----- Original Message -----
From: "n0tu/Steve" <[EMAIL PROTECTED]>
To: "qrp-l" <[EMAIL PROTECTED]>; "ElecraftLIST"
<[email protected]>
Sent: Tuesday, June 13, 2006 2:21 PM
Subject: [QRP-L] Feeding the Halfwave Ant
This may be silly question? I'm trying to cut down on set up time and
weight for my backpacking journeys into the field with QRP gear. The
end fed halfwave or random wire 'sounds' good to me becasue of the no
feed line and a simple LC tuner can be used. Opposed to CF halfwave
with balanced tuner (heavy toriod) and additional feedline weight?
OK heres the REAL question: once you have a halfwave, (5/8 or 3/4 wave
whatever) suspended in the tree or on a pole, Does it really matter
how it gets fed? Wouldn't end feeding give the same result (or
should?) as center or even offset feeding? Of course this assume a
it's over a pefect ground etc (But truth is I'm usually over very poor
ground situation)
It seems to me the endfed half-wave inverted vee should give me the
same result as the center fed inverted vee and have the benefit of
leaving the feedline at home. But may limit where I park my tent and
how the antenna gets supported etc? Am I missing something -- w/my
limited knowledge of antennas?
My experience has been the CF antennas have out performed (or so I
think) than my end fed setups? But I may not have properly match the
EF ants or I may be CF-biased from what I've read? Where's the TRUTH??
The classic end-fed half-wave antenna has a 1/4 wavelength counterpoise.
Here is a useful description which mentions some of your variations:
http://www.njqrp.org/n2cxantennas/halfer/index.html
73, Leon
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