Field Spotter
A spotting tool for portable Amateur Radio adventures.
M0TRT

Create a receive-only APRS iGate on a Raspberry Pi
Use a cheap SDR dongle and a Raspberry Pi to make a receive-only APRS iGate in an hour.
VA7ZEB

Hidden stories behind your favorite devices at new Huntsville museum
Signals Museum of Information Explosion highlights Ham Radio.
Advance Local

CW QSO Finder
This page lists CW operators who are available for a QSO.
Ham Radio Duo

World Wide Flora & Fauna
Latest activations from multiple sources.
OH3CUF

Election ethics and bylaws of the ARRL
Are they being applied to everyone?
K4FMH

Why do people tune up on your frequency?
He seemed to get the idea and apologized.
KB6NU

It’s SSB, but maybe not quite as you know it
A combination of AM and FM to achieve polar modulation and generate SSB.
Hackaday

National Pi Day special event net
Join us on the Roc-Ham Radio Network for a pop up net celebrating National Pi Day.
Amateur Radio Daily

Video

APRSDroid deep dive
NA7Q has forked APRSDroid and added several new features.
KM4ACK

Review: Retevis MA1 Full Duplex 2/70 Mobile Transceiver
With Cross band repeat comes full duplex, meaning you can transmit on one band while listening to the other.
Tech Minds

VHF & UHF operations
Three fellow Amateur Radio contestants in portable VHF and UHF.
EA3HSL

Satellite SO-124 FM repeater now active
At the request of AMSAT-EA, AMSAT has officially designated HADES-R as Spain-OSCAR 124 (SO-124).
AMSAT

KC8JCLogger: The logging software no one asked for
A terminal based POTA logging application that has interactive data collection for the QSO and rigctl functionality for aligning the radio’s settings.
KC8JC

Introducing the UCi120 Radio-Less-Node
A professional-grade USB Audio/PTT communications interface designed for applications like AllStar, EchoLink, and other push-to-talk (PTT) communications.
G1LRO

Successful transmission of an M17 text message using a CC1200 hotspot
m17msg is an M17 messaging client written in Go.
M17 Project

Chasing states
Sometimes, I just need a reason to get on the air. Specific operating goals can help with this, whatever form they take, including operating awards.
K0NR

Kent County (Md.) high school students command the HF bands
As part of the 90.5 WKHS(FM) broadcast track, its K3ARS station was used during the ARRL’s school club roundup day.
RadioWorld

24-hour Ham Radio learning marathon
India’s first 24-hour Ham Radio learning marathon saw the participation of 155 enthusiasts.
NewsDrum

Analyzing medium wave propagation during the 2023 Annular Eclipse
Thirteen radio enthusiasts across North America and Europe contributed to the study, capturing 10 Terabytes of SDR data.
SWLing Post

“Tiny Ten” Amateur Radio transceiver
A Teensy 4.1 based transceiver that makes extensive use of the OpenAudio_ArduinoLibrary.
W7PUA

No Ham reception at NAB show this year
Organizers are pausing “to reinvent the event for next year.”
Radio World

Video

Aircraft tracker with VHF airband radio
We build an aircraft tracker that can plot aircraft movement on a map in real time.
Tech Minds

What’s new at Digital Library of Amateur Radio & Communications — February 2025
It’s been more of an emotional roller coaster than I ever expected.
Zero Retries

Is a second solar max peak coming?
The most recent cycles are double peaked, with northern sunspots and southern sunspots.
Spaceweather.com

Having fun and receiver performance are not always related
The fate of analog-biased home brew radio.
Popcorn Electronics

Are you a rag chewer or a “59 73” operator?
One of the most controversial topics in Amateur Radio.
Ham Radio Outside the Box

Rising dues lifts CEO & CFO’s boats
Significant compensation adjustments occurred prior to membership dues increases.
K4FMH

Why every Ham should be an ARRL member
“You don’t know [the ARRL CEO]. I do.”
Coastal Waves & Wires

Skirt antenna helps reimagine AM radio in SoCal
“There just aren’t a lot of people around anymore who understand AM.”
RadioWorld

Listening in on Russian soldiers hijacking US military satellites
In the ’70s and ’80s, the US government launched a fleet of satellites which were simple radio repeaters in geostationary orbit.
RTL-SDR.com

DIY Yagi antenna sends LoRa signals farther
A simple Yagi antenna that can work at distances of up to 40 kilometers.
Hackaday

Video

Videos to educate and inspire Ham enthusiasts [AI content]
The series melds rich historical narratives with modern technological insights.
Ham Radio Gizmos

5 years of POTA experience revealed in 12 minutes
Five years and over 400 POTA activations later.
KB9VBR

Why mobile HF is a great option
A simple way to enjoy Ham Radio even more.
G5TM

Introducing wen goat 🐐 app
App tracks progress toward SOTA Mountain Goat award.
GM5ALX

RigExpert’s administrative office destroyed in Russian missile attack
All employees are safe and production remains intact.
RigExpert

The coming 21st century Amateur Radio networking revolution
Amateur Radio is poised to experience the equivalent of the Packet Radio Revolution, but in the 21st century, with 21st century technology.
Zero Retries

HamCation presentation shows how to ramp up club participation
KN2D gave a presentation on how to increase your club’s member participation. He’s a marketing guy by profession, and it shows.
KB6NU

The unlikely story behind Mauritius’ first satellite
How a small island nation built and deployed its first satellite.
ZME Science

Building an automated NavTex receiver using a Raspberry Pi and SDRplay
NavTex is a safety and navigational information radio text broadcast system for mariners.
RTL-SDR

SatNOGS network has reached 11 million observations
The 11 millionth observation received data from satellite Orbcomm FM113.
SatNOGS

