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 www.arrl.org/ares) 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...
QRZ.sh
Software/Databases
This script queries the QRZ.com callsign database and returns the result to the command line. A XML subscription plan with QRZ.com is required for full functionality. QRZ.com callsign data query script written in Bash
DIY Yagi Antenna
Antennas/Yagi
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.
Dayton Hamvention Roundup Friday, May 19, 2023
by Mark H. Derks, KC1RVQ, ARRL Acquisitions Editor The Calm Before The first official day of 2023 Dayton Hamvention® began with half an hour of calm on the show floor. All the transceivers and whips, the coils of coax, and bins of SMA connecters lay abed beneath their evening coverings -- white plastic tablecloth in the ARRL exhibit space, black canvas covers for neighboring Icom, and others beyo...
Mid Sussex Amateur Radio Society
Ham Radio/Clubs/Europe/UK/Southern England
Mid Sussex ARS is an RSGB-affiliated club and meets at its headquarters in Burgess Hill on the 2nd and 4th Friday of each month. They organize various activities ranging from talks by members or guest speakers, evenings on the air using their shack's latest SDR equipment, training evenings and used equipment sales. As well as scheduled club nights, they run many outdoor activities throughout the year, including direction-finding contests, town days, social evenings and Special Event Stations. They even have their own free online training academy!
Battery University
Technical Reference/Batteries
A free educational website offering hands-on battery information. The tutorials evaluate the advantages and limitations of diverse battery chemistries, advise on best choices, and suggest ways to extend life.
Icom Announce ID-50 Compact Digital Dual Bander
The ID-50 is a compact VHF/UHF dual bander with both D-STAR and FM dual modes. Connecting to the D-STAR network, you can call a friend in another city, or other regions around the world with the ID-50. Smart functions such as Band Scope and Picture Sharing function enhance your QSO experience.
Top Amateur Radio Websites - Issue 2320
Countries with CEPT Licence, BG2FX Amateur Radios, JBOT QRP linear amplifier, RF Inductor Calculator, DCF77 , JJY, 9X5RU Rwanda,
T-minus 1 Day Until Dayton Hamvention – May 18, 2023
by Mark H. Derks, KC1RVQ, ARRL Acquisitions Editor The day before Dayton Hamvention® 2023, and already antennas porcupine cars at the University of Dayton Marriott. Cardstock “No Parking” signs issued by the Xenia, Ohio, police department top blonde stakes on the approach to the vendor parking at the Greene County Fairgrounds, a signal about the number of ham radio operators about to descend. The...
Conventional or Inverter Generators
Technical Reference/Alternative Power
Generators are broken down into three basic types: conventional gas, inverter, and diesel. What is the difference between these? Which is best? Do you even need a generator if you already have solar or other off grid energy available? Let’s sort it out.
ARRL Audio News May 19, 2023
ARRL Audio News May 19, 2023
Marc Tarplee, N4UFP, Section Manager of the ARRL South Carolina Section (SK)
Section Manager of the ARRL South Carolina Section Marc Tarplee, N4UFP, passed away on Sunday, May 14, 2023.
Tarplee served as the South Carolina Section Technical Coordinator for 7 years before becoming the South Carolina Section Manager in 2010. He was the longest-serving Section Manager of the century within the ARRL Roanoke Division.
He was a member of the York County Amateur Radio Society (Y...
KX3 assembly videos
Radio Equipment/HF Transceivers/Elecraft KX3
Four part series of assembly videos of the Elecraft KX3. Even if these videos are not a step by step format of the build but rather viewing completed steps with learned information, the author pass along to help your build go smoother
Guernsey Amateur Radio Society
Home page of the Guernsey ARS, with info about operating in Guernsey, and an online callbook
Simple Ham Radio Remote
Software/Radio Control
SimpleHRR is a free ham radio remote control web application (or web app) hosted by Raspberry Pi in the ham station to remote control a ham radio HF transceiver through a supported web browser from a Desktop PC, Laptop or Android phone. Supports recent ICOM IC-7x series transceivers
Virginia Beach Amateur Radio Club Receives Commendation
The Virginia General Assembly recently issued a resolution commending the Virginia Beach Amateur Radio Club, W4UG (VBARC).
House Joint Resolution 681 was carried in the Virginia General Assembly by Virginia Beach Delegate Karen S. Greenhalgh. The resolution was co-patroned in the Virginia Senate by the 8th District Senator Bill DeSteph and the 14th District Senator John Cosgrove.
The commendation...
Antenna Measurements
Antennas/Theory
Testing of real antennas is fundamental to antenna theory. The most common and desired measurements are the antenna radiation pattern including antenna gain and efficiency, the impedance or VSWR, the bandwidth, and the polarization. The procedures and equipment used in antenna measurements are described in this page.
Top Amateur Radio Websites - Issue 2319
HF DXView Propagation Map, HF EFHW Antenna Antenna Tuner, A Morse Code Practice Oscillator, URE WebCluster, MSF radio time signal, Morse Code Practice Oscillator, CW Key-to-Rig Switch Box,
National Hurricane Center Amateur Radio Station Annual Test
The amateur radio station of the National Hurricane Center, WX4NHC (NHC), located on the campus of Florida International University in Miami, will conduct their on-the-air Annual Communications Test on Saturday, May 27, 2023, from 9 AM - 5 PM EDT (1300z- 2100z).
This is the NHC's 43rd year of public service. NHC Amateur Radio Assistant Coordinator Julio Ripoll, WD4R/WX4NHC, reports that the purp...
Puerto Rico Radio Amateurs Celebrate Día del Radioaficionado
Radio amateurs in Puerto Rico have a day to honor their hobby, held this year on Tuesday, May 9. As set out by Law Number 50 of June 7th, 1996, every second Tuesday of the month of May is known as "Día del Radioaficionado de Puerto Rico," or Puerto Rico Amateur Radio Day. It is part of a larger celebration of National Radio Month held each May on the island.
Amateurs received a special proclama...
The Smith Chart
Antennas/Theory/Impedance matching
This tutorial introduces and explains Smith Charts, and then gives an introduction to impedance matching. Smith Chart is a tool to visualize the impedance of a transmission line and antenna system as a function of frequency.
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