W9DC IOTA Awards
- W9DC North America Amateur Radio checkpoint for IOTA Islands on the Air and WLH World Lighthouse award applications and award instructions; Island and lighthouse award links for international radio operator activities
W9DC IOTA and lighthouse awards
- W9dc north america amateur radio checkpoint for iota islands on the air and wlh world lighthouse award applications and award instructions
Greek Lighthouse Award
- Greek Lighthouse Award has been instituted by the Northern Greece Contest Team and will be issued to any Ham Radio operator or SWL for QSOs with (or reports from) amateur radio stations operating from Greek's lighthouses.
San Angelo Amateur Radio Club
- Amateur radio club serving the Concho Valley of West Texas for over 70 years providing public service and SKYWARN severe weather spotting service to the National Weather Service.
6 Meters and Up: SSB/CW DX
- This is a group for amateur radio operators interested in VHF and UHF SSB and CW, primarily in North America. It's intended for general discussions of V/UHF operation, beacon information, reports of tropo and Es openings and anything else of interest to V/UHF DX enthusiasts
Near-Real-Time F2-Layer Critical Frequency Map
- This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space.
The map shows the radio auroral zones as green bands near the northern and southern poles.
Asian broadcasting institute
- ABI is a nonprofit organization established in 1979 to research and analyze broadcasting in Japan, South and North Korea, China, Hongkong, Taiwan, Macao and Mongolia in addition to international service around the world in languages used in those countries and regions.