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Old March 15th 06, 10:10 PM posted to rec.radio.amateur.antenna
 
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Default Current through coils


Cecil Moore wrote:
Richard Clark wrote:
Cecil Moore wrote:
So sue me for being lazy. :-)


The legacy of Xerox research.


Please remind us of the technical content of your posting.
Do you think experimental technical results depend upon
whom is doing the experiment? If I dropped dead, could
Tom's results change from valid to invalid?
73, Cecil http://www.qsl.net/w5dxp


Probably, since it appears you are the only one finding fault with
them.

It appears you have painted yourself into a corner by trying o apply a
paper about Tesla coils that specifically states it applies only to
inductors at self-resonance to inductors operating away from
self-resonance.

For example, if you look at this time-delay plot:

http://www.w8ji.com/inductor_current_time_delay.htm

you'll see time delay is essentially flat except near the 16MHz
self-resonant frequency and a higher-frequency resonance at 26 MHz.

If I coupled that inductor to a oscillator like a Telsa coil has, it
would indeed oscillate near the frequency where the inductor has
considerable time delay. That time delay is largely because the
inductor looks like a combination of shunt C and series L, and is
indeed in mode similar to what we find in a transmission line. It is a
narrow bandwidth effect because the resonance is high-Q. It does not
surprise me at all.

73 Tom