Topband: RX antenna transformer winding

[Don Kirk]

I've been using Radio Shack 30 AWG insulated wire (wire wrap wire) to wind
my binocular cores for RX antennas.  It comes in 50 foot spools, and you
can buy it in Blue, Red, or White.  This insulated wire has made winding of
my binocular cores a real pleasure.  No more worries about scratching the
enamel coating on the magnet wire that used to drive me nuts, and no more
messing around removing the enamel coating on the ends (I just use normal
cheap wire strippers to remove the insulation on the ends of the wires for
connection purposes).  Have never had problems using this wire without the
use of plastic/teflon sleeves (but I was also not attempting to keep the
primary and secondary turns separate (using sleeves) for purposes of
reduced capacitance between the windings in my applications)

Here are the Radio Shack part numbers for the wire I use :
Red : 278-501
White : 278-502
Blue : 278-503

Cost is $5.49 per spool.

73,
Don





On Wed, Aug 21, 2013 at 12:46 PM, George Dubovsky <n4ua.va at gmail.com> wrote:

> I have used plastic coffee stirrers from the fast food joints; they start
> out smaller and they cost the same... ;-)
>
> 73,
>
> geo - n4ua
>
>
> On Wed, Aug 21, 2013 at 11:48 AM, <n0tt1 at juno.com> wrote:
>
> > From recent postings:
> >
> > > I started using Teflon sleeves in windings because I ran out of small
> > Teflon
> > wire wrap wire I was using. Without Teflon on the wires, and with normal
> > mag
> > wire, the enamel was easily scratched. Not only that, lightning would
> > punch
> > through from enamel to core, or from wire to wire.
> >
> > ** Telon is easily nicked, the type of wire used in modern vehicles is
> > very
> > robust but with the sleeves plain ole magnet wire works well and allows
> > even
> > smaller winding bundles.
> >
> >
> > RE: binocular cores and sleeving....
> > I didn't have the right size of Teflon sleeves in my junque drawer, so I
> > cut
> > appropriate lengths of used soda straws from McD's, slit them lengthwise,
> > then cut off the excess (lengthwise).  Then I curled the cut straw
> > sections
> > and pushed them through the cores.  The result is a near perfect fit
> > with a slight overlap at the lengthwise cuts.  The overlaps can
> > be oriented toward the "outside" of the core so the wire won't
> > have a tendancy to open up the overlap.
> >
> > 73,
> > Charlie, N0TT
> > _________________
> > Topband Reflector
> >
> _________________
> Topband Reflector
>