Measuring secondary voltage (fwd)

To: "'Tesla List'" <tesla-at-pupman-dot-com>
Subject: Measuring secondary voltage (fwd)
From: Tesla List <tesla-at-stic-dot-net>
Date: Thu, 22 Jan 1998 00:28:02 -0600
Approved: tesla-at-stic-dot-net


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From:  John H. Couture [SMTP:couturejh-at-worldnet.att-dot-net]
Sent:  Wednesday, January 21, 1998 1:16 AM
To:  Tesla List
Subject:  Re: Measuring secondary voltage (fwd)

At 01:19 AM 1/20/98 +0000, you wrote:
>
>
>---------- Forwarded message ----------
>Date: Mon, 19 Jan 98 18:51:58 EST
>From: Jim Monte <JDM95003-at-UCONNVM.UCONN.EDU>
>To: tesla-at-pupman-dot-com
>Subject: Measuring secondary voltage
>
>
><from John Couture's post of Mon, 19 Jan 1998 19:17:09 +0000>
>
>>It should be noted that the Tesla coil secondary voltage can only be
>>approximated because connecting any metering instrumentation to the
>>secondary circuit would decrease the voltage by an indeterminate amount.
>
>  If you really wanted to know the voltage and were willing to spend
>  some time to find it, how about taking a series of measurements,
>  using a voltage divider with a different impedance for each
>  measurement?  By plotting measured voltage against voltage divider
>  impedance magnitude and extrapolating to infinite impedance, it
>  seems that a reasonably accurate value for the secondary voltage
>  can be measured.
>
>  Jim Monte
>
--------------------------------------------------

  Jim -

  Wouldn't "extrapolating to infinite impedance" give you infinite voltage?

  However, I believe your idea could be used by extrapolating to a very high
impedance where the reduction in voltage could be negligible.

  Maybe Robert Stephens would want to try this. It certainly could be used
for small coils.

  John Couture