Hi Jim,
Could you explain the concept of "counterpoise" for me or provide a link
to some documentation? I've never heard of anything like it...
Thanks btw,
Brandon
On Feb 5, 2010, at 9:39 PM, jimlux <jimlux@xxxxxxxxxxxxx> wrote:
Brandon Hendershot wrote:
Hi all,
I know that it's said that you need an entirely seperate ground rod
when opperating tesla coils because the high voltage grounding through
the house wiring is extremely dangerous to anything plugged into any
other grounded outlet on the same circuit.
Not precisely..
You need a separate RF return for the coil, be it a counterpoise, good
grounding system, etc.
The reason you don't want it interconnected too well with the "house
ground" is that it will propagate HV transients into your house wiring
system (by capacitive and inductive coupling).. those transients wreak
havoc on most consumer electronics.
I wouldn't say "extremely dangerous".. I'd reserve that for something
like juggling chain saws.
But what if you attached the coils
ground wire directly to the ground rod. It would be bypassing the house
wiring, so the high voltage won't be running by any precious
electronics inside the house. It shouldn't be running back up into the
house right?
Exactly.. But there is a problem because at some point, you need to bond
to the "green wire ground" at least for things that are plugged in or
that you might touch (e.g. equipment cases).
I'm trying to be minimalistic so I don't have to try to pound down a
ground rod of my own.
Think counterpoise.. a big conductive sheet.. chicken wire works well. A
circle that has radius = the height of the top load above it.
Hook that to the bottom of your secondary.
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