Re: wierd MOT's

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>" <youngs-at-konnections-dot-net>

Mark,

Welcome to the world of distorted waveforms from MOTs.  Yes, I have had the
same effect - the distorted waveform can cause the DVM "beeper" to make a
bit of buzzing, and the readings will not be accurate.  I am surprised you
are having this effect at 60 volts, however.  Usually happens above 100
volts.  Maybe your DVM is bad.  Best to use an analog meter.

Or, make a half-wave rectifier with your MO diode and cap, measure the DC
volts and divide the reading by the square root of 2 (about 1.414) to get
the approximate RMS AC volts.  Be sure to discharge your cap afterward for
safety.
--Steve


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, July 24, 2002 8:14 PM
Subject: wierd MOT's


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<A123X-at-aol-dot-com>
>
> Having finally completed my power control box I decided to try measuring
the
> voltages of my MOT's by putting only 12v into the primary and measuring
the
> secondary. The results I got were 90v output which suggests the MOT only
has
> an output of 900v. I decided to raise the variac up and the output voltage
of
> the MOT continued to fit the same pattern. Then a little past 60v my
> multimeter began making a wierd noise and not working right. Now under the
> same pattern as before the output should have only been about 500v which
is
> well below the 750vac the multimeter should be able to read. Can anyone
why
> my multimeter broke and my MOT appearently only puts out 900v?
>
> Mark
>
>
>