or - - 85.65-74.95 m actual
: Best at night, with significant daytime signal absorption. Works best in winter, due to atmospheric noise from hemispheric thunder storms during summer. Only countries in the Americas and few others have access to all of this band; in other parts of the world amateurs are limited to the bottom 300 kHz (or less) (85.65-83.28 m).

: In the US and Canada the portion of the band from 3.600-4.000 MHz, regulation permits use of single-sideband voice as well as AM