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Re: Help!(with wire size) Please!!
From: Geoffrey Schecht[SMTP:geoffs-at-onr-dot-com]
Sent: Thursday, September 04, 1997 12:04 AM
To: Tesla List
Subject: Re: Help!(with wire size) Please!!
>
>
> From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
> Sent: Wednesday, September 03, 1997 8:16 PM
> To: tesla-at-pupman-dot-com
> Subject: Re: Help!(with wire size) Please!!
>
> Hi Geoff,
>
> > From: Geoff Schecht[SMTP:geoffs-at-onr-dot-com]
> > Sent: Wednesday, September 03, 1997 2:04 PM
> > To: Tesla List
> > Subject: Re: Help!(with wire size) Please!!
> >
> > This discussion brings up the interesting question of skin
effect.....has
> > anybody experimented with winding a secondary using Litz wire?
>
> Yes! My best small/medium sized resonator is wound with Litz which a
> sharp-eyed colleague who is not into coiling scored for me for $5!!
> It is about 3" dia x 18" long (L around 20mH).
> The mini coils are the only others I've built (much smaller) that
> have performed beyond expectation and they were close-wound with
> solid wire approaching 6 skin depths diameter. I didn't make any real
> use of field control with those as they were a sight to behold with a
> shower of streamers pouring off from halfway upwards.
> All of a sudden I'm getting keen to revert to space winding as
> tests show that I can do much better with smaller spaced wire. Looks
> pretty too :)
>
> Malcolm
> <snip>
>
>
We have about 5 pounds of #30 Litz at work. I may liberate some to try a
coil with it.
I'm considering trying to thread something like 6" PVC or ABS drainpipe
with a 32 tpi thread of fairly shallow depth. Then you just lay the wire in
the grooves and give them a light coat of lacquer to hold them in place.
Different thread pitches would give varying results due to the effects of
the interwinding capacitance. It should also do interesting things to
things like winding proximity effect.
Geoff