We have a swamp area at the Wm H Pouch ham station W2WHP. It's not easy to
use for antennas but the fantastic performance more then makes up for it.
Over the past few years we have had a single wire inverted-L, then a set
phased for 160 meters and a set of full size wire verticals for 80 meters.
In all cases the antennas performed well worth the effort putting them up.
Placing the antennas in the swamp rather then on the edge improved the
antennas performance. A single ground rod seemed to do the job, no input
impedance difference measured when radials were installed. One important
note is the vertical section when running inverted-L's is the make sure the
vertical section is better the half the antenna total length. Also place the
coax lines into PVC pipe to prevent water damage.
We have since decided to use the swamp area only for 160 meters with a pair
of inverted-L's. The vertical section will be around 80 feet. To do this a
second tower is being installed for the single purpose of holding the rope
to hang the vertical wire sections.
Good Luck
----- Original Message -----
From: "Gary Schafer" <garyschafer@comcast.net>
To: <towertalk@contesting.com>
Sent: Monday, May 12, 2008 8:50 PM
Subject: [TowerTalk] Vertical in the swamp
> Does anyone have any experience with putting up an 80 or 40 meter vertical
> in a swamp? I have a swamp of about an acre and a half that contains
> rather
> thick undergrowth and trees that are old but not well developed.
>
>
>
> Would the trees absorb a lot of energy if a vertical was placed in the
> middle of this mess with radials lying in the mostly wet ground?
>
>
>
> What about mounting the vertical at the edge of the swamp and laying half
> the radials in the swamp floor with the others on a little higher and dry
> ground?
>
>
>
> Is it worth the trouble to invade the swamp or would it be better to keep
> clear of it?
>
> Fresh water not salt water swamp.
>
>
>
> 73
>
> Gary K4FMX
>
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