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Re: [TCML] RF Grounding

For my TC for the Physics Dept, I used a ground plane (counterpoise) made from a large aluminium sheet. It also has a rather coarse Faraday cage but probably not essential.
It also has a mains earth or separate earth wire if a terminal is available.

----- Original Message ----- From: <FIFTYGUY@xxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, March 10, 2008 3:54 AM
Subject: Re: [TCML] RF Grounding


On the note of RF ground quality, what's the consensus for establishing
a quality RF ground for "tabletop" coils?
   If a coil makes, say, up to 30" streamers, and a  connection to a known
good grounding electrode is impossible, then  what should you do?
   Is it advisable to spread out a mesh or foil  counterpoise below the
coil, and connect RF ground to that? Say the heck with it, float the RF ground,
and tie enough components together so it works?
   Do biploar coils have the problem of RF noise to  ground? If you float
the secondary of a bipolar, is any RF ground  necessary?
   Whatabout twin coils? Is it necessary to ground  their midpoint?
   I feel twins and bipolars may be especially  attractive for tabletop
coils, since they tend to attract sparks to each other's terminals and therefore
less so to surrounding objects. Is this typically the  case?

-Phil LaBudde
Center for the Advanced Study of Ballistic  Improbabilities

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