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Wow, I didn't expect that you could actually broadcast to your own pager!

And, um, yeah I'd recommend at least using that bandpass filter that was mentioned, to minimize the amount of EMI disruptions in your immediate vicinity. It'd be informative to know what other sorts of devices and services are using that range, in the US. Probably stuff like pacemakers and construction detonators, among other things (does anyone remember the warning signs not to use cell phones around construction sites where there's blasting?).