RE: half filter?? and what all I need before primary circuit

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>

Hi Daniel:

I have written a very detailed web page about the how's and why's of
protection networks - see http://www.laushaus.com/tesla/protection.htm.

Foremost, forget about chokes.  In order of descending importance (IMO),
you want:
1) Properly set main gap width.  No, it's not part of the filter
network, but a too-wide main gap is the single greatest cause of NST
failure.
2) Safety gaps, properly set.  Of course if you just open them up, then
they're useless.
3) Series resistors AND bypass caps from NST bushings to case.  Having
just the resistors is useless, sorry.
4) MOV's.

Are the caps really more expensive than the MOV's?  Since you're using a
9kV NST and not a 15kV NST that the filter was designed to accommodate,
you could use fewer, smaller caps to save a little bit.

Regards, Gary Lau
MA, USA


> Original poster: "Langer Giv'r" <transworldsnowboarding19@xxxxxxxxxxx>
>
> Hi, i was wondering instead of using the entire terry filter design,
> could i just use the MOV's, safety gap, and resistors,  and leave out
> the highly expensive caps and still get a relative ammount of safety?
> if not... what is the best way to get protection for my 9KV30mA  "
> cheaply and effectively "
> what is all you need basically before you send off the power towards
> the tank cap and spark gap?  like filter / RF chokes / safety gap?  i
> am still a little confused and before i buy the parts (I am poor) i
> would really like to know what all to buy.   Thanks a million!
> Daniel from Canada
>