At least four television stations have petitioned the FCC to reassign their digital broadcasts from a VHF channel (2 through 13) to a UHF channel (14 through 51). (Note that UHF channels used to go up to channel 83, but the frequencies for channels 52 to 83 were auctioned off as part of the transition [...]
[url=http://www.hdtvmagazine.com/columns/2009/08/hdtv_almanac_vhf_to_uhf_moving_on_up.php]Read Column[/url]

