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: [email protected] > Date: Wed, 1 Apr 2015 07:47:23 -0400 > To: [email protected] > 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 > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
