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Old March 15th 06, 07:14 PM posted to rec.radio.amateur.antenna
Richard Clark
 
Posts: n/a
Default Current through coils

On Wed, 15 Mar 2006 18:03:28 GMT, Cecil Moore wrote:

The coil data is: ~6" dia, ~6.7" long, 26.5 T, seems
very close to 4 TPI. Looks to be #14 solid wire.


Hmmm, dare I plunge into the next, obvious question?

Provide the Velocity Factor and Characteristic Impedance per the
formulas you offered:

Tom Donaly wrote:
What's the formula, Cecil?


http://www.ttr.com/TELSIKS2001-MASTER-1.pdf equation (32)

The velocity factor can also be measured from the self-
resonant frequency at 1/4WL. VF = 0.25(1/f)

I suppose you also
have something that will tell us how to find your coil's characteristic
impedance; o.k., out with it.


http://www.ttr.com/TELSIKS2001-MASTER-1.pdf equation (43)


and we can then achieve closure by comparing the same results with
Reggie's formulas.