Category: HF

via the ARRL: Mysterious Signals Did Not Come from Missing Submarine; MF/HF Frequencies Listed

Satellite signals heard over the weekend did not come from a missing Argentine Navy submarine San Juan that went missing on November 15, dashing hopes that the vessel could be located. The submarine had reported a malfunction, had surfaced, and was headed back to its base when the Navy lost contact with it. The sub, built in […]

via the ARRL: Simple 40-Meter Dipole Supports Advanced Mars Radar

The venerable HF dipole has found a new home and purpose in space. The Mars advanced radar for subsurface and ionospheric sounding (MARSIS) on Mars Express uses a simple 40-meter dipole as the antenna for its subsurface sounding radar. The dual-channel low-frequency sounder operates between 1.3 and 5.5 MHz for subsurface sounding and between 100 […]

via the ARRL: Amateur Radio Facilitates Another Patient Evacuation on Puerto Rico

“Force of 50” volunteer Val Hotzfeld, NV9L, reported from Puerto Rico today (October 15) that Amateur Radio volunteers on Culebra and in Fajardo — Jeremy Dougherty, NS0S, and Matthey Gonter, AC4MG — made it possible for physicians at the two locations to communicate directly in an effort to evacuate a patient who is an amputee. […]

ARRL Reminds Amateurs to Keep Clear of Frequencies Designated for Puerto Rico-Caribbean Emergency Response

ARRL reminds Amateur Radio operators that emergency communications are taking place on and around 14.265, as well as other frequencies. Please avoid these frequencies whenever possible, to allow for emergency communications to transpire clearly and efficiently. If you must be on the air in the vicinity of these frequencies, please allow emergency operators at least […]

via the ARRL: Amateur Radio Volunteers Aiding Storm-Ravaged Puerto Rico, US Virgin Islands

Puerto Rico and the US Virgin Islands both suffered substantial damage from Hurricane Maria, although Puerto Rico took the bigger hit, and it is there that Amateur Radio has begun to fill a huge telecommunications gap. According to the FCC, service is out for 96% of the cellular telephone sites in Puerto Rico — and […]

via the ARRL: SSB Sprint Postponed

The North American SSB Sprint Contest, originally scheduled for October 1 (Saturday, September 30, in US time zones), has been postponed, and will be rescheduled for a later date this fall. “Our thoughts and wishes for an effective and orderly recovery from the recent weather events in the Caribbean and southern US, and the earthquake activity […]

via the ARRL: Caribbean Situation Critical, Clear Frequencies Essential

The Caribbean Emergency and Weather Net (CEWN) again is requesting that radio amateurs not involved in the ongoing post-hurricane relief and recovery efforts via Amateur Radio to avoid operating on or near the net’s frequencies — 7.188 and 3.815 MHz. The net is handling critical traffic, primarily for Dominica and needs interference-free channels. “We’ve been […]

via the ARRL: SATERN Seeks Volunteers to Serve as Net Control or Relay Stations

The Salvation Army Team Emergency Radio Network (SATERN) International SSB Net is seeking volunteers who can serve either as net control stations (NCS) or as relay stations. SATERN has been in daily operation (1400 UTC until at least 2300 UTC) since Tuesday, September 19 on 14.265 MHz (Note: SATERN shifted to 14.275 MHz on September […]

Not All “Intruders” on Ham Bands are Illegal — But a Lot of Them Are

The monthly newsletter of the International Amateur Radio Union Region 1 Monitoring Service (IARUMS) typically makes for some interesting reading. While the reports that come from more than two dozen contributors in Europe and Africa can be a bit visually dense, the content conveys the impression that that there are myriad intruders on the Amateur […]

via the ARRL: Emergency Net Activated in Wake of Earthquake in Mexico

The National Emergency Net of the FMRE — Mexico’s national Amateur Radio association, has activated on 7.060 MHz (the Net also may operate on 3.690 MHz) to handle any emergency traffic after a late evening earthquake occurred off Mexico’s coast. Radio amateurs not involved in the earthquake disaster should avoid those frequencies. The potent magnitude 8.2 earthquake […]

via the RSGB: Keep hurricane frequencies clear

Hurricane Irma is getting widespread news coverage and will affect many countries in the Caribbean. There are the usual American nets on 14.265 and 14.325MHz to gather information on the storm. Several other frequencies will be used and amateurs in IARU Region 1 are asked to please take steps to avoid interference with emergency operations. […]

via the ARRL: Operating Procedures During Hurricane Irma

Please be aware that due to the breadth of this series of weather events, numerous emergency and public service nets are in session, especially on the 80, 40, and 20 meter bands. US licensees are reminded that Part 97.101 (c) always gives priority to stations providing emergency communications. All stations should be aware that in […]

via the ARRL: FEMA Announces Regions that Could Activate on 60-Meters for Hurricane Irma

The below listed Federal Emergency Management Agency (FEMA) Regions, including call signs, could be activating the 5 MHz/60-meter band frequencies in support of a possible response to Hurricane Irma on September 5. Region 1 — KF1EMA Region 2 — KF2EMA (includes Puerto Rico and US Virgin Islands) Region 3 — KF3EMA Region 4 — KF4EMA […]

More Professional and Citizen Research Suggests Eclipse Briefly Affected HF Propagation

Both professional and citizen scientists conducted formal and informal investigations into the effect of the August 21 solar eclipse on HF radio propagation. Nathaniel Frissell, W2NAF, of HamSCI, has said it will take some time to get a more scientific analysis of data compiled during the Solar Eclipse QSO Party. Frissell and others are investigating […]

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