[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TCML] largest secondary coil you'd drive with an NST
Hi Tim,
It's a bit of both ;^) As the power levels increase, this calls
for larger circuit components (primary C and L and conse-
quently larger secondary C and L). Of course there is some
flexibility to these parameters and you can increase the output
of any given coil by applying more power, within reason.
However, a larger diametered secondary coil has a greater
inductance than a smaller one and will therefore yield longer
sparks. For example, a 12" diameter secondary coil will
yield longer ouput sparks than an 8" diamter secondary coil
from a 10 kVA power source, assuming all other aspects
of the coil are identical. Of course both coils will produce
longer sparks from a 10 kVA power source than from
a 5 kVA power source. If you are sticking with NST
power, then 6" should be as large as you should need
to go for secondary coil diameter. If your going with pig
power, then you should opt for at least a 10" diameter
secondary coil, if not 12" or more to properly utilize the
available power. As far as height goes, optimum aspect
ratios (height vs diameter) are generally between 3:1 and
5:1 with the larger coils generally falling toward the lower
range and the smaller ones to the higher range. You should
choose a wire size that will allow you to wind 1000 to 1200
turns while maintaining the secondary's dimensions within
the optimum aspect ratio.
Hope this helps,
David
----- Original Message -----
From: "Tim Meehan" <btmeehan@xxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Wednesday, December 12, 2007 8:20 PM
Subject: [TCML] largest secondary coil you'd drive with an NST
Is there some given maximum size of secondary coil (diameter or height)
that
you would consider driving with an NST? For instance, I hear a lot of
people building 4-inch diameter secondary coils of various heights,
prehaps
even 6-inch diameter or so ... but is there some correlation of
transformer
KVA rating and secondary coil size, or is it really more about how much
bang
you can get out of a primary capacitor?
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla