[TowerTalk] Beverages and Trees

[Bill Heinzinger]

If all you have is maple trees, do you get more gain while the sap is
running or when in dormant state?



----- Original Message -----
From: <K7GCO@aol.com>
To: <towertalk@contesting.com>; <alsopb@gloryroad.net>
Sent: Wednesday, March 08, 2000 3:21 PM
Subject: Re: [TowerTalk] Beverages and Trees


>
> In a message dated 08.03.00 10:13:58 Pacific Standard Time,
> alsopb@gloryroad.net writes:
>
> <<
>  "Just as it is not recommended to put up vertically polarized antennas
>  between tall trees, it is not a good idea to run a Beverage antenna
>  through the woods"
>   >>
>     This is particularly true with "Iron Wood" and "Silver Maple" Trees.
> They have been know to act as "Log Periodic Reflectors and Directors.  In
W6
> land, strange Forrest fires have started without lightning?  I once showed
a
> Pine tree used a Circularly Polarized Log Periodic and feeding it just by
> bending the 50 ohm limb down for a "Limb O. Match."  Or you can just drive
a
> nail into the root system for a "Root Ground" already there and gamma
> matching at the desired feedpoint Z with a series Xc made from a circular
> strip of bark around the trunk of the right width and location.  The
bottom
> limbs are usually 1/4 Wave Limb above the Root Ground to RF but not
> electrostatically disconnect it from the Root Ground.  It's a very quiet
tree
> for receiving.
>
> I then saw in a W.W.II Radio Manual where they gamma matched a tree for an
> emergency antenna and used fence wires for beverages.
>
> There is a "Plant Stimulator" you can buy where you stick 2 nails in the
pot
> on each side of the main stem and pulsed it with square waves.  I've had a
> vertical in a tree for years and that tree has grown taller than the rest
> over 45 years with "RF Stimulation".  Regardless of the conductivity and
> capacitive affect of the wire next to it, it's compensated for by the
length
> of the main wire.  No Conflict.  I couldn't run radials so I ran spikes
into
> the big roots.  The coax was buried at night and bark colored insulated
wire
> went up the tree under the bark for the 1st 6'.  The owner still doesn't
know
> it's there.  It also had great bandwidth.  I've also stashed 3 and 5 band
> verticals in neighbors trees with the base about 30 feet off the ground.
The
> green radials were thrown over the limbs of the right length.  There were
> 20,17,15,12&10M radial limbs right there.  The coax was cut into the bark
for
> 6' and the antenna was camouflage painted.  It's called "Stealth Creative
> Antenna Installing."  Trees are great friends-even the neighbors at night.
A
> yagi in a tree is a tough installation as it gets wiggled a lot more.  I
did
> have a tri-band dipole for a pick up antenna for beam pattern testing in
the
> top of a tree.  The coax shield to the antenna on top was loaded as a top
> loaded 1/2 wave on 80 with an L network grounded to the "Root Ground."
The
> matching system was just on my side of the property line. It worked great.
I
> had no way to install the equivalent without the tree.
>
> Note! This is all absolutely true.  I did not just make it up--maybe just
a
> small part. K7GCO
>
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>


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