Strange radio interference from the 1980s.

How’s this for a niche post? Yes, I’m looking at YOU, my dear readers, to help identify some interference we used to receive on local radio stations. Now now, that would be too easy. No, this is taken from an off-air recording I made in 1989.

I used to hear this a lot, and I used to tape off the radio a lot, but this is the only recording I know of, of this particular interference. Yes, I know, I’m not going to discover aliens eith this particular tape, and there’ll be a logical explanation, but I simply don’t have it.

My personal thoughts? It’s the hospital pager system. At the time, I lived a mere stone’s throw from the local hospital, and seeing as these recordings were made on a little Saisho twin cassette deck thing, it’s possible the aerial could have been pointing in that direction? The interference lasts almost exactly a second, and seems to ramp up in strength. All of the recordings have this same characteristic.

So… erm… any ideas?