used for delivery
of DC with capacitor input filtering, it would be the same DC regardless
of wave shape.
PTP voltages being the same:
The actual power delivered by the AC output to a resistive load,
such as heaters, is more with the squared wave because the average level
of the E*I is greater for a Square Wave than for a Sine Wave.
I would like to know more about the iron vane movement. Does it
work via induced eddy currents that cause opposing magnetic fields?
John, WA5BXO
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Gary Schafer
Sent: Friday, January 17, 2003 10:22 PM
To: [email protected]
Subject: Re: [AMRadio] Today's AC Mains voltage too high for many BA
Rigs
Hi John,
I think that an "iron vane" type meter to read the voltage will give the
true rms voltage no matter what the wave form is.
73
Gary K4FMX
