Re: transformer lamination

• To: tesla-at-pupman-dot-com
• Subject: Re: transformer lamination
• From: Bert Hickman <bert.hickman-at-aquila-dot-com>
• Date: Fri, 07 Feb 1997 06:14:37 -0800
• Subscriber: bert.hickman-at-aquila-dot-com Fri Feb 7 22:54:31 1997

Tesla List wrote:
> 
> Subscriber: major-at-vicksburg-dot-com Fri Feb  7 00:39:27 1997
> Date: Thu, 06 Feb 1997 23:23:10 -0600
> From: RODERICK MAXWELL <major-at-vicksburg-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: transformer lamination
> 
> I have completely cleaned up and reassembled the core of the first of
> four neon transformers that I got from a sign shop in town. after I put
> it back together I checked the isolation between laminations with an ohm
> meter. And lo and behold they read low resistance. I'm not an electrical
> engineer like some of you fellas but even I know that there should be
> some sort of insulating coating between the laminations to cut down on
> eddy cuurents! Are neon cores supposed to be this way? The only thing I
> see on the laminations is some sort of metal blueing. I guess this is to
> keep them from oxidizing, I have taken appart other cores and they all
> had varnish applied. I wonder if it would hurt to apply some varnish?
> Any suggestions, or answers would be welcome!
> 
>                                Frankensteins Helper
>                                        Max

Roderick,

You're right - laminations are usually insulated from one another. A
_thin_ layer of varnish should work very well.

-- Bert --

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