What I'm trying to figure out is, for some reason, my VX-2 is totally deaf on the UHF frequencies I'm trying to listen to!
Interesting, the specification in the manual omits this part of the coverage:
1uV TYP for 12 dB SINAD (174-222 MHz, WFM)
.5 uV for 12 dB SINAD (300-350 MHz, NFM)
I hooked my VX-2 to a signal generator and to open the squelch at 276.150MHz required -39dBm, or 2.51 millivolts. So no huge surprise you're not hearing anything.