Re: Terry filter (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 14 Sep 2007 19:37:34 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Terry filter (fwd)

Hi Matthew,

I use Terry's original schematic which includes the Digikey part numbers 
as well as quantities for a given NST size.
http://www.classictesla.com/download/NST_Filter.jpg

The layout is of course up to you, but I recommend not cramping too 
tightly as arc-overs can occur between connections. It's a good idea to 
divide the circuit up into two halves on separate pc boards. Note it 
shows a safety gap 1 and 2. You can of course keep the common terminal 
(rf ground) as one terminal and have the other two terminals spaced 
adequately to each side.

There's not a lot to it and it's pretty easy to build. Just buy a couple 
pc boards to handle the components. I mounted the caps, MOV's, and small 
resistors to a pc board and inserted it into a plastic box. I mounted 
the 2 large resistors and safety gap on top of the box lid. What is 
mostly important is spacing between attachments from board to lid and 
whatever brass screws you decide to use for NST, Ground, etc.. 
connections. Just think "high voltage" when building it. When you see 
opposite potentials mechanically near one another, increase the spacing 
as necessary. This is really the most important tip for Terry filters.

Take care,
Bart



Tesla list wrote:

>---------- Forwarded message ----------
>Date: Thu, 13 Sep 2007 18:59:52 -0500
>From: Matthew Boddicker <shmerpleton_town@xxxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Terry filter
>
>This is Matthew Boddicker
>
>Could anyone give me a schematic and a parts list for a Terry filter? I was 
>given the basics at the Teslathon and now I need some more specifics.
>
>Thanks!
>Matthew Boddicker
>
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