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Re: Input power measurements
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To: tesla@pupman.com
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Subject: Re: Input power measurements
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From: Tesla List <mod1@pupman.com>
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Date: Wed, 15 Oct 1997 11:15:09 -0600 (MDT)
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Approved: mod1@poodle.pupman.com
---------- Forwarded message ----------
Date: Tue, 14 Oct 1997 22:33:18 -0700
From: Jim Lux <jimlux@earthlink.net>
To: Tesla List <tesla@pupman.com>
Subject: Re: Input power measurements
> similar. I do have a small thermocouple heater unit, Weston
> model 9997 i believe, that says "range uA 100". I'm not sure
> how or if this can be used.
How about an appropriate resistive shunt? Or, a current transformer of some
sort?
> The distortion is causing the very peak of the sine waves to be
> pinched somewhat. Also, the positive and negative half cycles
> are not symmetrical, the positive one is wider.
The tops of the sine wave being pinched might be third harmonic distortion,
which tends to create that sort of effect. I don't recall what sort of
circuit you are driving, but the asymmetry between pos and neg half cycles
might be from your spark gap doing a bit of rectification, particularly if
the two metals are dissimilar.