LF = 30 - 300 kHz.
MF = 300 - 3000 kHz. / 3 MHz.
HF = 3 - 30 MHz.
VHF = 30 - 300 MHz.
UHF = 300 - 3000 MHz / 3 GHz.

and so on. Most everything from 30 MHz. on down will bounce off somewhere in
the sky at some point in time, not always perfectly predictable when and where.

Jim



- This is true for the VHF frequencies used for conventional aircraft com
- communications (118-136 MHz). HF frequencies (below around 5 MHz)
-bounce
Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com