> Understood. Then if the "new" 97.5 pattern is to be sooooooo
> "directional" then what kind of pattern will it actually
> have? Sounds overly complex to me...but then again I'm not
> an engineer.
JerseyShor got it backwards. The new 97.5 will actually be directional towards WALK, not away from it. The nulls are to the west to protect WRVV, and to the southeast to protect WIXM.
The WJJZ comparison still holds though. If the only thing stopping you from hearing WJJZ clearly on 106.1 is the 105.9 interference, you should have no problem hearing 97.5. Of course, the real question is whether you'll want to hear it, because Classic Rock probably won't stick around.
One of the interesting things about this move is that the new 97.5 will have better coverage into Central Jersey than any of the other Philadelphia stations, because it won't have ANY on or adjacent channel interference in between WALK and WIXM's coverage area. Every other Philly station has to deal with a New York station either on the same frequency (100.3, 101.1) or on an adjacent frequency (92.5, 93.3, 94.1, etc.).