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Re: High frequency impedance of a neon sign transformer

tesla-at-grendel.objinc-dot-com On Mon, 1 Apr 1996 12:00:37 +0700, you wrote:

>>From ed-at-alumni.caltech.edu Sun Mar 31 09:12 MST 1996
>From: ed-at-alumni.caltech.edu
>>Received: from alumni.caltech.edu (alumni.caltech.edu [131.215.50.234]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with ESMTP id IAA18026 for <tesla-at-grendel.objinc-dot-com>; Sun, 31 Mar 1996 08:24:30 -0700
>Date: Sun, 31 Mar 1996 07:23:43 -0800
>To: tesla-at-grendel.objinc-dot-com
>Subject: Re: High frequency impedance of a neon sign transformer
>
>Jim:
>	Your inductance measurement for the coil without iron 
>may be OK, although it sounds a bit high, but the DC resistance
>seems excessively high.  I'd check that one with the ohmmeter
>to be sure.  It isn't easy to get good measurements on such
>low Q devices.  Takes quite a bit pf practice to find the true
>null.  
>Ed Phillips
>
>
Ed,
	you would think, that after 30 years of using an ohm meter,
that I would be able to multiply 27 * 100 and arrive at the correct
number, but I can't:(

I just went out and measured the Rdc of my 3 secondaries,

	the Jefferson Electric 15KV 60mA	2700 ohms.
	the  (other)                      15KV 60ma   	3200 ohms
	the Franceformer         15KV 30mA	9000 ohms.

I also am finding out that it does take practice and skill to use a
LCR bridge.

	thanks for keeping me honest.

	jim