[Elecraft] Folded Dipole Antennas

Thu Dec 4 15:16:00 2003

I should take this opportunity to point out that traps are not such a =
bad thing. The marketing departments of certain companies have jumped on =
the "no-trap is good" bandwagon to push their no-trap designs. W8JI has =
a great write-up on trap losses on his webpage.

    Dave WX7G

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of drcuthbert
Sent: Thursday, December 04, 2003 1:07 PM
To: [email protected]; [email protected]
Subject: RE: [Elecraft] Folded Dipole Antennas

Edmund,

the B&W folded dipole achieves the wide bandwidth through a lossy =
termination. The radiation efficiency is about 30% max at 40 meters and =
above. I have analyzed this antenna and designed a monopole version of =
it (see AntenneX magazine 2 years ago). The Alpha Delta appears to be a =
number of parallel dipoles. While these don't provide a great match, an =
antenna tuner is part of the installation and will make it work well. =
The Alpha Delta should be roughly 4-6 dB above the B&W.

   Dave WX7G

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Edmund T. Wright
Sent: Thursday, December 04, 2003 12:59 PM
To: [email protected]
Subject: [Elecraft] Folded Dipole Antennas

I am trying to choose between a Barker & Williamson Broadband Folded =
Dipole antenna BWD-1.8-30 and an Alpha Delta Shortened Multibander DX-CC =
for my K2.

Does anyone have any experience with either of these antennas that could =
help me decide?

Edmund Wright
AA6LZ
[email protected]

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