From my reading of posts on many "ham" boards, the prevailing thoughts are that the nighttime skywave field intensity received from a vertical monopole is dependent on earth conductivity -- as well a
Perhaps FCC models don't take account of 'sea gain?' ITU models do, as I recall. Bill Whitacre Alexandria, VA -- _________________ Topband Reflector Archives - http://www.contesting.com/_topband
Low band hams are very aware of "sea gain" minimum salt water attenuation at low angles. The signal will not produce a perfect circle as the posting shows. 73 Bruce-K1FZ www.qsl.net/k1fz/beveragenot
Rich, Based a number of others' experiences that I've read, a vertical that is very close to the ocean has a significant advantage to paths over the ocean, vs. a similar antenna installation that's o
Here's the thread: "Modeling the proverbial 'vertical on a beach'" http://lists.contesting.com/archives//html/Topband/2014-08/msg00048.html This is another one that showed up in my search: "Hill vs.
Whoops! That link only shows a small portion of that discussion (total of 91 posts). Better to visit http://lists.contesting.com/archives//cgi-bin/namazu.cgi?idxname=Topband and search for "vertical
The link below shows the transmit site used by WFAN (which is diplexed with WCBS into the same vertical monopole). The site is located on a small island in Long Island Sound. The horizontal distance
Author: Mark Connelly via Topband <topband@contesting.com>
Date: Fri, 13 Feb 2015 12:38:08 -0500
Higher angle skip, which is what the map of ' http://s20.postimg.org/f1z0o2e7h/WFAN_Skywave.gif ' represents within the contour for WFAN, would be affected by ground conductivity in a very minor way
That describes my situation: I've got essentially a hybrid of a 160M sloper & INV-L due to my salt marsh antenna wires held up in the trees. I'm guessing my highest point is 45' and the antenna slope
Lower angle skip, such as WFAN being received in Europe, Africa, Caribbean, etc. would definitely be affected. In the extreme, the shape of the antenna pattern would look more like the one for ground