[BC] FCC Info On Directional Arrays

[PeterH]

On Oct 14, 2009, at 11:18 AM, Thomas Dimeo wrote:

> Is there an FCC website where I can find information on
> stations with directional arrays?  I'm interested in finding
> information on WKVA 920 such as the bearing of the three
> towers and base current of each tower.  It's only a curiosity
> since I worked there in the mid sixties and don't remember
> much about the station.

http://www.fccinfo.com/CMDProEngine.php? 
sCurrentService=AM&tabSearchType=Appl&sAppIDNumber=305642&sHours=N

138 degree bearing, 90 degree spacing, 90 degree height.

Only 307.25 mV/m/kW at 1 km RMS efficiency, lower than one would  
expect for 90 degree height.

The same pattern shape and a much higher efficiency, about 352 mV/m/ 
kW at 1 km RMS efficiency, could be obtained with 125 degree spacing  
and the same 90 degree height.

See KGO, for an example of this alternate technique, which is  
sometimes called "squishing".

http://www.fccinfo.com/CMDProEngine.php? 
sCurrentService=AM&tabSearchType=Appl&sAppIDNumber=249372&sHours=U