Hi Guys,
Water has a dielectric constant of around 80, high enough to reflect most
anything, RF included. Beside getting a good ground (read low resistance) you
also need a low loss surrounding to get a nice reflex of the RF leaving the
vertical. (Horizontal radiation is not so sensitive to this, I am told.)
You should get good coverage in the direction of you pond. With the vertical
in the middle of the pond should be good in all directions.
I always wondered about this and know several has with their QTH next to
water, salt as well as fresh water ponds/lakes. They all sound better than
"the
rest of us".
Would suggest you put a vertical i a boat/float of some sort. You could then
float a feeder on the water out to the float/boat. Would probably be a neat
article in QST.
73 de N2JFS
Hans
____________________________________
From: n4zr@contesting.com
To: ve3zi@rac.ca, towertalk@contesting.com
Sent: 3/17/2009 8:25:28 A.M. Eastern Standard Time
Subj: Re: [TowerTalk] Vertical in pond
Isn't it more likely that the ground characteristics in that location are
more favorable than in the previous one? I can imagine ground well
saturated with fresh water as having a sufficient quantity of ions in
solution to improve its conductivity considerably. The fresh water itself,
on the other hand, probably doesn't matter. Or does it? Anyone have
anything beyond anecdotal experience to pass on?
73, Pete N4ZR
At 09:20 AM 3/17/2009, Roger Parsons wrote:
>Jim
>
>I'm not sure that this is exactly analagous, but I have a tri-band
>vertical mounted right at the edge of a reasonably large lake (~0.5km x
>20km). I found that that dramatically improved its performance compared to
>mounting it 100m away. The improvement was at least 10dB which changed it
>from being a waste of time to a useful second antenna - and the radial
>system (lots) was identical in each case.
>
>73 Roger
>VE3ZI
>
>
>
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