[Elecraft] RF in the Trees

[Wes]

Why would it matter where it's fed? A half wave dipole has the same current distribution regardless of the feed point. 

Wes. N7WS


On Jun 27, 2014, at 5:51 AM, K8JHR <jrichards at k8jhr.com> wrote:

> Hmmm....   vertical dipole... vs... end fed half wave vertical "dipole"  - not sure these are equivalent in performance.  I know W8JI thinks the end fed half wave needs some sort of ground system-counterpoise to keep the feed line from becoming part of the antenna, so I am wondering - asking not telling - whether these two are really equivalent?  (He said reaching for his ARRL Antenna Book...)
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> I believe Jim K9YC modeled a true vertical dipole  (including the n6BT end-loaded vertical dipole) - but I would expect it to work out differently from an end fed half wave vertical.  The GAP antennas and Cuschraft R8 and R9 type are supposed to be loaded vertical dipoles, and are not, I don't think, end feds... but that is the question... are these really all equivalent?  Certainly feeding at the bottom of an end fed would be easier from a construction and deployment point of view, so I can see the obvious appeal therefor, but then does it work as well as, say, the N6TB vertical dipole fed in the middle?
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