Re: secondary winding spacing experiment

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "robert & june heidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

I use 1/2" copper tape with adhesive back. Everything stays in place while
you experiment and you can pull it free and re-wind several times as neaded.
The edge to edge capacitance is very small. I've used it up to 1.2 Ghz.
     Robert  H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Wed, 11 Dec 2002 08:21:22 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: secondary winding spacing experiment
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Wed, 11 Dec 2002 08:55:42 -0700
 >
 > Original poster: "george hadle by way of Terry Fritz <twftesla-at-qwest-dot-net>"
 > <ckreol1-at-yahoo-dot-com>
 >
 > I wound a coil of aluminum foil 1-2 cm wide strip.
 > Capacitance is affected by distance of plates and area
 > of plates facing each other, the latter upon which we
 > will focus. In the colorado spring notes tesla winds a
 > coil of approx 30 gauge wire with the aim of
 > decreasing distributed capacitance by decreasing the
 > area of each capacitor (turn).  It doesn't work for
 > him due to the increased resistance of the fine wire.
 > Lower Q.  As is noted in the guide to the csn, a trade
 > off is always made.
 > I wound the 8 inch form with 23 turns al foil strip in
 > a helical fashion, as one would normally wind the
 > secondary.  This decreases the area of the coils
 > facing echother to jsut the edges of the al foil.
 > freq.=1.388 MHz
 > L=.04 mH
 > C=329 pF
 > dc Resistance= 3.28 ohms.  This can be vastly
 > decreased by using layers of al foil.
 > A form of larger diameter should be tried.
 > This may be ideal as a low impedence secondary as is
 > needed in the magnifier design.
 > The width of the foil varied greatly as this was a
 > very sloppy job.
 > ideas?
 > thanks
 > george
 >
 > _
 >
 >