[Elecraft] RF in the Trees

[Dauer, Edward]

I have been playing with the two-tree solution to the one tree problem,
with a family of inverted Vees (and a K3 and KX3, for keeping this on
topic).  The "one tree problem" is that a Vee hoisted onto a top limb of a
coniferous tree is inevitably too close to if not tangled into the
branches below the apex.  So, I've been selecting two of the tallest
candidates a couple of hundred feet apart and stringing a stout nylon rope
between them.  In the middle of the cord I attach the balun for the Vees,
thereby allowing the legs to be in the clear, moveable from side to side,
and tied to smaller (8') trees at their distal ends.  In one variation on
the theme I had a 40 meter dipole as the center section of the supporting
rope, tied to the same balun as an 80 meter vee.  In another I tried a
linear-loaded 80-meter Vee, about 45' on a leg; it loaded fine but didn't
perform as well as the full length version.

The surrounding forest is very likely still a problem, but that's life in
the woods.

Ted, KN1CBR


>
>Message: 8
>Date: Wed, 25 Jun 2014 12:14:27 -0700 (GMT-07:00)
>From: Fred Townsend <fptownsend at earthlink.net>
>To: Rstafford12 <rstafford12 at gmail.com>, elecraft at mailman.qth.net
>Subject: Re: [Elecraft] extended double Zepp
>Message-ID:
>	<18197016.1403723667813.JavaMail.root at elwamui-huard.atl.sa.earthlink.net>
>	
>Content-Type: text/plain; charset=UTF-8
>
>Richard:
>I have run a double Zepp hung from the trees as you suggest. If you can
>do it I would get the antenna across the tops of the trees. 45' is too
>low for 80M unless you are running NVIS in which case you are too high at
>45'. Keep in mind that pine trees are parasitic so keep the wire, even if
>insulated, away from the trees. Inverted V works if you can't maintain
>60'.
>73,
>Fred, AE6QL
>
>
>-----Original Message-----
>>From: Rstafford12 <rstafford12 at gmail.com>
>>Sent: Jun 25, 2014 11:12 AM
>>To: elecraft at mailman.qth.net
>>Subject: [Elecraft] extended double Zepp
>>
>>I realize this is another somewhat not on topic post, but it is in
>>regards to my KX1 and KX3. I have a mature pine forest; 60 -70 foot
>>trees. How compromised would an EDZ be hung 45 feet up about four rows
>>of trees in from the perimeter? No branches or needles inside the forest
>>until 50 feet up. Richard KD0NPM
>
>