Re: [TCML] How necessary is a Terry Filter

[Ed Phillips <evp@xxxxxxxxxxx>]

Hi  Guys

In building a new coil I am wanting to do it right and also hope  to 
have it around for a long time. When I built my first coil I had no  
transformer protection other than a simple safety gap. Both of my  
transformers are still good even with out the filter.
I was wondering  if I really need this layer of protection? I run my coil 
with two 12/30  NST's and an RQ spark gap that contains 6 segments of 
1in. copper  couplers.
Second part I am wondering about AC line protection? I see that  some use 
an RF filter on the AC input.
If anyone has any advice /parts  list or completed Terry Filter I would 
also be interested in cost. I'm  trying to work within a pretty tight 
budget at the moment
so I would  suppose that making the filter myself would be best but just 
thought I  would ask.

As always thank you for your time and  guidance,

Vinnie"

	I'd like to add a slightly different question.  What additional protection does the filter add if the transformer is equipped with suitably-adjusted safety gaps?  Has anyone ever experienced an NST failure when it was so equipped?

Ed


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