Directional ex-Class IA AMs
Mon Nov 23 11:16:29 EST 2009
My dad worked for NBC-TV, and one of my earliest memories is of the "NBC
Picnic" held at the Port Washington site. Big building, brick, as I recall,
with a pond out front and a fountain - to cool the transmitter, of course,
but it looked neat and extravagant.
IIRC, there were two towers, oriented north-south. If that memory is
correct, they would probably have been reducing power to the south over the
ocean. Two-tower patterns are always symmetrical about the axis, so they
would have been putting as much power east as west if the towers were
aligned N-S. Maybe they were more like NW-SE, which would make more sense.
There's some more info in this article: http://jeff560.tripod.com/am4.html -
and a lot of early radio info, as well. Note in paragraph 15 the reference
to the joint WCBS/WNBC tower being demolished in an airplane accident in
1967, and WNBC's temporary move to the site in Lodi formerly used by WABC. I
don't recall that WABC ever left the Lodi site, but the article may refer to
the short aux tower on that site.
There's more on that site. It's worth a look:
WABC, WMAQ, and WGN are three stations that have roughly half-wave towers
with shorter aux towers on the property that I understand were used in the
early days to directionalize the signals a bit. All are "ND" today, and the
aux towers are available for standby use but mostly they just support STL
and other aux antennas.
From: "Dan.Strassberg" <email@example.com>
Sent: Monday, November 23, 2009 8:57 AM
To: "A. Joseph Ross" <firstname.lastname@example.org>
Cc: "Boston Radio Interest" <email@example.com>
Subject: Directional ex-Class IA AMs
More information about the Boston-Radio-Interest