WBZ Reception

[Dale H. Cook]

At 02:56 PM 10/19/2016, Kevin Vahey wrote:

>The other 50 KW clear that roared into Chicago was WWL 870 New Orleans for the same reason WBZ did - directional by choice not mandate.

Neither WBZ nor WWL gets an immense power gain in the major lobe from their directional patterns, which are cardioids. WBZ gains to the north, west and east because its parameters are close to 90 degree spacing, close to 90 degree phase angle, and unity ratio, yielding a single null to the east (very close to the classic simplest cardiod). WWL gains to east and west, maximizing coverage along the Gulf coast, with two nulls and a minor lobe to the south. WBZ has significantly higher power gain towards Chicago than WWL.. In both cases one primary reason for the choice of a directional antenna system is that fish have neither diaries nor people meters.

Dale H. Cook, Radio Contract Engineer, Roanoke/Lynchburg, VA
http://plymouthcolony.net/starcityeng/index.html