Re: Tesla Coil Electrical Fields - was Dangers of running 2 coils...

  Bert -

  How do you think the resonator was excited? Was the energy transfer by
electromagnetic fields or by Faraday fields a la Terman or was it something

  Are you willing to take a stab at describing "displacement currents". Do
they even exist? I believe there are only three types of electrical
currents, active. reactive, and the vector sum of these two, the typical
WATTS, RVA, VA triangle.
  John Couture


At 05:10 PM 3/2/99 -0700, you wrote:
>Original Poster: Bert Hickman <bert.hickman-at-aquila-dot-com> 
>Tesla List wrote:
>> Original Poster: "Basura, Brian" <brian.basura-at-unistudios-dot-com>
>> John,
>> I looked at the pictures and the coils were about 14' apart.  I was running
>> about 2kva at that time if I remember correctly (we made many changes that
>> evening) and was having some trouble getting breakout with the topload
>> configuration at the time. Don't know if it makes any difference but we
>> both sharing a common ground wire (Ground rod with a 10' lead to my coil
>> then 10' more to Ross's coil).
>This makes a BIG difference - the ground wire really isn't truly at
>ground potential on a running coil because of the inductance in the
>ground line and the series resistance of the wire and grounding
>resistance to Earth. You basically created a base-excited resonator in
>the passive coil. The greatest energy transfer will occur if the natural
>loaded frequencies of the two resonators are the same, but because the
>groundwire has impulse spikes, you will see effects at any combination
>of frequencies. 
>> We did run the coils at the same time and had a blast...  I took some
>> pictures but between messing with coils, worrying about safety, and setting
>> up the other camera, I didn't notice the aperture setting got bumped and
>> ended up with so-so pictures when they were running together.  I'll try and
>> post them to my Web site this week.
>> Regards,
>> Brian D. Basura