12 inch secondary

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

Original poster: "D.Wightman by way of Terry Fritz <twftesla-at-uswest-dot-net>" <dwightman-at-mmcable-dot-com>

 
 
I've asked this question before, but now i'm ready to purchase the wire for my
"quite expensive" 12 inch acrylic, 72 inch long form.
What size wire? How many turns? How long?
The system will be powered by a 15 kva, 14400 vac pig. A rotary gap will be
used. And whatever size maxwell cap that is required will used..
The main reason for my re-asking this question to the list is one really good
reason. It's Kevin Eldridges coil.. He has used number 14 wire that was
purchased at your local home improvement store. This is everyday "pvc" coated
wire for home use..I have personaly seen his coil in action. He is having no
problems at all on insulation breakdown, well at least so far.. But 24 foot
sparks?
The insulation on that type of wire is fairly thick, comparing it to
traditional magnet wire. One could speculate that it is space wound. I am
leaning towards this type of wire on my 12 inch form. How many turns per inch
would this type of wire have, Who knows! I suppose that I could use # 18 wire
pvc coated and wind all 72 inches of this thing, that would make sense in
stopping arcing to the primary. How would one calculate the inductance of a
space wound coil? Is 4.5 to 1 or 6 to 1 really gonna make a big difference. How
about a 800 turn space wound secondary versus a 1500 non space wound
secondary?     Best regards......
 
----------------------------------------------------------------------------
---------------------------------
 
"Nature has stored up in the universe infinite energy.
The eternal recipient and transmitter of this infinite energy is the ether".
                                       Nikola Tesla. May 20, 1891.