Eric’s go-to low-cost, self-supporting antenna system for POTA
A 28½’ end-fed random wire (EFRW) antenna with three 17’ counterpoise wires.
QRPer

“H” is for Heathkits and Hams
The 1970s was a period of sustained growth for the Heath Company.
EE Journal

Video

Hamcation floor walk 2025
Take a walk with me around the main building at Hamcation 2025.
KM4ACK

Grimeton Radio Station – The early days of wireless communication in Sweden
A film about the history and function of the radio station.
wocomoTRAVEL

US Amateur Radio Emergency Preparedness Act re-introduced
Legislation would require HOAs to accommodate Amateur Radio operators by allowing use of outdoor antennas.
ARRL

ISS Fram2Ham SSTV simulation
International Space Station Fram2Ham Slow Scan TV simulation will take place February 13-17 on 437.550 MHz FM.
AMSAT-UK

Communicating with satellites like it’s 1957
Like the ’50s, it doesn’t take too much specialized equipment to communicate with satellites.
Hackaday

‘Unprecedented’ Starlink reentries
In January alone, more than 120 Starlinks deorbited, creating a shower of fireballs.
Spaceweather.com

OSU Amateur Radio Club embraces tradition while in new era of communication
The club received $9,700 from the American Radio Relay League Foundation to help it reform for the future.
Oklahoma State University

NRSC releases details of AM band RF noise study
Contrary to expectations, AM noise levels, even in the city of Baltimore, were moderately low on the roadways.
RadioWorld

Super portable POTA: One Watt, one tiny key, big fun
To maximize my limited operating time, I went with my go-to minimalist setup: The Elecraft KX2 and AX1 antenna—a truly dynamic duo.
QRPer

Why QRP? Isn’t life short?
QRP operating tips.
VE3IPS

dxclustermap
A configurable color-coded DX cluster map and table.
DO1ZL

Video

Make your new QSL card with Inkscape
Inkscape is a very powerful Open Source graphics program.
KB9RLW

Checking out the Discovery Dish
A simple & easy-to-use satellite antenna for everyone.
Saveitforparts

Introduction to single side band
Vintage Air Force film introduction to single side band.
YouTube

IP400 Network Project
The long term goal of the project is to implement a network that is capable of carrying digital voice and video, as well as catering to other services such as telemetry, messaging and more. At the home station a simple node based on a Raspberry Pi will get you onto the network, and at repeater sites a more complex controller will not only control analog and C4FM radios, but also include an IP400 transceiver for networking.
ADRCS

New FreeDV RADE heard in the wild
You can see quite dramatic selective fading but the speech is perfectly readable.
marxy’s musing on technology

Getting started with AREDN
ARDEN provides high-speed Mesh Networking and related services using Amateur Radio links in the 900 MHz UHF and several microwave bands.
Our Ham Station

Is Amateur Radio in the United States dying?
The short answer is NO. But it is CHANGING. Here is why and how.
K4FMH

A personal record: Winter Field Day 2025
Winter Field Day in a tiny RV on our land in upstate New York.
KM1NDY

Austria’s 500-kilowatt short-wave transmitter to be blown up
The system runs on rails so that it can be rotated 180 degrees.
heise online

Are we spoiled for choice?
Why there’s no better time to be a QRP field operator.
QRPer

How can a lossy wire on the ground work better than a quarter wave vertical antenna?
We can use a trick of geometry to support our claim.
Ham Radio Outside the Box

Video

Inside the Dayton Hamvention
Why it’s the heart of Amateur Radio (and the world’s largest).
W1DED

How does a radome affect radio signals?
People frequently ask how my geodesic radar dome affects radio reception or radio telescope imaging.
saveitforparts

10 Ghz FM propagation
120 miles across 6000′ Mt. Mitchell.
N4OFA

POTA spotting via low earth orbit
Using the APSPOT service with SMS via iOS satellite connection.
QRPer

The case of the shrinking Technicians
Many Technicians are only dabbling in Ham Radio.
K0NR

HAARP to conduct research campaign January 27-31
Campaign includes VLF generation and ducting, studies on STEVE airglow, and space debris detection.
Amateur Radio Daily

First two-way contact via geostationary satellite bounce
The satellite in question, Inmarsat GX-5, is stationed at an altitude of over 35,000 kilometers.
Dwingeloo Radio Telescope

Secret listeners – revealing the life of Amateur Radio heroes
The Voluntary Interceptors, amateur radio enthusiasts, helped break Axis codes in WW2, secretly listening for crucial intelligence from home.
East Anglia Bylines

RepeaterSTART
The only repeater app to have step by step instructions, an updated offline repeater database, topo map, and other features that Hams will find helpful. An Open Source desktop version is free and comes with all features except for the step by step instructions.
RepeaterSTART

How to get ARRL members back
Term limits, direct membership election of presidents, online streaming of board meetings.
K4FMH

CaribouLite SDR HAT for SDR on a Raspberry Pi
Frequency range (30 MHz up to 6 GHz) combined with TX capabilities make it enticing.
Jeff Geerling

HamSCI expands Personal Space Weather Station activities
New Zoom sessions will cover the operational aspects (scoping the network, project timelines, data collection topics, network monitoring, maintenance) of the PSWS network.
QRZ

Predicting earthquakes hours in advance by radio
The ionosphere becomes more inhomogeneous above the epicenter in the 12 to 16 hours before the earthquake.
Experimental Radio News

52 week Ham Radio Challenge roundup: Weeks 1-4
52 challenges for 2025, approximately one a week.
Ian Renton

How should I attach a Ham Radio antenna to my vehicle?
The good news is that there are multiple options.
OnAllBands

Video

24 GHz QSO
Two members of the Surrey Amateur Radio Communications Society completed what is believed to be the first 24 GHz terrestrial contact in BC.
SARC