New Book Release: Salty Walt’s Portable Antenna Sketchbook

ARRL Teachers Institute Application Deadline April 30

Applicants for the summer 2025 sessions of the ARRL Teachers Institute on Wireless Technology must apply by April 30 to be considered. The application process is straightforward. Interested educators can find the web form at www.arrl.org/ti. ARRL covers all the costs of the TI, including travel, but there is a $100 application fee if the teacher is accepted.The Teachers Institutes are a product...

ARRL Exhibits and Forums Planned for 2025 Dayton Hamvention

The ARRL Solar Report

Solar activity has been at low levels with only minor C-classflaring through April 24, 2025, and is expected to be moderate witha chance of M-class flares (R1-R2, Minor-Moderate) through April 26.No Earth-directed Coronal Mass Ejections (CMEs) have been observed.A southwest CME was observed on April 23 and is considered to befar-side due to the lack of any on-disk plasma motion/flareactivity.  ...

Amateur Radio Helps 2025 Boston Marathon

Over 280 amateur radio operators volunteered during the 129th running of the Boston Marathon on April 21, 2025. Operators were working at virtually every location connected with the race, including the starting line, the entire course, the finish line, transportation, and various operations centers including the Massachusetts Emergency Management Agency (MEMA), the State EOC Unified Command Cen...

W1AW Facility Closed to Visitors April 28-30 for Maintenance

ARRL Ham Radio Open House Events Making Headlines

The ARRL Solar Report

Spaceweather.com reports a Cannibal Coronal Mass Ejection on April 15 sparked geomagnetic storms.  On April 16, the storm became severe (G4) with Northern Lights sighted as far south as France.  The storm is subsiding now to a category G1/G2, which could still produce high-latitude auroras. Although Regions AR4062 and AR4064 have been relatively quiet they are more structurally complex than ant...

Top Amateur Radio Websites - Issue 2507

Satellite Antennas Hints and Kinks, Building an End-Fed Half-Wave Antenna: A Step-by-Step Guide", CQ Ham Radio, Funkamateur, National Communications Magazine, Zetagi HP201 SWR Wattmeter Modification for HF Amateur Radio Bands, QST Magazine, Practical Wireless, The Communicator Digital Edition, SWL Contest 2025 MW and SW

World Amateur Radio Day 2025: Celebrating a Century of Communication

Top Amateur Radio Websites - Issue 2506

The Holy Cluster, Construction of a M0PLK Delta Loop Antenna, Top Performer for HF: The 80-Meter Skyloop Antenna, APRS TX I-Gate with APRX and the Universal Radio Controller, Building a 50 MHz Notch Filter with Coax Cable, The QubeDX modular CubeSat-style QRP transceiver, 70 MHz converter, Charging your laptop or tablet off-grid, Saturn PCB Design Toolkit, 70cm UHF Yagi Antenna

Top Amateur Radio Websites - Issue 2505

Minimalist Breadboard SDR Receiver with Pi Pico, Otto: Your Enhanced Assistant for WSJT-X, Microphone Audio Compression in SSB Radio, Building a radio repeater, Sputnik Regenerative Receiver: Homebrew Radio, AZIWORLD, SAT_EXPLORER, MyWaveRecorder, Pocket Tuner, CW_PLAYER,

SSB SWL contest 2025

Amateur Radio Clubs

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ICOM 7300 Rig Control Under Linux - Review and Troubleshooting Guide

Learn how to troubleshoot and configure ICOM 7300 Rig Control under Linux for seamless ... - Listed in Radio Equipment/HF Transceivers/Icom IC-7300

Trees as Conductors: Measuring Natural Impacts on HF Radio

This article published on QEX details measurements of tree conductivity and permittivity at HF ... - Listed in Antennas/Theory