Category: HF

Via the ARRL: FCC Extends Waiver Permitting Use of PACTOR 4 for Hurricane Relief Efforts

The FCC has extended by 1 week an emergency waiver request from ARRL to permit radio amateurs actively engaged in Hurricane Dorian response and relief efforts to use the PACTOR 4 digital protocol on HF. “We conclude that granting the requested waiver is in the public interest,” the FCC said in an Order released September 6. “Hurricane […]

Via the ARRL: ARRL HF Band Planning Committee Reactivated to Address Spectrum Issues

In an effort to more effectively address HF digital technology issues, ARRL President Rick Roderick, K5UR, has reactivated the ARRL Board of Directors’ HF Band Planning Committee. The six-member panel, chaired by First Vice President Greg Widin, K0GW, will primarily focus on spectrum allocation issues that have gained increased visibility with discussions on accommodating automatically […]

WWV Centennial Committee Prepares for Trial Run of WW0WWV Special Event

The WWV Centennial Committee reports that it will conduct a trial run of special event station WW0WWV over the August 24 – 25 weekend. Radios and antennas began arriving last week, and a tower and beam will be erected, along with several vertical antennas. WW0WWV will be set up adjacent to the WWV transmitter site in Fort […]

via the ARRL: Major WSJT-X Upgrade Boosts FT4 into “a Finished Protocol for HF Contesting”

The WSJT Development Group has announced the “general availability” release of WSJT-X version 2.1.0. This major upgrade formally introduces FT4 as a finished protocol for HF contesting. WSJT-X version 2.1.0 supplants any “release candidate” (beta) versions, and users should discontinue using any beta versions of the software. The latest edition of the popular digital software suite also includes improvements and bug […]

via the ARRL: Report: California Earthquakes Disrupted HF Propagation on West Coast

British Columbia radio amateur Alex Schwarz, VE7DXW, said that an Independence Day magnitude 6.4 earthquake in California’s Mojave Desert and multiple aftershocks negatively affected HF propagation on the US west coast. Schwarz, who maintains the “RF Seismograph” and has drawn a correlation between earthquake activity and HF band conditions, said the radio disruption began at around […]

via the ARRL: Over-the-Horizon Radars Continue to Plague Amateur Bands

The International Amateur Radio Union Region 1 Monitoring System (IARUMS) reports a “new kind” of over-the-horizon (OTH) radar on 20 meters. The intruding signal, which appears to be emanating from the Far East, was monitored during May on 14.140 – 14.150 MHz. Another Chinese wideband OTH radar has been showing up on 15 meters, with a signal […]

via HACKADAY: Radio Piracy on the High Seas: Commercial Demand for Taboo Music

The true story of pirate radio is a complicated fight over the airwaves. Maybe you have a picture in your mind of some kid in his mom’s basement playing records, but the pirate stations we are thinking about — Radio Caroline and Radio Northsea International — were major business operations. They were perfectly ordinary radio […]

via the ARRL: HAARP Gearing Up for its Spring Research Campaign

Alaska’s High-Frequency Active Auroral Research Program (HAARP) is prepping for its spring research program. The activity will run March 25 – 29. The high-power HF transmitter and huge antenna array located near Gakona, Alaska, now is operated by the University of Alaska Fairbanks (UAF). HAARP Chief Scientist Chris Fallen, KL3WX, said investigations will range from […]

via the ARRL: WWV Centennial Special Event Will Use WW0WWV

With its funding secure for another year, WWV, the world’s oldest continuously operating radio station, will have extra reason to celebrate its centennial this fall. The National Institute of Standards and Technology (NIST) and the Northern Colorado Amateur Radio Club (NCARC) have teamed up to organize 100th anniversary events. A memorandum of understanding is pending. […]

via the ARRL: VE7DXW’s “RF Seismograph” May Be Real Seismograph

Alex Schwarz, VE7DXW, in British Columbia, Canada, is exploring the possibility that “RF signatures” detected by the RF Seismograph propagation tool could also be indicating earthquakes, and may even be able to predict them shortly before they occur. A real-time HF propagation-monitoring tool developed by Schwarz and the MDSR team, the RF Seismograph shows both band noise and activity or […]

via the ARRL: Russian “Sunflower” Coastal Radar Showing Up on 60, 40, and 75 Meters

The January issue of the IARU Region 1 Monitoring System (IARUMS) newsletter reports the Russian “Sunflower” coastal radar, located east of Vladivostok, is being heard at nights on 3,716 kHz and 6,860 – 7,005 kHz, as well as on several 60-meter frequencies. A Chinese wideband over-the-horizon (OTH) radar also appeared on 7.000 MHz in early January. While 60 […]

via the ARRL: Over-the-Horizon Radar Reported on 15 Meters

The International Amateur Radio Union Region 1 (IARU-R1) Monitoring System (IARUMS) reports that an over-the-horizon (OTH) radar located on Cyprus has been active on 21.170 MHz, which is inside an exclusive Amateur Radio allocation. “The Sovereign Base areas of Akrotiri and Dhekelia is a British Overseas Territory on the island of Cyprus,” IARUMS Coordinator Wolf […]

via the ARRL: India Gains Three New Bands, Sweden Gets Permanent 60-Meter Access

Radio amateurs in India now have access to three new bands. India’s Ministry of Communications’ Department of Telecommunications has published an updated National Frequency Allocation Plan, effective October 25, which lists the new bands at 5 MHz (60 meters), 472 kHz (630 meters), and 136 kHz (2300 meters). All allocations are on a secondary basis. On […]

via the ARRL: Maritime Mobile Service Network Operators Assist Vessel with Ill Crew Member

Amateur Radio operators associated with the Maritime Mobile Service Network (MMSN) played a significant part in summoning medical assistance on November 9 for a crew member suffering chest pains on board the 48-foot sailing vessel Marie Elena, some 300 miles east of Bermuda. “The assistance we received from the ham radio operator[s] was crucial in helping […]

via the ARRL: Storm Takes Down Antennas at Memorial Ham Station on Swedish-Norwegian Border

The SJ9WL-LG5LG Morokulien memorial station on the border of Sweden and Norway is off the air after a large tree, brought down during a severe storm on August 10, caused extensive damage to the station’s antennas. According to one report, the station’s 100-foot tower was broken into pieces after the tree fell across three tower guys. That pulled […]

via the ARRL: Sweden’s SAQ Announces Annual Alexanderson Day VLF Transmission on July 1

Sweden’s World Heritage Grimeton Radio Station SAQ Alexanderson alternator will be on the air on July 1 on 17.2 kHz for its annual Alexanderson Day transmission. Three transmissions are scheduled: Startup/tuning at 0815 UTC, message transmission at 0845 UTC; startup/tuning at 1015 UTC, message transmission at 1045 UTC, and startup/tuning at 1215 UTC, message transmission at 1245 UTC. All […]

via the ARRL: Experiments Look to Leverage Low-Latency HF to Shave Microseconds off Trade Times

Experimental operations now under way on HF appear aimed at leveraging low-latency HF propagation to shave microseconds from futures market trades and gain a competitive edge in a field where millionths of a second can mean winning or losing. Bloomberg on June 18 reported on a secretive antenna facility near Maple Park, in Kane County, Illinois, and speculated that […]