A site for Amateur Radio Operators, by Amateur Radio Operators.





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Licensee Hit With $24,000 Fine for Jamming Net, Failure to ID: FCC

An investigation by the Federal Communications Commission (FCC) results in a large fine against a California amateur radio license holder. A Notice of Apparent Liability Forfeiture (NALF) for $24,000 has been filed against Phillip J. Beaudet, N6PJB, of Burney, California. According to the filing, the penalty is for Beaudet “willfully and repeatedly interfering with the radio communications of t...

ARRL Hudson Division has New Vice Director

Ed Wilson, N2XDD, of Shirley, New York has been appointed Vice Director of the ARRL Hudson Division by ARRL President Rick Roderick, K5UR.

Wilson succeeds Nomar Vizcarrondo, NP4H, who was appointed Director of the ARRL Hudson Division in March. Wilson will serve in the position for the remainder of the 3-year term that ends December 31, 2024.

Having developed an interest in radio as a child, Wils...

Outdoor 80m/40m bands Magnetic loop antenna
Antennas/Magnetic Loop
No matching adjustments needed. Directly perfect match to 50 Ohms using a remotely switched wideband transformer
Top Amateur Radio Websites - Issue 2321
Drive-On Antenna Mast For POTA, Shortened 40 meter Vertical for POTA SOTA, The Infamous Attic Dipole, Solar Panel and Ham Radio, RF Toroid Calculator, Stop RFI from Solar PV Systems, CY0S Log Online,
Active 3-30 MHz Hula-Loop Antenna for Shortwave
This active antenna for the shortwave band provides surprising performance, even indoors. As the name implies, the main loop is made from a Hula-Hoop with the metallic paint stripped off and a single turn of 14AWG copper wire inserted inside the hoop.
HF Radio Propagation Forecast
Propagation/Beginner's Guide
This page offers radio amateurs (experienced and beginners) a useful overview and tutorials on HF propagation conditions. Here you will find basic and advanced explanations, as well as practical methods, charts, maps, models, real-time measurements, assessments, comparisons, references, and an index.
ARRL Audio News June 2, 2023

ARRL Audio News June 2, 2023

ARRL Elected to Serve on SAFECOM

ARRL  The National Association for Amateur Radio® has been elected to serve on SAFECOM®. SAFECOM is a group of national thought leaders and officials within the emergency communications and response space that works to set standards used at every level. The program is managed by the Cybersecurity and Infrastructure Security Agency (CISA), an agency of the US Department of Homeland Security.


Museum Ships On-the-Air Weekend

If you like ships and are an amateur radio operator, 100 ships will be on the air from June 3 - 4 for the annual Museum Ships Weekend event.

Organizers stress that this is not a contest, but a fun event that begins at 0000Z on June 3, 2023, and runs through 2359Z on June 4, 2023.

While operation on any amateur frequency is allowed, most ships will be operating in the general portion of the bands....

Some secrets of Common Mode Chokes revealed
Antennas/Feed Lines/Choke
This is a small collection of K9YC info and my experiences. Problems by feed lines of 1/2 lambda length. CMCs in transmitting and receiving systems. Antenna unbalance, Maximal allowed power, Choke winding tips.
“He Touched So Many Lives” Chip Margelli, K7JA (SK)

The airwaves are markedly dimmer this week, social media is filled with heartfelt tributes, and industry leaders are mourning. Longtime fixture of amateur radio Charles “Chip” Margelli, K7JA, passed away after a brief illness. Margelli was an ARRL Life Member.

“The light and love of my life is gone,” Margelli’s widow Janet, KL7MF, posted on Facebook. “He enjoyed 60 wonderful years as a ham and 4...

Estimated International Sunspot Number
The estimated international sunspot number (EISN) is a daily value obtained by a simple average over available sunspot counts from prompt stations in the SILSO network.
Oregon Tualatin Valley Amateur Radio Club
Affiliated with the American Radio Relay League in the Oregon Section of the Northwestern Division
Short receiving loop antenna
This page is a project for a small loop antenna for reception of short wave broadcasting. It is in Portuguese and contains pictures and schematics to build your own antenna
FT-817 internal battery power Fix
Radio Equipment/HF Transceivers/Yaesu FT-817
If your FT-817 has stopped powering up from the internal battery but works from external power, then maybe the internal battery fuse has blown. There is a small PCB mounted fuse to protect the battery and radio. This fuse can blow, if it does your radio will not work from battery power. This page will describe how to test the fuse and describe how to make a repair. Ham Radio Super Club. 146.790 - Node: 4796 The heart of Montreal
Harford County Amateur Radio Emergency Communications
Trained amateur radio communicators under ARES, RACES and Skywarn serving Harford County, Maryland communities
Shortened 30m Dipole
This article describes the construction of a 9,50 m long dipole for the 30 m band (10.1 MHz to 10.15 MHz). It was designed to be mounted ca. 6 m above ground inside an attic. The calculations were performed by OE1MEW
Mains RF Filter
Technical Reference/Radio Frequency Interference/Noise Reduction
If RF noise threatens to take your hobby away, this could be probably a good solution to reduce or even eliminate RF Noise.
Portable Operating Tips for Ham Radios
Operating Modes/Portable Operations
This article is from the book Ham Radio For Dummies and features some tips for portable amateur radio operations, on Field Day or generic outdoor operation, like selecting the proper antenna and portable power.
ARRL Audio News May 26, 2023

