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Re: My FET T.C.

To Joel Hinchman re your query:

By pie-wound I mean wound in flat spirals--about 120 of them in my case. 
Spiraling in & out from bottom to top.  The spring-wire is used to a)
interconnect pairs of spirals on the outside, each spiral being connected
to its mate on the inside, and b) protect all the spirals against
occasional sparking to the coil itself; the 14 ga. wire "takes the heat"
of such sparking.

On Mon, 15 Nov 1999 11:35:36 -0700 Tesla List <tesla-at-pupman-dot-com> writes:
>Original Poster: "Joel Hinchman" <joel-at-molalla-dot-net> 
>
>6.	Secondary, about 1400T "pie"-wound -at- ~11T per pie.  
>Turn-turn spacing,
>n.l.t. 0.1".  Wire, mostly18 AWG tinned Cu with some 14 AWG 
>phos.-bronze
>spring-wire for outer turns.
>
>Kennan,
>
>Hi I want to know what the above means.
>
>Joel
>-----Original Message-----
>From:	Tesla List [mailto:tesla-at-pupman-dot-com]
>Sent:	Sunday, November 14, 1999 6:09 PM
>To:	tesla-at-pupman-dot-com
>Subject:	My FET T.C.
>
>Original Poster: Kennan C Herrick <kcha1-at-juno-dot-com>
>
>To Steve Young et al...
>
>Since you asked (but I was going to do it anyway), here a few
>characteristics of my MOSFET t.c:
>
>1.  Input voltage, 115VAC; output, 16-20" sparks (so far) variously
>either from a 4" c.s.d. toroid to space or from that to a ground rod.
>
>2.  Input current (so far), about 4A -at- about 50 sparks/sec.  Spark 
>rate
>variable from a hand-held "wand" from 1 at a time on up.
>
>3.  Driver-- 24, 85A, 500V power MOSFETs electrically in push-pull
>parallel, together driving the equivalent of 1 primary turn (in a
>patent-applied-for circuit).  Soon to be increased to 48, then--if my
>endurance holds out--to 72.  That will double, then treble the spark
>length (and the input current for a given spark rate).  The primary 
>is
>untuned.
>
>4.  Maximum voltage, other than at the ~110 KHz output frequency, 
>present
>in the primary apparatus at any time with any quantity of MOSFETs & 
>at
>any rep. rate, 160V.  That's one hundred and sixty volts.  Safer for 
>the
>kiddies.
>
>5.  Excitation frequency, always the instantaneous self-resonant
>frequency of the secondary.
>
>6.  Secondary, about 1400T "pie"-wound -at- ~11T per pie.  Turn-turn
>spacing, n.l.t. 0.1".  Wire, mostly18 AWG tinned Cu with some 14 AWG
>phos.-bronze spring-wire for outer turns.
>
>7.  Top electrode, currently 4" c.s.d. x 14" mean diameter.  In the 
>next
>few days to be increased to 5" c.s.d.  Material, Al flex-duct.
>
>I hope before too long to peddle my plans for a pittance.  In the
>meantime, I'd value hearing from anyone making something similar.  
>But
>post it to the List!
>
>Ken Herrick
>kcha1-at-juno-dot-com
>___________________________________________________________________
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>
>
>

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