Slow Scan Television is a method of transmitting still images over radio using audio frequency tones. The term “slow scan” distinguishes it from conventional fast-scan television (like broadcast TV), which requires much wider bandwidth.
Radio Waves Weekly — Issue #004
This week brings exciting developments in Reverse Beacon Network technology, groundbreaking antenna innovations, and major updates from the world of SDR. From new digital mode capabilities to citizen science initiatives, there’s something for every ham radio enthusiast.
Reverse Beacon Network: The Ultimate Guide for Ham Radio Operators
The Reverse Beacon Network represents one of the most significant technological advances in amateur radio during the past two decades. By providing instant, objective feedback about your transmissions, the system empowers operators to understand their stations better, optimize their performance, and make informed decisions about when and where to operate. Whether you are testing a new antenna, chasing DX, competing in contests, or simply exploring the bands, the RBN adds a dimension of awareness that was previously impossible.
uBITX Microphone Preamplifier
Simple 2N3904 microphone preamplifier for uBITX V3–V6 transceivers that fixes low mic audio and restores full transmit power. Powered from the MIC+ line with adjustable gain for clean, natural SSB modulation.
Bi-Square Antenna: A High-Gain design for upper HF and VHF
Build a high gain bi-square antenna for higher HF bands. Get 4dB gain over dipole on 10 meters with detailed calculations, matching solutions, operation tips
DIY HF Linear Push-Pull Amplifier with IRF510 MOSFETs
Learn how to build a high-performance HF Linear Push-Pull Power Amplifier using affordable IRF510 MOSFETs. This guide includes a full schematic, bias adjustment tips, and transformer winding details for 10-40W output across the HF bands.
Practical guide to receiving HF weather fax WEFAX / Radiofax
Weather Facsimile—commonly known as WEFAX, HF-FAX, or Radiofax—is easily one of the most rewarding niches in the shortwave hobby. There is a certain “magic” in tuning your receiver to a scheduled frequency and watching a high-resolution synoptic chart or satellite image slowly materialize on your screen, line by line, over several minutes.
DIY 80m Magnetic Loop Antenna: A Compact Solution for Low Bands
DIY 80 m magnetic loop antenna: 1.5 m copper tubing loop with gamma-style feed and air-variable capacitor, delivering low-noise 3.5 MHz HF performance in small areas
sBitx v5.301 Update: New Features and Improvements Explained
sBitx v5.301 update refines the v5.3 platform with FT8/FT4 stability fixes, UI polish, improved logging/UDP integration, and CW decoding tweaks — enhancing reliability of the Linux SDR transceiver
Radio Waves Weekly — Issue #003
Sunday, February 08, 2026 Welcome to the third edition of our weekly digest! We are tracking the peak of Solar Cycle 25 and highlighting some incredible local and global engineering projects. 🔝 Top Links of the Week 1. ARRL Becomes Supporting Partner for America250 The ARRL has officially joined “America250” to celebrate the 250th anniversary […]