Output Voltage vs. Firing Rate (fwd)

To: "'Tesla List'" <tesla-at-pupman-dot-com>
Subject: Output Voltage vs. Firing Rate (fwd)
From: Tesla List <tesla-at-stic-dot-net>
Date: Tue, 11 Aug 1998 20:47:37 -0500
Approved: tesla-at-stic-dot-net

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From:  Antonio Carlos M. de Queiroz [SMTP:acmq-at-compuland-dot-com.br]
Sent:  Tuesday, August 11, 1998 10:34 PM
To:  Tesla List
Subject:  Re: Output Voltage vs. Firing Rate (fwd)

John Freau wrote:

> I used a 14.4kV,
> 1.5kVA, potential transformer to power the TC.  Ballast is adjustable from
> 2mH to 19mH in steps, toroid is 4" by 17", secondary is 4" by 23", #28
> formvar, close wound, primary is 19 turns, #12pvc ins. stranded wire,
> close wound at 15 degree inverted cone.  Cap is .007uF.

> Test 1:  Using this 42" spark TC with sync-gap, the sparks easily hit 40",
> at 640 watts (wallplug) as measured with a wattmeter.

I would take a look at what is the wattmeter actually measuring.
With small ballast inductance in a potential transformer, the input waveforms,
specially of the current, can be far from sinusoidal, and a wattmeter designed
for 60 Hz operation may give wrong results.

Antonio Carlos M. de Queiroz