[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: WGY's relatively poor signal
Thr soil conductivity in the Adirondacks, the Catskills,
Long Island, and most of New England is terrible, but
the conductivity in the Hudson and Mohawk Valleys is
quite good. And portions of western New York where the
terrain is not mountainous have very good soil
I don't consider WGY's signal to be relatively poor.
It's consistent with the soil conductivity around the TX
site, which isn't bad (between 4 and 8 milliSiemens/m,
if memory serves). In eastern Mass, the conductivity is
generally between 1 and 2 mS/m, with the better values
found near the coast. In northwestern CT and Long Island
(particularly near the south shore), the number is
around 0.5. According to the soil-conductivity map,
that's about as bad as it gets anywhere.
In North Dakota and in the Los Angeles Basin, on the
other hand, values between 30 and 40 mS/m are common.
The official value for salt water is 5 S/m--more than
100 times as good as the best values on land and more
2000 times the values on land around Boston. Hence the
huge advantage in sites that allow the signal to reach
populous areas via a salt-water path. The stations
located near Wellington Circle have this advantage on
the South Shore and Cape Cod. Same for WROL, WLYN, and
WESX. Even though WRKO is well inland, it enjoys a
similar advantage because its high power, low dial
position, and favorable directional pattern keep its
signal quite strong all the way to the water's edge,
where the salt water takes over. WBZ, WJDA, and WMKI
have such an advantage on the North Shore.
> Reason: poor ground conductivity. There are maps of the US indicating ground
> conductivity. Stations like the "mighty KOMA of Oklahoma" and KVOO Tulsa
> belt their signals all the way to the DATELINE. KOMA drowns out the Pacific
> Northwest signals in the mid-Pacific. KFBK Sacramento is in an especially
> good conductivity zone and has REGULAR listeners in Alaska and the Aleutians.
> It can also be picked up in Polynesia, but its signal to the south and east
> is diminished by Baja. East Coast stations are in very poor ground
> conductivity zones and the inability to throw the signal out is the result.