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.
Digital modes
The digital modes category focuses on non‑voice, non‑CW communication modes such as SSTV, FT‑type modes, WEFAX, DRM, and other soundcard‑driven modes on HF and VHF. Posts typically walk through the complete chain: radio or SDR setup, interface wiring, software selection (WSJT‑X / JTDX, MMSSTV, fldigi, etc.), audio levels, and example screenshots or recordings
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.
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.
ADSBee 1090: An Open-Source ADS-B Receiver Built for Modern Aviation Tracking
ADSBee 1090 is an open-source ADS-B receiver that decodes 1090 MHz aircraft transponder signals using RP2040 PIO — a low-power standalone aviation tracker with Wi-Fi data streaming.
Getting Started with FreeDV: A Beginner’s Guide to Digital Voice on Amateur Radio
Beginner’s guide to FreeDV digital voice on HF using an SSB transceiver, computer, and sound-card interface. Learn setup, operating basics, and how open-source Codec2 delivers clear voice communication under weak-signal conditions
sBitx v3: The Linux SDR That Refuses to Be Boring
Explore the sBitx v3 — an open-source Linux SDR transceiver merging computer and HF radio, enabling portable digital operation without a laptop
Building an FT8 Digital Interface – Dive into Digital Modes
This FT8 digital interface connects a computer to a transceiver using a USB sound card, audio transformers, and optocoupler-based PTT control. It enables clean audio exchange and safe isolation, allowing reliable weak-signal digital communication modes like FT8 through proper level control and synchronization.