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Old March 16th 06, 07:02 PM posted to rec.radio.amateur.antenna
Richard Clark
 
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Default Current through coils

On 16 Mar 2006 12:19:20 -0500, "Bill Turner" wrote:

Is the current the same at both ends of a mobile whip's loading coil?


Sorry Bill,

Depends....

Yes, of course not. The clear and compelling lesson to be learned is
that you CANNOT apply Kirchhoff's laws to networks that are large in
relation to wavelength. This single caveat was drilled into me in
sophomore EE.

Any variance in current measured, that is larger than errors that may
be attributed to is measurement PROVES that the size in relation to
wavelength necessarily invalidates Kirchhoff solutions. This single
truth has been observed by me at the calibration bench.

As Roy noted, it demands another set of equations. In the Metrology
field, that is what we were paid to use, or to derive. Suffice it to
say that modeling programs replace the tedium of scribbling out that
math, and just getting on with the next act.

73's
Richard Clark, KB7QHC
 
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