Re: [TCML] Ferrite Beads, Terry Filters, NST protection

["Tim Meehan" <btmeehan@xxxxxxxxx>]

Hi there, I'd like to see it!

Also, how much are you selling the 7.2kV "pole pig" transformers for?  :)

Tim

On Dec 2, 2007 1:38 PM, resonance <resonance@xxxxxxxxxxxx> wrote:

>
> I avoid the higher inductance chokes as they may cause a resonance with a
> neon sign xmfr.  I prefer a simple air core choke for this task.  Email
> off
> list and I will email you the schematic for the filter design I use with
> all
> nsts.
>
> Dr. Resonance
>
>
>
>
> ----- Original Message -----
> From: "Tim Meehan" <btmeehan@xxxxxxxxx>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Sent: Sunday, December 02, 2007 12:46 PM
> Subject: [TCML] Ferrite Beads, Terry Filters, NST protection
>
>
> > As I understand it, the Terry filter's purpose is to protect the NST
> from
> > HV
> > spikes.  I was wondering if putting some small ferrite beads in series
> > with
> > the high-wattage resistors would help lower the RF on the NST side of
> the
> > filter?  I have some small beads (1/2 inch long, 1/8 inch diameter, with
> > the
> > wire woven through the core of the ferrite about four times).
> >
> > My parts are still in the mail, I figured that I would build it and try
> it
> > out.  I have looked a bit for ways to hook up to the signal on the high
> > voltage without turning my o-scope into a smoking cinder.  I gather that
> > the
> > current transformer is the accepted way to do that?  I also have a BNC
> > spark
> > gap (lightning arrestor) that I was going to put in series with the
> scope
> > too ...
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> >
>
>
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