Re: [TCML] wire gauge for secondary

[Gary Lau <glau1024@xxxxxxxxx>]

Hi Bob,

I would pass on the #19 wire and look for something a LOT thinner.

If you're using a 15/60, you could be looking at some potentially long
sparks, and you don't want the secondary dimensions to be limiting your
sparks.  I would recommend a 6" diameter secondary, if only to permit a
length that doesn't limit your spark length.

Using the #19 wire will result in a lower-inductance secondary, which
requires a comparably lower-inductance primary.  Low inductance primaries
cause higher primary currents and result in greater losses in the spark
gap.

My 15/60 coil uses #26 wire on a 6" secondary.

Regards, Gary Lau
MA, USA



On Mon, Jun 21, 2010 at 1:44 PM, robert massa <massahbob@xxxxxxxxxxxxx>wrote:

>
>
>     Could use some input on new coil. I have a roll of 19 gauge wire, it's
> bigger diameter than the 24g wire I  used for my first coil, it was powered
> by a 9k20ma OBIT.  This one will be a 15k60ma NST. Have built a terry filter
> sized for the nst and have some 4.25" thin walled pvc for secondary. As #19
> will cut down on amount of wraps, would a shorter secondary with larger
> diameter be better than a taller one ?  would it be better to look for
> smaller wire ?  The aim is getting the biggest sparks of course. This is all
> a learnig experience for me and the knowledge gleened from all of your
> postings is priceless.
>       Would value some opinions, thanks Bob Massa
>
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