I don't think KPLU had to run over to 105.5 in Skagit County because of any interference from Canada. When I"ve driven thru there in the past, I always was impressed by how well that 91.1 translator carried a strong, clear signal for quite a distance. Could even hear it in the car pretty strongly well south of its contour, in Lynnwod, but it disappeared quickly south of Edmonds.
Instead, a new religious station signed on Thursday from Port Townsend on 91.1, with higher wattage than anything else I've heard pop up on the Peninsula in the past couple of years. Comes in loud and clear in N. King County. I forget the "Voice of Hope"' call letters, but it sounds like the 7th Day Aedventist version of Harold Camping's dry-as-the-dust-ye-shall-soon-become style of religious radio. Just what the public has been clamoring for more of.
How did they persuade the FCC to let them construct a relatively powerful signal on a first adjacent to Victoria's 100kw (or equivalent) commercial top-40 station on 91.3, which can't be more than 30 miles away from them, across salt water? On top of that, I'm now getting a lot more fuzz on 90.9 from Tacoma and 91.3 from Bellevue than was ever there before Thursday, and I live off 200th St N in Shoreline, thanks to the new 91.1 signal.
How did these guys squeeze in a full power signal on a first adjacent to a class A such a short distance away, when no one else was allowed to before? It's even closer than the 100.3/100.5 deal between Victoria and Vancouver. And a lot more wattage than the new LPFM's in Sequim and Pt Townsend (who are likewise first adjacents to biggies in Victoria).