Litz Wire Sec + 100kV 20

From:  Dale Hall [SMTP:Dale.Hall-at-trw-dot-com]
Sent:  Monday, June 01, 1998 1:38 PM
To:  Tesla List
Subject:  RE>Litz Wire Sec + 100kV 20

RE>Litz Wire Sec + 100kV 20ma Xfmr + Stuff

DC Cox, R. Hull,
In your tests w/Litz; what was largest dia Sec ? how many strands of what 
AWG ?  Anyone tried Litz on Pri (would require Cpri tune) ? 

 I'm about ready to wind an 8" dia Sec (~31" long) and have a large variety of 
Litz, enameled, and teflon insulated wire available of all AWG's.. so what AWG
 and or type will produce the longest discharges ?

Sunday I spotted a stack (~40) of 20 gal what appeared to be HDPE empty
 containers approx 24" dia by ~48" high (smoothe straight sides) with nice little
 handles outside a re-cycle wharehouse (no $ avail yet), so I began ontemplating winding two andstacking for a larger Sec coil and transportability.
  Anyone else interested ?

Sat swapmeet (TRW - Redondo Beach) there was a 2kW 100kV 20ma
xfmr for $150. The seller had removed the xfmr from its container due to the 
weight of the oil :( (may still have the container) . It was in excellent condition, 
two pri windings looked ~#12 awg, core was a loop mounted on a 2'x2"
 Al plate, all windings on one side with lots insulation in sectioned windings.
 Contact me if anyone is interested.

Other stuff: 60A variac for $150, Vacuum switch 50A 20-40kV $40, lots of vacuum variable caps up to 300 pF and 10kV $100-300   Contact me if anyone is interested.

Date: 5/29/98 10:29 PM
To: Dale Hall
From: Tesla List

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 anyone
> compared a Litz wound secondary with a solid core secondary? Litz consisting
> of 20 strands of 38 AWG provides optimal performance between say 50 kHz and
> 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