Ideas for measuring voltages of Tesla coils

To: "'Tesla List'" <tesla-at-pupman-dot-com>
Subject: Ideas for measuring voltages of Tesla coils
From: Tesla List <tesla-at-stic-dot-net>
Date: Tue, 10 Mar 1998 23:00:24 -0600
Approved: tesla-at-stic-dot-net

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From:  Edward V. Phillips [SMTP:ed-at-alumni.caltech.edu]
Sent:  Tuesday, March 10, 1998 1:12 PM
To:  tesla-at-pupman-dot-com
Subject:  Re:  Ideas for measuring voltages of Tesla coils

"We made a field mill generating voltmeter a few years back and drive it
with an 1800 RPM synchronous motor.  You are correct -- the measured peak
potential from a resonance transformer is in close agreement with our
measurements using x-rays to determine the peak output potential.  We used
a 150 kV power supply to calibrate the TC by applying this to the HV toroid
with the wire connection removed.  It works and the field mill meter is
relatively easy to make.  Machining costs are relatively low -- only
required to cut out precisely the "butterfly wings" required for a
sinusoidal output although this is not really necessary with short duration
pulses.  We also use this machine to calibrate the output potential on our
VDGRF generators.

DR.RESONANCE-at-next-wave-dot-net"

	If there is corona present, how can you get accurate
estimates of the actual HV terminal voltage?

Ed