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[TowerTalk] Voltage vs Current feed

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Subject: [TowerTalk] Voltage vs Current feed
From: (Tom Rauch)
Date: Mon, 15 Oct 2001 10:50:24 -0400
> Can anyone either point me to the discussion I've overlooked in one of
> these books or offer a basic definition of these terms?  Thanks!

You will have a difficult time finding those terms in engineering text 
because they are general jargon or builder's slang, rather than 
actual "systems or methods" with some particular engineering 

The term "voltage fed" is normally used when a radiator is fed at or 
near the voltage maximum, and "current fed" when a radiator is fed 
at or near a current maximum.

If the antenna itself isn't changed, and if the antenna has only one 
current maxima, changing or moving the feedpoint does not change 
the pattern or efficiency of the antenna. Moving the feedpoint 
around is mostly a matter of what the feedline sees, unless the 
antenna has more than one current maxima.

Folklore and advertising departments often attribute untrue 
efficiency advantages to voltage or elevated feeds.
73, Tom W8JI 

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