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Old March 11th 06, 02:13 AM posted to rec.radio.amateur.antenna
 
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Default Current through coils

Cecil,

Earlier you made comments about the time delay through a 75 meter
loading inductor being somewhere around 60 nS or so.

You have consistently disagreed with me when I said time delay through
an inductor with tight mutual coupling from turn-to-turn is somewhat
close to light speed over the physical length of the inductor, rather
than the time it takes current to wind its way around through the
copper. You didn't like my measurement of a small 100uH choke, and said
a large inductor like a bug catcher coil is different. You predicted
standing waves in that inductor.

I have a 100 turn 2 inch diameter air wound inductor of pretty good
quality. It is 10 inches long.

Please tell all of us the time delay you expect in that inductor on 3.8
MHz. Please tell all of us what that delay means for your various
changing theories about waves standing in that coil.

I'll sweep the inductor from below the BC band up to 30MHz in a time
measurement mode and post the printout of the sweep with scale values
and markers that show time delays.

73 Tom

 
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