Re: [TCML] Some general design questions

["resonance" <resonance@xxxxxxxxxxxx>]

If possible, keep your nst and protective RF filter 4 ft. away from your 
coil.  You can use silicone GTO (neon sign) wire to run the HV to the base 
as the current is low.  One more box but putting the RF filter under the 
coil is a bad idea.

Also, in the box throw in 100 to 150 uF of PFC caps which reduces the 
current load thru your variac.  Hang varisters off each pri lead of the nst. 
Then use a good RF filter (Corcom or equiv.) on the pri side.

Use a separate ground on the base of the sec.

Dr. Resonance


Resonance Research Corp.
www.resonanceresearch.com


----- Original Message ----- 
From: "Andrew Nettles" <anettles@xxxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, November 30, 2007 9:01 PM
Subject: [TCML] Some general design questions



Regarding grounding....I'm using 2 wires of an extension cord coming out of 
the variac to a line filter, then to PFC caps, then to the NST.  The variac 
is mains grounded but everything else is RF (earth) grounded.  Everything 
except the variac will be located under the base of the coil.  After much 
reading this seems to be the right way to do it but some pictures of other 
peoples' coils suggest otherwise.

I have a srsg that needs to spin up in order to sync lock so I'm powering it 
straight from the mains and it also only uses 2 wires.  The motor housing is 
RF grounded.  I plan on powering up the rotary gap and then applying power 
to the coil with the variac as soon as the motor syncs up.

Since I'm using only 2 wires, I only need one "across the line" MOV and a 
suitable fuse for the NST power and for the sync motor power right?  Should 
I use a slowblo fuse on the NST and a fast one for the motor?

I bought MOVs for line-to-ground use but that was before I realized that I'd 
only be using 2 wires and the RF ground.  Doesn't seem like I'll need them. 
The purpose of these MOVs is just to protect the stuff hooked up to the 
mains, right?

Any input?  Much Appreciated!

Andrew
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