[Lowfer] Interesting finding

Fri, 10 Oct 2003 21:33:23 -0400

Mike R,

>So what could I do with my aluminum plates and shafts as far as a braid
>across the bearings???

Why not drill holes and use ring lugs to connect the braid to plates and 
frame of the VC.

Ed: I'm surprise I havent seen your suggestion applied before. We are not 
rotating the VC that much so as to be concerned about wearing out the braid.

>Is it my imagination or did Bill say he was using a "butterfly"
>capacitor with no sliding contacts?

Wasn't me. I was thinking about using a VC but haven't mentioned it to 
anyone.

I'm to the point were I'm heading outside to see how the outside loop 
compares to the bench version.

Thanks.

Bill A

>From: [email protected] [mailto:[email protected]]
>On Behalf Of Ed Phillips
>Sent: Friday, October 10, 2003 11:05 AM
>To: [email protected]
>Subject: Re: [Lowfer] Interesting finding
>
>John Andrews wrote:
> >
> > Bill, et al:
> >
> > Just a caution on air variables. The weak link is the bearings, which 
>can
> > have substantial resistance. I have measured over an ohm resistance in
>some
> > of them. Use of a silver-impregnated conductive grease can help, but 
>they
> > have to be evaluated on a case by case basis.
> >
> > John A.
>
>         Is it my imagination or did Bill say he was using a "butterfly"
>capacitor with no sliding contacts?  (May have gotten that from another
>conversation..)  Anyhow, the use of a flexible pigtail connection to
>the rotating plates should eliminate effects of contact resistance and
>the added inductance should be of no concern at lowfer frequencies.
>
>Ed

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