October 4 marks the 61st anniversary of the launch by the Soviet Union of Sputnik 1, Earth’s first artificial satellite. The Soviets heralded the launch as a national triumph, and the space race between the USSR and the US began.
Sputnik 1 was a 58-centimeter diameter, polished aluminum sphere sprouting four antennas and transmitting a 1 W signal on 20.005 and 40.002 MHz, putting it within the range of nearly any radio amateur. Orbiting the planet about once every 96 minutes, Sputnik 1 could be seen from Earth. Following the launch, the US National Institute of Standards and Technology’s HF radio station WWV even halted its nighttime 20 MHz transmissions to avoid interfering with the satellite’s signal.
Scientists studying it gained information about such things as the density of the upper atmosphere, deduced from orbital drag. The propagation of its signals also helped to better understand the ionosphere. The US launched its first artificial Earth satellite, Explorer 1, on January 31, 1958.
AMSAT Vice-President of Operations, Drew Glasbrenner, KO4MA says that the camera on AO-92 is planned to be used to try to image Hurricane Florence dur... Read more
CHAMELEON ANTENNA EMCOMM-III Portable HF Antenna is specially designed for short to long range portable and man-pack HF communications. The EMCOMM III... Read more
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— Tomas / Amateur Radio Operator, NW7US ( http://NW7US.us ) – Twitter: https://Twitter.com/NW7US – Facebook: https://www.facebook.co... Read more
Programmable Screwdriver Antenna Controller 10 Memories. . . Super Accurate. . . AutoPark . . . StallProtector. . . Super bright LEDs Tuning your mobi... Read more
“Today i have received the new SDR receiver from SDRplay, the RSPdx and was eager to turn it on and do some tests receiving on HF and VLF. Altho... Read more
What can it do? SWR The Antuino measures the SWR of the antenna with a narrowly tuned receiver. A simpler resistive bridge with a diode detector will... Read more
Technical Specifications 1 MHz to 1000 MHz. Bandwidth 160 kHz. Modulation types AM, WFM, NFM, LSB, USB. Powered by one Li-ion cell. Consumption up to... Read more