Litz Wire Secondaries

From:  D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent:  Friday, May 29, 1998 1:32 PM
To:  Tesla List
Subject:  Re: Litz Wire Secondaries

to: Richard

We did a lot of experiments with Litz wire and found very little change in
output spark -- the current was increased only 20% with Litz wire.  It did
work better on an 833 vacuum tube coil with a 4 inch dia. sec coil --
output increased 30% overall.  Rich Hull told me he noted similar results
with his magnifier systems -- Litz wire had very little effect on output
except to increase current slightly not potential.


> From:  R M Craven [SMTP:craven-at-globalnet.co.uk]
> Sent:  Thursday, May 28, 1998 6:36 PM
> To:  Tesla List
> Subject:  Litz Wire Secondaries
> Apologies if this topic has been done to death, but I haven't seen much
> discussion regarding resonator losses.
> We've talked about dielectric losses in the secondary former, but has
> compared a Litz wound secondary with a solid core secondary? Litz
> of 20 strands of 38 AWG provides optimal performance between say 50 kHz
> a couple of hundred kHz, but I don't know how much higher the Q would be
> (ignoring loading effects etc of toroid, corona etc).
> I have recently finished (thank God) making my big coil winding machine
> which will take forms upto about 24" diameter. I wound a quick closewound
> secondary (ABS former, 0.71mm magnet wire) so if i can find some similar
> overall diameter Litz, I might give it a go at comparing the performance,
> both under instrumentation conditions and also at power.
> Richard Craven, Malvern, England