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Re: Upgrade wire size?
Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <FutureT-at-aol-dot-com>
In a message dated 12/13/00 11:13:51 PM Eastern Standard Time,
> Original poster: "Sam Beck by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> Hello all,
> I' just got some 28 Ga wire from Mike Waddick last Saturday and I
> was wondering if I should rewind my 3X12 coil with the new wire in place of
> the 26 Ga wire. Is there an estimate for the performance increase? Or
> should I even bother rewinding at all? I am already pulling 13-15" arcs
> off of it.
> Sam Beck
I wouldn't bother. You may get another inch of spark if you're lucky
using the #28, but where the thin wire really helps is when you go
from let's say 1000 turns to 1600 turns (10% spark length improvement
most likely). Or from 500 turns to 1000 turns. If you had # 22 wire
on the coil now, then I'd say it was worth rewinding. Of course it's
your choice, and it may perform a little different than what I'm
suggesting, because every coil is a little different. #26 is not really
too much different than #28. Now if your gap quenching is poor, then
even the slight improvement afforded by the #28 wire may help more
than expected, by helping the quenching. So there are many factors
to consider (as usual).
If you're using a 12/30 NST, or a 15/30 NST, then you could
wind a larger 4" by 24" (or even 6" by 24") secondary using the #28,
then you can get 42" to 45" sparks, using a 120 bps sync gap at
120 bps with an LTR sized cap, and properly sized toroid. Actually
you can get results almost as good even using a static gap.