twocommunications
Two Communications
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twocommunications · 1 hour ago
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JA5BDZ Mobile Station
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twocommunications · 23 hours ago
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Project Diana, named for the Roman moon goddess Diana, was an experimental project of the US Army Signal Corps conducted on January 10, 1946 to bounce radar signals off the Moon and receive the reflected signals. This was the first experiment in radar astronomy and the first active attempt to probe another celestial body. It was the inspiration for later Earth–Moon–Earth communication (EME) techniques.
Although satellites have largely replaced this method, EME remains popular among amateur radio enthusiasts, particularly in the 144 MHz, 440 MHz, and 1.2 GHz bands.
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twocommunications · 2 days ago
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OH9FTW Mobile
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twocommunications · 3 days ago
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Marconi wireless school, New York. Operators copying messages transmitted from ships at sea. Circa 1912
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twocommunications · 4 days ago
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JA7WTC QTH. Fukushima, Japan
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twocommunications · 5 days ago
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Archduke Anton of Habsburg Amateur Radio Station. Austria, circa 1937.
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twocommunications · 6 days ago
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Radio Operator in his radio room at West Berlin. Germany 1950s
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twocommunications · 7 days ago
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Dr. J. Harris Rogers (1850–1929) of Hyattsville, MD, a pioneer in underground and underwater radio communication systems, is pictured with the loop antenna he recently used to receive signals from the Atlantic Ocean. Remarkably, this loop antenna was submerged during operation. Circa 1924
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twocommunications · 8 days ago
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The Collins 30S-1 Linear Amplifier
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twocommunications · 9 days ago
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The Dwingeloo Radio Observatory is a single-dish radio telescope near the village of Dwingeloo in the northeastern Netherlands.
Radio amateurs along with amateur and professional astronomers, use the telescope for projects, one being Earth–Moon–Earth communication, also known as moonbounce, which allows for people on different parts of Earth to communicate via the Moon.
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twocommunications · 10 days ago
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The Collins Discone Antenna at the Titan Missile Museum in Green Valley Arizona.
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twocommunications · 11 days ago
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The Korean Amateur Radio League (KARL) HL0HQ, Yongin, South Korea
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twocommunications · 12 days ago
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Radio Enthusiast testing equipment's reliability, range, and efficiency while demonstrating the potential of radio communication for emergency preparedness. Field Day 1928
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twocommunications · 13 days ago
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Radio Klub Nikola Tesla
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twocommunications · 14 days ago
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Heathkit SB-102 - HF Ham Radio Transceiver. Unlike most modern radios, the SB-102 was sold as a kit that required the owner to assemble it piece by piece. This wasn’t just a cost-saving measure; it was a deliberate way to teach amateur radio operators the inner workings of their equipment. The Heathkit SB-102 SSB/CW was introduced in 1970.
Heathkit's assembly manual was so detailed and beginner-friendly that even those with little electronics experience could successfully build the transceiver. Many hams credit their lifelong technical skills to building an SB-102, making it more than just a radio—it was an educational tool that inspired generations of operators to dive deep into the art and science of radio.
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twocommunications · 15 days ago
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ON3DMX Mobile/Portable
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twocommunications · 16 days ago
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Merry Christmas from our family to yours! May Peace and Joy fill the coming year. 🎄
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