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Old November 4th 03, 04:55 PM
Cecil Moore
 
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Richard Harrison wrote:

Cecil, W5DXP wrote:
"What EZNEC doesn`t account for is the phase delay through the
bugcatcher coil which is an appreciable percentage of a wavelength."

It needs to have enough delay to replace that missing from the resonant
length of the antenna as ON4UN shows in his Fig 9-22.


This is true in order to get the feedpoint voltage and current in phase,
i.e. in order to resonate the antenna.

The voltage needs 180 degrees round trip delay from the feedpoint to
the end of the antenna and back.

The current needs 360 degrees round trip delay from the feedpoint to
the end of the antenna and back. 180 degrees of that comes from the
reversal of direction at the open end.

Can someone please measure the delay through a 75m bugcatcher coil?
I simply do not believe it is zero, i.e. faster than light.
--
73, Cecil http://www.qsl.net/w5dxp



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