RE: [TCML] Variac proximity

["Lau, Gary" <Gary.Lau@xxxxxx>]

The flux leakage in power transformers is by design, minimal.  If one was routing low level audio signals near a transformer with unshielded wire, you'd probably pick up some hum.  But I don't think a few millivolts, if that much, coupled into another 120V power transformer would be a concern or even detectable in any application.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of DC Cox
> Sent: Friday, May 16, 2008 12:51 AM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Variac proximity
>
> As long as the variac is in a shielded, grounded case, no problems should
> occur.
>
> If not, ie, an open variac, place a vertical metal shield between the two,
> ground both variacs, and ground the shield.  This should shroud any magnetic
> field from interacting with the smaller variac.
>
> Dr. Resonance
>
>
>
>
> On Thu, May 15, 2008 at 6:23 PM, Lau, Gary <Gary.Lau@xxxxxx> wrote:
>
> > I believe that power transformers (with the notable exception of Tesla
> > Coils!) are designed to as thoroughly as possible, contain the magnetic
> > fields, lest they couple to unintended things resulting in losses.  Toroidal
> > transformers are particularly good at containing their magnetic fields.  So,
> > you can place anything as close as you like to your Variacs without fear of
> > electrical interaction.
> >
> > Regards, Gary Lau
> > MA, USA
> >
> > > -----Original Message-----
> > > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > > Behalf Of Phillip Strauss
> > > Sent: Thursday, May 15, 2008 6:21 PM
> > > To: tesla@xxxxxxxxxx
> > > Subject: [TCML] Variac proximity
> > >
> > > Hi all,
> > > I'm constructing a compact control cabinet for a large SRSG coil up to 10
> > Kw.  The
> > > cabinet would contain two variacs, a main 25 nominal amp unit and within
> > two or
> > > three inches of it a smaller unit to phase the SRSG (John Freau's
> > system). Is there
> > > any likelihood of negative interaction due to the proximity of the two
> > variacs.
> > > Any suggestions gratefully received,
> > > Regards,
> > > Phillip.
> > >
> > >
> > >
> __________________________________________________________________
> > > ___________
> > >
> > > 72 Tinwell Road, Stamford, Lincs PE9 2SD
> > >
> > > Tel: 01780 753008

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