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

[Mike & Coreen Smith VE9AA]

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