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« on: October 29, 2012, 1321 UTC »
#1 is definitely pager signals. If you're hearing them on 124.350, then you either have a nearby paging transmitter that is bleeding over onto the air band or a receiver which is being overloaded by that same nearby transmitter.
#2 not sure about, but could be just about any electronic device sending out unwanted signals. I have heard something similar before which I later identified as a signal sent out over the cable TV cables so they could identify leaks by DF'ing it. However, I believe that I always heard it somewhere on 108 MHZ. If you drive around your neighborhood and keep hearing it everywhere you go, chances are good that's what it is. If you hear it very strongly on an FM receiver while holding it next to cable TV cable, then that's definitely what it is.
#3 I have no idea.