Study: Rapid Development of Satellite Mega-Constellations Risks Tragedies of the Commons
A study reported in Nature, “Satellite mega-constellations create risks in Low Earth Orbit, the atmosphere and on Earth,” in Scientific Reports (May 2021) by Aaron C. Boley and Michael Byers, says the rapid development of mega-constellations risks multiple tragedies of the commons. That could include tragedies to ground-based astronomy, Earth orbit, and Earth’s upper atmosphere. The study asser...
RadioAnnunci.it Mercatino Radioamatoriale
Italian Mercatino Radioamatoriale by RadioAnnunci.it a regional classified ads for radioamatori
Which part of a dipole radiates most?
Antennas/Theory
The title may seem a strange question. Still, it is often said that the part where the current is largest, radiates most. And from that a rule of thumb follows, saying that if you don't have enough space to hang a complete half-wave wire dipole then try to make the central part hang as freely as possible.
Former ARRL Eastern Pennsylvania SM, Traffic Handler Joe Ames, W3JY, SK
Former ARRL Eastern Pennsylvania Section Manager Joseph A. “Joe” Ames, W3JY, of Paoli, Pennsylvania, died on March 5. An ARRL Life Member, he was 57. Ames served as EPA SM from 2014 until 2016. He was one of the founders of Radio Relay International, an independent traffic-handling organization. A ham since 1977, Ames devoted many years to amateur radio public service organizations including Del...
Northern Utah WebSDR USA
Internet and Radio/WebSDR
This online WebSDR is located near Corinne, Utah, has coverage on all U.S. amateur HF, MF and LF bands, 2 meters, the bottom 1 MHz of 6 meters, and several shortwave broadcast bands.
UR5WT WebSDR on 80m
Internet and Radio/WebSDR
This WEBSDR runs on Raspberry PI4-8G, Afedri-Net RX for 160m, RTL-SDR stick with homemade SBL1 mixer upconverter and fullsize 160m Delta loop antenna 4m up. Operated from Ukraine by UR5WT, US5WE and UX5DH,
DK0TE KiwiSDR Germany
Internet and Radio/WebSDR
Online internet HF LW MF web receiver based in Baden-Wuerttemberg cooperative state university Ravensburg Campus Friedrichshafen running a T2FD antennan under roof.
SR4DON Web Radio Receiver
Internet and Radio/WebSDR
OpenWebRX online radio receiver from Olsztyn Poland 10-15 meters bands, 50 MHz VHF UHF bands.
Build this Vertical Portable HF Antenna
Antennas/Portable
An experimental prototype of an asymmetrical hatted vertical dipole antenna that can work on HF bands 20 to 10 meters band. The AHVD Vertical dipole is an upside-down T design
Emergency communications for beginners and amateur-radio-study-class
Amateur (Ham) Radio Study Class — Come and learn the exciting world of Amateur Radio
Ofcom guidance under new telecoms security framework
Ofcom is today consulting on new guidance for telecoms providers, following the introduction of the Telecommunications (Security) Act 2021
Russian troops using insecure communications
Yahoo reports Russian troops invading Ukraine used Era cryptophones which require a 3G/4G phone service but as they'd destroyed the 3G masts they switched to insecure communications
Updates for DX and DXers
The following are four opportunities to learn more about what is happening in amateur radio DX and contesting
The Importance of Antenna Height
We all know that the height of an antenna is important, but we may not know how important and all the reasons and benefits it can bring. Also there are some points to watch as well, as the antenna rises higher above the ground
Axiom Private Astronaut Mission Crew Will Conduct ARISS School Contacts
Pirate QSL Collection
DX Resources/QSLing/QSL Galleries
A QSL Cards collection divided into North American Shortwave Pirate Radio QSLs abd European Shortwave Pirate Radio QSLs
NASA rocket plunges into mysterious pulsating auroras
Over the weekend, NASA launched a rocket from Alaska into an expanse of mysterious pulsating auroras
RSGB Legacy Committee to fund 50 MHz meteor scatter beacon
The RSGB has announced the Legacy Committee has agreed to fund a 50 MHz beacon specifically to study meteor events above the UK
The RSGB has released the Board proceedings PDF for the meeting held on January 15, 2022
They note that in 2021 the numbers taking the RSGB amateur radio exams were...
A variable capacitor for not a lot
There’s one component which used to be ubiquitous in every experimenter’s junk box, but nowadays unless you happen to be a radio amateur the chances are you may not have seen one in a long time, if ever
Radio hobbyists and war in Ukraine
In this video radio amateur Carl Plant M0SZT looks at the role being played by radio hobbyists during the invasion of Ukraine
World's oldest radio amateur
ARRL reports a Barbados ham is among the world's oldest, if not the oldest. Winston A. "Woody" Richardson, 8P6CC (ex-VP6WR), has turned 107 years old, placing him among the world's oldest radio amateurs
Emergency ham radio communications hub installed in seniors facility
Advocate News reports the Redwood Coast Seniors facility in Fort Bragg now has both an amateur radio station and an amateur radio repeater covering the North Coast Area
Ukraine: Newspaper interviews UK radio amateur
The Harborough Mail newspaper interviewed radio amateur Peter Rivers G4XEX about the situation in Ukraine
Why the 404 and how you make a difference
Last night I sent out a message about the Home Brew opportunities at the Expo. Here is the message link
Spy Numbers Stations
Shortwave Radio/Numbers stations
Spy Numbers Stations are shortwave radio stations that are speculated to have been broadcasting since World War I. The true origin and purpose of them are unknown. A popular theory is that these stations are intended for spies in the field using a One Time Pad. Another theory is that they are used in drug smuggling operations.
IRTS launch new group email service
The IRTS Committee are delighted to announce the launch of their new group email service using the groups.io platform
W2AN/1BCG Special Event Feb 2022
Operators at the Antique Wireless Museum in Western, NY fired up a replica of the famous 1921 Transmitter, used to accomplish the first documented Transatlantic Ham Radio signals From Greenwich Ct. to Ardrossan Scotland
Online Talk: Newbury ISS school contact - the story
On Wednesday, March 9, Denby Dale Amateur Radio Society will have an online talk on hosting a school contact with the International Space Station, all are welcome to join the Zoom session
Vintage radios to be sold at auction
The personal radio collection of the late Pat Herbert is to be sold. He established Ye Old Hurdy Gurdy Museum of Vintage Radio at the Martello tower North in Howth
Eliminating radio interference from fridge compressors
Practical Sailor magazine features an article by Darrell Nicholson about eliminating Radio Frequency Interference from a fridge
Amateur Radio Digital TV and the Raspberry Pi computer board
The British Amateur Television Club (BATC) report one of their members Phil Hayes M0PIT demonstrated the Portsdown DATV transmitter at a Raspberry Pi Foundation event
Tropospheric Ducting
Propagation/Resources
In the spring and during certain climatic events, radio waves can travel long distances due to an atmospheric phenomenon called Tropospheric Ducting.
Top Amateur Radio Websites - Issue 2206
Coaxial Dipole Antenna, Cobweb Antenna, The Story of the Broadband Dipole, Zone Check Interactive Map, Decoding hand-sent Morse Code with Arduino, Morse code practice, HAMRS
AMSAT receives $93,795 ARDC grant for 3U spaceframe development
AMSAT has just received a generous grant from Amateur Radio Digital Communications (ARDC) for the development of a 3U spaceframe with deployable solar panels. This standardized 3U CubeSat space frame will serve as the mechanical platform for AMSAT's GOLF series of satellites as well as a new generation of low earth orbit FM satellites. The spaceframe design will be available to the public under an open access agreement
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