I understood from a chum that the original acceptance of increasing the ECAC Band II FM broadcasting spectrum was conditional upon there being a cheap method of ensuring that the aviation community would not suffer from expensive re-equipment requirements. Simple in-line filtering or something to that effect.
I'm at a bit of a loss to understand why, with normal CD, satellite radio, internet broadcasting, multiplexed digital FM, MP3, and now even satellite car radio being demo'd in the US we need more spectrum space for conventional Band II FM at all.
Blue Line - any comments to add?