Some can explicitly (I had a 1981 Technics receiver with such a switch on the back), and some may have it as an undocumented feature. But who all is going to put up with hacking their radio to make it work? AM has enough listenership issues already.klutch00 said:Actually can't some digital tuners be reprogrammed to accommodate 9 kHz intervals? I know that my old Kenwood car stereo could do that and oddly enough, the factory radio in my 1987 Dodge Shadow could also. I remember when I first got the car that I somehow reprogrammed it to do that and for the life of me, I can't figure out how it happened; neither did the dealer.jabba17 said:You've just rendered most digital AM tuners obsolete with such a move. IMO that would be a bridge too far.klutch00 said:Consider reallocating the AM assignments from 10 kHz intervals to nine.
The reduction of fidelity that is the NRSC standard was necessary due to the interference of strong signals on adjacent channels... reducing separation to 9 kHz just makes the band sound worse.
I'm sure there can be quality analog transmission standards implemented which can be used in a narrow transmission spectrum. Outside of North and South America, nine-kilohertz interval is the standard for AM and it hasn't gone the way of the dinosaur in those regions.
I wonder how many FM digital tuners can be hacked to go down to 78MHz, like they use in Japan, for potential FM x-band usage?