[time-nuts] What are these towers?
dave.martindale at gmail.com
Fri May 20 22:34:28 UTC 2011
There is a similar array of 8 towers on the southern shore of Lake
Ontario, at 43° 12' 50" N 79° 36' 30" W. I used to drive past it
frequently when I lived in that area. I once found an article
describing the design of that particular array. It is apparently the
antenna for a powerful AM broadcast station that serves the Toronto
area, but is on the same frequency as a much lower-power station in
Rochester NY. The array is designed to send as much power as possible
towards Toronto, in a direction that is basically broadside to the
long axis of the array, while having a deep null aimed towards
Apparently, about 2/3 of the transmit power is fed to just one of the
eight towers, and most of the remainder goes to a couple more. So the
majority of the towers are there for nothing more than creating and
aiming the null in the pattern.
On Fri, May 20, 2011 at 3:14 PM, WB6BNQ <wb6bnq at cox.net> wrote:
> It looks like a directional array for an AM broadcast station. Directional arrays of this sort are used to protect other AM broadcast
> station's primary service areas (i.e., reduce interference to).
> The number of towers is determined by the directions that require the reduced signal levels. Also it may be that the towers are
> re-arranged from "Daytime" to "Nighttime" as well as power changes that may be required of the transmitting station.
> Jason Rabel wrote:
>> I was just browsing around on Google Earth and came across this cluster of transmission towers... Anyone care to take a guess what
>> they are for?
>> Television, radio, navigation... or something else? Looks like 11 towers...
>> 29° 59' 34N, 95° 28' 24W
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