You might want to take a look at some technical reports from the BBC
Engineering Department. Two in particular: RA-25 titled "Influence of Ground
and Sea on MF Propagation" and 1975-32 titled "LF and MF propagation : An
Approximate Formula for Estimating Sea Gain".
Both (and many more very interesting papers on Beverages, propagation, etc) are
available online at http://www.bbc.co.uk/rd/search?Type=Publications
Chuck
> From: w2re@hudsonvalleytowers.com
> Date: Wed, 1 Apr 2015 07:47:23 -0400
> To: topband@contesting.com
> Subject: Topband: Salt-Water Qth!
>
> This is my first post to the Top-Band Reflector, so please excuse my
> ignorance if this topic has been discussed in the past.
>
> Is there any scientific data in print to prove the theory that ocean front
> property is better than a location inland about a mile or so on a ridge
> overlooking salt water for HF. I had this heated debate over the weekend with
> two ham friends of mine while we traveled to Maine looking at real-estate
> along the coast. I understand the theory that verticals literally in or on
> the water have a huge advantage. The debate was about how far away from the
> water does it become a diminishing effect. I made the claim that the
> Ocean-Front property would be a better location than anything inland
> including a location on a ridge within a mile. This heated debate went on for
> about 500 miles while we were driving back to NY. It was a very interesting
> conversation and made the long drive back much quicker! :)
>
> Additional information about the debate:
>
> In the State of Maine there is a setback regulation on shoreline property
> regarding structures including radio towers. To play it safe with the
> shoreline protective rules, the proposed array system would be setback
> minimum 500’ from the water or as far back as 2000'. At these distances on
> 80/160 meter will a vertical antenna system see any positive effects with
> additional gain from the salt water?
>
> What about horizontal antennas? Do they see any effects from Salt-Water?
>
> I'm sure I can use HFTA to model the terrain, which I have done in the past
> with great accuracy. However, I'm not sure if it calculates Salt-Water. Maybe
> it does.
>
> We are anxious to start building in Maine ASAP. Any input would be
> appreciated.
>
> Thanks,
>
> Ray W2RE
> W2RE.com
>
>
> Sent from my iPhone
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