[TowerTalk] 80 meter wire antenna question

Tom Osborne w7why at frontier.com
Tue Sep 22 00:12:55 EDT 2015


If you get some answers directly sent to you, I'd sure like to see what
they have to say about this.  Thinking of doing something like this with a
40 meter delta loop.  73
Tom W7WHY



On Mon, Sep 21, 2015 at 6:25 PM, Dick Allardyce (N4RA) via TowerTalk <
towertalk at contesting.com> wrote:

>
> Hi all,
>
>
> I need some advice about a wire antenna for 80 meters.  I have two 85'
> towers that support a nearly-square80 meter full-wave loop broadside to EU.
> It fits nicely, but the bottom is only about 10' off the ground.  It's fed
> in the center of one vertical sidewith a 1/4 wave of RG/11.  It works well.
> I'd like to hear of opinions or experience with adding awire parasitic
> element at this low height.  Specifically, I'd like to add a half-wave wire
> yagi element spaced about .15WL that would be switchableto 3 different
> lengths: phone director, CW reflector or phone ref/CW dir.  I change the
> physical size of the loop for CWor phone.  I'd like to remotely
> switchdirection (and mode) of the resulting antenna by changing the length
> of theyagi element.
> Any opinion as to the usefulness of a parasitic element ofthis design with
> the whole thing so near ground?  The yagi element will probably only be
> about30' in the air.  I don't expect 2 elementperformance, but I don't want
> to bother if someone already knows it would be awaste of time.
>
> 73
> Dick
> N4RA
>
>
>
>
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