Re: Help designing 18 inch coil

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

Original poster: "Mr Gregory Peters by way of Terry Fritz <teslalist-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>

Peter,

Firstly, being an Aussie, do you have enough power to run a coil this big? 
I have a dedicated 32 amp, 240v line for my coil, which I push to 40-45 
amps for short periods. This is the biggest legal residential single phase 
supply you can get in Australia. And I do tend to cause brownouts down the 
street. I also have a 32amp/phase 3-phase supply, which I will one day use 
to make a masssive 3 phase DC supply.

I get easy 12 footers with 38 amps from my 12" coil. Unless you intend to 
run over 15KW or so, I wouldn't go any bigger than 12" on the secondary. 
Robin Copini runs his 10" coil at 20kW or so, and gets nearly 5m of spark. 
Just checking that you aren't making a huge, hard to handle coil, that you 
won't even be able to run at full potential.

I'm guessing you know what you are doing, and have access to an industrial 
supply in a factory or something. BTW, I would love to see it running!!!


Cheers,

Greg Peters
Department of Earth Sciences,
University of Queensland, Australia
Phone: 0402 841 677
http://www.geocities-dot-com/gregjpeters



----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
Date: Thursday, July 17, 2003 9:48 pm
Subject: Help designing 18 inch coil

 > Original poster: "Peter Terren by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <pterren-at-iinet-dot-net.au>
 >
 > Hi all
 > I am going ahead with an 18 inch coil and have had a very nice 18
 > x 59 inch
 > former made up from polypropylene. I am a bit undecided about
 > construction
 > of the secondary.  I have a feeling that 54 inches of 21 G at 1680
 > turns
 > would be reasonable as I have a preference for a high inductance,
 > large
 > toroid system as this seemed to be good for my 6 inch coil with
 > sparks of
 > 96 inches = 3 times the secondary length of 32 inches. I also have
 > a
 > preference for a large diameter primary possibly even with fairly
 > high (but
 > more even coupling) as per Richard Hull's Nemesis.
 > <http://www.richmond.infi-dot-net/%7Erhull/highenergy004.htm" > 
target="l">http://www.richmond.infi-dot-net/%7Erhull/highenergy004.htm>http://www.richmond.infi-dot-net/%7Erhull/highenergy004.htm
 > What would other people do (and more importantly, why)?
 >
 > Details on
 > <http://members.iinet-dot-net.au/~pterren/feedback11.htm" > 
target="l">http://members.iinet-dot-net.au/~pterren/feedback11.htm>http://members.iinet-dot-net.au/~pterren/feedback11.htm
 > Cheers
 > Peter (Tesla Downunder)
 >
 >
 >
 >
 >
 >
 >