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 groundwave.
Below is a link showing the complete 0.15 mV/m groundwave contour of WFAN,
to
Perhaps FCC models don't take account of 'sea gain?' ITU models do, as I
recall.
Bill Whitacre
Alexandria, VA
---
On Feb 13, 2015, at 7:43 AM, Richard Fry r...@adams.net wrote:
From my reading of posts on many ham boards, the prevailing thoughts are
that the nighttime skywave field
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 on a beach (including the quotation marks).
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/beveragenotes.html
On Fri, 13 Feb 2015 10:35:28 -0500, Bill Whitacre b...@his.com wrote:
Perhaps FCC
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 along the surface of this island on the ENE radials
reaching the sea water of Long Island
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. Ocean QTH - response summary (long)
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
at best.
Lower angle skip, such as WFAN being received in Europe, Africa, Caribbean,
etc.
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 slopes
upward to touch the first branches 40' away. With that, I worked one
of the Caribbean stations
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 as on frequency, radiated
power, path length, and atmospheric conditions.
The plot linked below
