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[TowerTalk] 40m ground plane on 15m-pattern

To: <towertalk@contesting.com>
Subject: [TowerTalk] 40m ground plane on 15m-pattern
From: "Mike & Coreen Smith VE9AA" <ve9aa@nbnet.nb.ca>
Date: Sun, 26 May 2013 08:22:37 -0300
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Has anyone ever modeled a 40m ground plane?s pattern on 15m?

 

This weekend of very poor condx on 15m during CQWW WPX CW has given me extra
time to mull over what I am using on 15m.

Currently I am using a wire ground plane cut for the 40m band, base up about
10?. Antenna is wire, with 2 elevated radials, sloping down somewhat (15º
maybe). Directly fed with coax.  SWR is FB on 40 and 15m.  Hung off the top
of a Maple tree.

 

It works really well on 40m, but I am wondering if the pattern is distorted
or very elevated on 15m? (high angle?)

  Reason I ask, is I was accidentally listening on my 160m(multiband) dipole
that is only up 10? last night and many station were the same strength ! ! !


 

There?s more to it than that, but the gist of my msg is I wish to know the
elevation plot of a 15m signal on a 40m ground plane please.

 

Cheers/TNX, 

 

Mike VE9AA

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

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