Could a forth band be introduced for commercial use?

[RadioPhillyFan]

There's Shortwave, Longwave and Pulse and Linear Modulation. Could any of them be used for another band? All the frequencies moving to FM is jamming new start-ups and the Class B's allocations are all entirely gone.

Couldn't Pulse Modulation be used? (it's basically Frequency Modulation)

I have no doubt a new band won't be introduced with a new tecnology eventually.

Keep in mind, topic is for fun. I've always wanted to run my own Radio Station, having only DJ'd in college.

 

[Kent T]

I would like to see Long Wave used as a AM style broadcast band as regional channels. Also, for non HD radio stations, why not legalize SCA use for the public?

 

[KeithE4]

I would like to see Long Wave used as a AM style broadcast band as regional channels. Also, for non HD radio stations, why not legalize SCA use for the public?

There has never been a long-wave broadcast service in the Western Hemisphere, and there won't be one in the future. Few, if any receivers in the hands of the (non-ham/SWL) general public, power requirements are too high, efficient antennas are too large (1/4 wavelength is 936 feet at 250 kHz, and the radials would be of equal length), and the land that they'd sit on is too valuable to be used for a radio service that almost nobody would listen to. Nobody in their right mind would bother with LW. Copper thieves would have a field day, though.

And, as far as SCA is concerned, how many people have SCA decoders in their radios?