Re: [TCML] Smallest gauge magnet wire for Secondary?

["DC Cox" <resonance@xxxxxxxxxxxx>]

Use the largest dia sec possible for max output.  If you use a 12" sec coil,
then 4.5:1 h/d produces a 54 inch winding length.

Go up a bit from 1000 turns if possible.

At 1,300 turns over 54 inches, then the math becomes:

54" winding length / 1,300 turns  =  .0415"  = 41.5 mils wire OD.

Using double build sec insulation, the closet fit is 20 AWG double insulated
magnet wire.

Top it off with a 24 x 5 or 30 x 8 inch dia toroid for high output.

Dr. Resonance





On Thu, Dec 4, 2008 at 6:03 PM, <ConorPerry@xxxxxxxxxxx> wrote:

> Looking at the price of copper wire makes me dizzy.  I'd like to build a
> 8"-12" secondary coil now.  When I work out the calculations for aspect
> ratios for tight wound secondaries the copper size ends up between 19-22
> gauge.  1000 wraps of a 8" diameter form is about 2100 feet, 12" diameter is
> 3140 feet.  That's alot of copper!
>
> I'm not worried about the winding process, setting up a rotary encoder and
> slave stepper motor won't be a problem.  So, ignoring easy to build tight
> windings ... what's the smallest gauge that's realistic?
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