RE: [TCML] Terry Filter Question

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

You cannot change the order of the components.  An R-C low-pass filter only works if it's built to the correct topology - it only works in one direction.

Sorry,
Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of otmaskin5@xxxxxxx
> Sent: Saturday, February 20, 2010 5:50 PM
> To: tesla@xxxxxxxxxx
> Subject: [TCML] Terry Filter Question
> 
> 
> The circuit diagrams for NST protection that I have seen have the components in
> this order:
> 
> NST hot...to MOVs & bypass capacitors...to the 1K Ohm resistor (in series)...to the
> main spark gap
> 
> My question is whether the placement of the resistor is critical within the order of
> the components.  In other words, would the components work in this order:
> 
> NST hot...to 1K Ohm resistor (in series)...to MOVs & bypass caps...to the main
> spark gap.
> 
> 
> The current project I'm working on has space limitations & a less that optimal layout
> of the lower deck components (poor planning on my part - doh!).  The second
> option would allow for more direct layout of the primary circuit wiring and save me
> some work in the process.  I'd appreciate any advice as to whether this would work
> properly.
> 
> Thanks, Dennis Hopkinton MA

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