The nearly 46-year-old AO-7 amateur satellite made a remarkable contact possible on May 4 between Diego Feil, LW2DAF, in Buenos Aires, Argentina (GF05rk), and Tom Ambrose, ZS1TA, in Cape Town, South Africa (JF95fx). The contact spanned 4,329 miles across the South Atlantic, with both stations aiming at only 2 or 3 degrees above the horizon.
Both stations had been watching orbital predictions for several weeks, and times when both stations could “see” AO-7 at the same time occurred only occasionally. Electrical noise, particularly in Cape Town, had hampered earlier efforts, but on the morning of May 4, noise levels were low, and a perfect contact was possible with full call signs and reports exchanged.
In 2016, Dave Swanson, KG5CCI, in Arkansas, and Eduardo Erlemann, PY2RN, in Brazil, achieved a distance milestone on AO-7, completing a scheduled contact that covered a calculated distance of approximately 4,979.2 miles, which Swanson said was “way beyond the theoretical range of AO-7” and a feat that “the math said shouldn’t be possible.” — Thanks to AMSAT News Service
Alpha Ez-Military Antenna, a complete 1KW PEP system for Military, Emergency Services, or restricted use environments. The 1KW Ez-Military system is a... Read more
Full 20m, 15m and 10m Band Coverage (with Feed Point Mounted ATU) Under 8 Feet Tall! No Radials! Force 12’s Sigma Series Verticals are contest a... Read more
“YOTA 2018 South Africa is now over, and one of the highlights of the youngsters’ week were the kit building sessions. They had the opport... Read more
Measure length of coax, etc. with your scope, a battery and a resistor – simple TDR Read more
Spy Radio & Indoor Antennas – If they can do it, so can you! Read more
Here’s the review of the Alpha Antennas Magnetic Loop. Stay Tuned for the big 3 way shootout with the Chameleon P Loop & the Alexloop. I... Read more
The new FTM-300DR provides stable and reliable 50W RF power output. As in recent YAESU mobile transceivers, the FTM-300DR is also equipped with a... Read more
Image credit: Otava Tuomi. Early last year, when the outbreak of coronavirus (COVID-19) first pushed much of the world into lockdown, one traditional... Read more
A 5-year, $9.3 million National Science Foundation (NSF) grant will allow the University of Alaska Fairbanks (UAF) Geophysical Institute to establish... Read more
Donald de Riggs, J88CD, on the Caribbean island of St. Vincent, says that on April 13, the 42nd anniversary of the 1979 eruption of the La Soufriere v... Read more