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Re: [TCML] First coil

On 8/11/17 7:54 AM, Yurtle Turtle via Tesla wrote:
Does a counterpoise work best directly under the coil, or could it be buried 10' feet away, but a HUGE welding cable to connect it?
Best under the coil - you're looking for "E-field management" more than "return to earth". In fact, if you operated your coil inside a big cage, that would be best.

The "soil" isn't really supposed to be part of the circuit, so burying a ground rod 100 meters away in a salt marsh and then running a wire to your coil is sort of counter productive.

      From: Carl Noggle <cn8@xxxxxxx>
 To: Yurtle Turtle <yurtle_t@xxxxxxxxx>; Tesla Coil Mailing List <tesla@xxxxxxxxxx>
 Sent: Friday, August 11, 2017 10:50 AM
 Subject: Re: [TCML] First coil

A long wire or rod buried in a horizontal trench often makes a better
ground than a vertical rod, especially when there is caliche or rocks
that prevent digging deep holes.  The good thing about a Tesla coil is
its high impedance, so it can tolerate a high impedance ground.  I have
used a screwdriver pushed into the ground, and it worked well.  You can
pour some water into a depression around the screwdriver.  (Cheesy but

Safety ground for the power supply should, of course, return to the
service entrance (green wire) and be separate from the secondary low end

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