[Elecraft] Multi Band Dipoles

[Alan Fryer]

In my opinion, one of the most effective antennas I have used is a rotatable
trap dipole such as the Cushcraft D3, D3W and D4.  I have used them all.
Advantages: Single support, easier to get up at a reasonable height than a
dipole and no drooping ends as in inverted V.  They are a bit pricey, but
are sturdy.  I mount them at the top of trees on my property, placing them
(with the help of radiation angle/terrain software}at strategic locations to
take advantage of the extreme sloping foreground that is my property.

Alan, N3BJ
Bent Mountain, VA

----- Original Message ----- 
From: <Martin.Evans at simoncarves.com>
To: <kk5f at earthlink.net>; <elecraft at mailman.qth.net>
Sent: Monday, July 05, 2004 5:37 AM
Subject: [Elecraft] Multi Band Dipoles


>
>
>
>
> snip
>
> It confirms the very dismal performance of *all* those "popular" HF short
> loading-coil verticals in comparison to the most simple, basic,
inexpensive
> quarter-wave vertical.  TANSTAAFL!
>
> Likewise, the horizontal antenna comparisons confirm the overall
> superiority of a simple dipole over other horizontal types being tested.
>
> snip
>
> Mike, I've only been at this game for 12 months so can't really comment on
> the comparisons but my multi band dipole works a treat. It is a home brew
> set up with 3 horizontal dipoles cut for 80/40/20m one above the other
with
> about 1-2 feet separation at the ends. All on the same coax with no balun
> or ground connection. The wire is cheap annealed solid copper PVC
insulated
> mains wiring cable 2.5 sq mm (slightly larger than your #14AWG). The 80m
> wires take the full weight with no problems and I keep a lot of tension on
> it using a very heavy weight and a pulley. The centre is at about 25feet
> and the ends at 30 feet and the whole thing is pretty much in the clear.
>
> You need plenty of patience to get everything resonant with lots of ladder
> climbing, hanging out of loft windows and hoisting up and down but now I
> have swr between 1.3 and 1.0 on 80,40,20 & 15. As I say I can't compare
> with anything else but I get great reports with qrp using this
arrangement.
> When I get the time will probably put up another dipole for 30m.
>
> Martin
> M0KWV
> K1#1534
>
>
>
> Why not take a look at our Web site?
> http://www.simoncarves.com
>
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