ARRL Audio News May 26, 2023

ARRL Headquarters Will Be Closed on Memorial Day, Monday, May 29

ARRL  The National Association for Amateur Radio® honors and remembers the ultimate sacrifice made by those who served in the U.S. armed forces. ARRL Headquarters will be closed Monday, May 29, 2023, in observance of Memorial Day. Many of the member services and information offered by ARRL are accessible on our website 24/7.

There will be no W1AW code practice or bulletin transmissions on Memori...

Dayton Hamvention® 2023 Wrap Up

ARRL greeted attendees in its large exhibit area in the "Tesla" building. Traffic to the exhibit was brisk. Members and prospective members enjoyed meeting with dozens of ARRL program representatives and volunteers. The event hosted the ARRL Great Lakes Division Convention.

While the final count is still a few days away from being completed, Hamvention spokesperson Michael Kalter, W8CI, said thi...

Section Manager Update: Austin Elected, Bigley Re-elected, Gendron Appointed

The results of two balloted Section Manager elections held this spring were determined when the ballots were counted at ARRL Headquarters on Tuesday, May 23, 2023.

John Bigley, N7UR, incumbent Section Manager of the ARRL Nevada Section, was re-elected when he received 277 votes, and Jim Shepherd, W6US, of Sparks, received 177 votes. Bigley, of Las Vegas, has been serving as Section Manager since...

A High Performance RF Choke for the HF bands
Antennas/Feed Lines/Choke
Home brewing a high performance, high power common mode choke for HF bands
ARRL and FEMA Sign Agreement: Ham Radio is as Relevant as Ever

The agreement emphasizes the importance of skilled Amateur Radio Operators in times of crisis and the role of ARES leadership within the emergency communications space. 

ARES (see the ARES fact sheet at is a network of trained Amateur Radio Service licensees organized across the country to provide communications and other support to served agencies, such as local governments, ...

Gomez Nominated for Vacant FCC Seat, Two Commissioners Renominated

President Joe Biden announced three nominees for the Federal Communications Commission (FCC) on May 22, 2023. The President will nominate Anna M. Gomez for a vacant FCC seat. Two sitting Commissioners, Geoffrey Starks and Brendan Carr, will be nominated for new terms at the same time.


Gomez is an attorney with decades of experience in domestic and international communications law and policy. Go...

Christchurch Amateur Radio Club
Christchurch Amateur Radio Club Branch 05 of NZART ZL3AC
Ham Radio Science
A blod dedicated to SDR and RTL-SDR featuring sdr new and product reviews
Thunderstorm connected with Sporadic E propagation
Propagation/Sporadic E
Recent researches seem to support the hypothesis that Sporadic E propagation could be connected to presence of thunderstorms.
Raspberry PI remote Ham Radio Server
Technical Reference/Raspberry Pi
Remote Ham Radio via WebRTC Audio Raspberry Pi 3. Stream Transceiver Audio to and from the remote station though a Browser using WebRTC.
Dayton Hamvention Roundup Saturday May 20, 2023

Dayton Hamvention Roundup Sunday, May 21, 2023

by Mark H. Derks, KC1RVQ, ARRL Acquisitions Editor

Sunday at Dayton Hamvention® proved to be a whirlwind affair, even if the crowds had thinned considerably from Friday and Saturday’s surge. In the ARRL Expo space, a few more books sold out, along with some of the popular sizes for 2023 ARRL Field Day t-shirts. Among the staff and volunteers present, there was a sense that the event had proved a...
This script queries the callsign database and returns the result to the command line. A XML subscription plan with is required for full functionality. callsign data query script written in Bash
DIY Yagi Antenna
This article describes the phases for the construction of a Yagi antenna. The calculations of the parameters are made using 4NEC2 software. This type of antenna is used for transmissions and receptions of electromagnetic waves. The project shown here refers to the frequency of 433.92 MHz.


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