Long Reply - They are not DA.
> It's very directional, I can assure you. They have to
> protect nearby 106.3's in Nasuua, NH and Greenfield, MA.
Negative.
The antenna system is a two bay Shively Labs 6813-2D non directional.
Here's are pictures from the internet of it, AND it is licensed non directional as well.
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From the FCC license:
WWKX RI WOONSOCKET USA
Licensee: CITADEL BROADCASTING COMPANY
Service Designation: FM 'Full Service' FM station or application
Channel/Class: 292A Frequency: 106.3 MHz Licensed
File No.: BLH-19921228KB Facility ID number: 65198
CDBS Application ID No.: 180232
41° 59' 43.00" N Latitude
71° 26' 54.00" W Longitude (NAD 27)
Polarization: Horizontal Vertical
Effective Radiated Power (ERP): 1.15 1.15 kW ERP
Antenna Height Above Average Terrain: 158. 158. meters HAAT
Antenna Height Above Mean Sea Level: 235. 235. meters AMSL
Antenna Height Above Ground Level: 76. 76. meters AGL
<u>Non-Directional</u> Antenna ID No.: - Pattern Rotation: 0.00
Antenna Make: - Antenna Model: -
No. of antenna sections: -
So I can ASSURE you with the technical background AND evidence to prove they are non directional. The only reason you can hear the signal as good as you can in Plymouth and as poorly in Worcester is simply put... terrain. Sometime look at the terrain between the Cumberland (Diamond Hill) transmitter site and Worcester. It's very hilly, including several that are near the height of the hills in Cumberland. Now look at the terrain between there and Plymouth and the shore line... it's basically flat aside from some minor hills...
With respect to 106.3 in Nashua, the protected contours of both stations don't come within 10 miles of one another (106.3 in Nashua's crosses just north of the I290 & I495 intersection, and 106.3 in Woonsocket's crosses near the intersection of I 90 and I495).
106.3 in Northampton (not Greenfield, BTW) is a much newer station and would be the one who has to protect the others. Stations all ready on the air do not need to protect new stations.
With that said:
A couple of years ago, WWKX applied to go to 2.2kW with a directional antenna, because at 2.2kW their power would be over the limit towards 106.3 Nashua.
(A class A 6kW versus the present class A 3kW as the other two 106.3 are).