Very low frequency (VLF) enthusiast Joe Craig, VO1NA, reports that Stefan Schaefer, DK7FC, copied his 50-character message transmitted from Newfoundland on 8.271 kHz, with a radiated power of 10 mW.
“This is a new record for amateur transatlantic VLF,” Craig told ARRL. “The mode used was EbNaut by Paul Nicholson. EbNaut is a synchronous coherent BPSK mode for use at VLF and low LF. Craig’s tower supports a VLF RL (rotated L) 10-meter (33 feet) average height and 100 meters (328 feet) long. VLF is the ITU designation for radio spectrum in the range of 3 – 30 kHz, corresponding to wavelengths from 100 to 10 kilometers, respectively.
“Since VLF waves can penetrate at least 40 meters (131 feet) into saltwater, they are used for military communication with submarines,” Craig noted.
InnovAntennas An Excellent Dual Band Yagi for 70/144MHz on a 2.4m boom and single feed point The 4-2-12 Dual Band Yagi has a total of 12 elements, 5 e... Read more
EFHW-8010™ Multiband End Fed Half Wave Antenna 130 Feet (39.6m) long NO TUNER needed! Perfect for ALE HFLink, ARES, EMCOM … Resonant on 80/40/30/20/17... Read more
JH1CBX Masaco introduces AH-705 designed for IC-705. Descriptions ・Covers the 1.8 MHz to 50 MHz bands 30 m, 98.4 ft or longer antenna: 1.8 – 54 MHz, 7... Read more
Icom’s new PoC (Push-to-Talk Over Cellular) radio system allows you to communicate with your two-way radio system over a 4G / LTE closed network. Now... Read more
Gaspar, EA6AMM José Francisco de Almeida, CT4AN, IARUMS Coordinator from REP (Rede dos Emissores Portugueses; Portugal), info... Read more
Tonga Volcano An update on the situation coming out of Tonga. A very large volcano has erupted disrupting satellite, communications and telephone netw... Read more
HamCation A large ARRL team of member-volunteers, program representatives, and presenters will advance the convention theme inviting attendees to “reD... Read more
The FCC has established April 14, 2022, as the date by which amateur radio transmissions must stop in the upper 3.45 – 3.5 GHz segment of the amateur... Read more