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Old December 5th 07, 03:29 PM posted to rec.radio.amateur.antenna
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Default Loading Coils; was : Vincent antenna

Roy Lewallen wrote:
Take a look at my 2005 measurements and see if you can do what Cecil and
Yuri failed to do coherently -- use the "replacement" concept and
explain where the missing degrees went.


I didn't fail to explain them, Roy, you just failed to listen
to reason, ploinked me, and started uttering Big Lies about
me.

In my 75m mobile base-loaded bugcatcher antenna:
1. The coil occupies ~25 degrees of antenna.
2. The impedance discontinuity at the coil to stinger
junction provides a ~44 degree phase shift.
3. The stinger occupies ~11 degrees of antenna.

At resonance the antenna is electrically
25+54+11 = 90 deg long even though it is physically
only ~12 degrees long.

All of the "missing degrees" appear at the impedance
discontinuities but you already know that since I
explained this to you two years ago.
--
73, Cecil http://www.w5dxp.com


 
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