[Elecraft] Wire gauge for Toroids

Fri Dec 26 18:50:01 2003

The inductance of a coil depends on the core, diameter, number of turns, and
length of the coil.  If a different wire size is used, the resultant
inductance will change because the final length of the coil will be
different.  So wire size does enter into the inductance formula because it
affects the length of the coil.

Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Don Wilhelm" <[email protected]>
To: "Robert Parker" <[email protected]>; "James Byers" <[email protected]>;
"Elecraft mailing List" <[email protected]>
Sent: Friday, December 26, 2003 11:31 PM
Subject: Re: [Elecraft] Wire gauge for Toroids

> I beg to differ with Robert (BTW, that doesn't happen very often), the
> number of turns will not change if using a different gauge wire.  Look at
> the formulas published by Amidon and you will not see any reference to the
> wire size, only the core selection and the number of turns.
>
> The main reason that the SSB toroids use 28 gauge is because of the small
> size of the cores.  It is difficult enough to get the turns on the core
with
> 28 gauge, and 26 gauge would fill the core even more (i.e., one may not be
> able to wind enough turns).
>
> 73,
> Don W3FPR
>
> ----- Original Message -----
>
> > The number of turns will be different since you're using a heavier guage
> > wire.  Then again it may not make alot of difference if the guague is
not
> > much thicker than the original.  I'd suggest you go the Radio Shack and
> but
> > their magnet wire pack.  It has 3 or 4 of the most common sizes and I
> fairly
> > sure the size you want is in there.
> > Priced at about $3 so no biggie.
> >
> > Usually thinner wire is used if the toroid has a lot of turns where a
> > heavier guage wire would overrun the circumfrence of the toroid.
> >
>
>
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