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Old September 22nd 07, 10:03 AM posted to rec.radio.amateur.antenna
Dirk Claessens Dirk Claessens is offline
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First recorded activity by RadioBanter: Sep 2007
Posts: 3
Default Aerial grounding and QRM pick-up: theory & practice

On 2007-09-22, art (74.133.197.189) wrote in
message .com

In the case of a fractional wave length radiator the pendulum type
radiation is not available for radiation and thus it travels up the
outside of the coax where it can radiate or become part of the "real
resistance" of the radiator in a similar way a vertical 1/2 wave
antenna would do when half of the applied energy is absorbed by the
ground.


Sure, Navtex is broadcasted on 518/490 KHz. Even a 1/4 wavelength
antenna is beyond my real estate capabilities. :-(


Per the replies you will see what these currents are named when one
has an antenna that wants to work as a full wave length long even tho
a 1/2 wave length of the radiator is missing for max efficiency.
Hope that helps
Regards
Art KB9MZ


Thanks for the info Art, it is appreciated.

73 - Dirk

--
Dirk.
No trees were killed in the creation of this message;
however, many electrons were terribly inconvenienced.
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