[TCML] Grounding a Tesla Coil (Yes, Again)
brandonhendershot at gmail.com
Mon May 3 23:53:09 MDT 2010
I'm hearing a lot about counterpoise whenever this comes up. I don't
have a lot of room to work with here, I'm only 15 working out of my
bedroom window sill. IIRC, there was a webpage on someone
experimenting with counterpoise on their concrete garage floor, and he
reported corona or plasma or something of the sort radiating from the
plate to the floor. If I were to roll out a bail of chicken wire in my
front yard, wouldn't that set my lawn on fire?
This is why I opted to burrying copper pipe(s) in the yard to make up
for a lack of horizontal space.
Oh, one more thing, does the physical position of the coil have to be
on top of the counterpoise, or can I set it aside and run a wire? I
don't know if that's just to show the similarities of a plate in a
capacitor or for whatever reason...
On May 2, 2010, at 8:36 PM, jimlux <jimlux at earthlink.net> wrote:
> Brandon Hendershot wrote:
>> Hi Everybody,
>> I live in Arizona and the ground is extremely dry here, being that
>> it's a desert and all. So trying to sink a 8 foot pool into the
>> ground just seems irrational. I was wondering if there would be any
>> significant performance drawbacks from using several (like 5)
>> shorter 2-3 foot copper pipes spread out over a 3 foot radius. Has
>> anybody ever tried setting up a grounding system like this one
> In fact, that's what a gentleman named Herb Ufer did a half century
> ago.. he was trying to develop a way to do good earth grounds for
> ammo bunkers and the like. His final best solution was what's known
> as the Concrete Encased Grounding Electrode, or Ufer Ground for
> short, and it is what the electrical code requires these days for
> just about everywhere.
> But in your case, for a TC, many short rods over an area is probably
> better than one deep one, especially if your coil is operating in
> the middle of all those rods.
> And, for that matter, a 10x10 foot piece of metal mesh laying on the
> surfae is as good as, if not better, than a bunch of rods. Rods have
> significant inductance, and not all that low a resistance. The mesh
> acts like one plate of a big capacitor, with low inductance, that
> couples directly to the earth. And even better, if your coil is
> operating above the mesh, the RF currents never even need to go into
> the earth.
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