Re: Terry's Protection Filter

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Dave,

I have only worked with NSTs in this protection circuit area.  I hear pigs
don't need protection since they never fail.  I guess one or two have failed
but under really bazaar situations.  Like running them without oil for a few
years...

I sold a bunch of 80 amps EMI filters once for the input side but things like
that only help keep electrical noise off the AC wiring.

I don't think protection circuits are a concern for pigs.

Cheers,

        Terry

At 01:17 AM 7/22/2001 -0400, you wrote: 
>
> Hello Terry, all, 
>
> I was wondering if you ever considered designing a pole 
> pig compatable version of your protective filter circuit? I know 
> the 1800 volt MOVs won't take the current, but I was just 
> wondering if this circuit could be made "piggie friendly"? 
> I've found, as others have, that pole pigs are very robust 
> beasts that can easily handle the abuse of Tesla circuits, 
> but I was thinking in case one wanted to play it safe, it 
> would be nice to have a filter circuit suitable for a pole 
> pig. I'm using a lightning arrester for the safety gap of my pig 
> system, but I still have air-cores inductors for the RF filters 
> and I think these may do more harm than good. I suppose 
> the sheer toughness of pole pigs has rendered the development 
> of a filter circuit for them perceived as unneeded. Just won- 
> dering. 
>
> Sparkin' in Memphis, 
> David Rieben