Re: BIG counterpoise

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

This is an interesting data point, but <joke>I'm sure that  Jeff  carefully
analyzed all the parameters to make sure that 50 feet was the optimum.  Of
course, the parameter in question was the convenience of the fact that
chicken wire comes in 50 foot rolls.  </joke>

I'll bet it would work just as well with half that... In fact, 16 radials,
each 25 feet long, or 32 radials, 12.5 feet long, might actually work
better, while using the same amount of wire. For that matter,  8 radials,
12.5 feet long might work just as well.

Next time you do this, Jeff, try an experiment at the end of the job (when
everyone is exhausted and all they want to do is just wrap and go
home...<grin>)... Run the test with the 50 foot radials.  Then chop them
down, 10 feet at a time (you can probably just roll the wire up, towards the
center), and see if there is any real difference.

You've got a real opportunity to do some useful experimenting, since most of
us don't get a chance to run a big coil out on an enormous flat dry lake
bed, where you don't have houses, garage doors, fences, etc. to perturb
things.



----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, December 08, 2002 12:04 PM
Subject: RE: BIG counterpoise


 > Original poster: "Jeff W. Parisse by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <jparisse-at-teslacoil-dot-com>
 >
 > Greg,,
 >
 > We used one on a dry lake bed in Death Valley CA for an Acura
 > commercial.
 >
 > We used 8 50' radials of 3' wide chicken wire (1,200 sq. ft.) with a 10'
 > copper pipe driven into a salt water pit ground (50gal.) in the middle.
 > Worked great!
 >
 > Jeff
 >
 > -Original poster: "Gregory Peters by way of Terry Fritz
 > <twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
 >
 > I'm wondering if anyone has successfully used a counterpoise on a large
 > (10kW) coil? If so, how big should it be?
 >
 >