Getting Started with FreeDV: A Beginner’s Guide to Digital Voice on Amateur Radio

Getting Started with FreeDV: A Beginner’s Guide to Digital Voice on Amateur Radio: Learn FreeDV digital voice for amateur radio. Beginner's guide covers setup, equipment, modes, and making your first contact using open-source software.

If you’re an amateur radio operator looking to explore digital voice modes beyond the usual FM repeaters, FreeDV offers an exciting opportunity to experiment with open-source digital communication. This guide will help you understand what FreeDV is, why it matters, and how to get started with this fascinating mode.

Building Sovina 40M Class E CW Transmitter with BS170 MOSFETs

Building Sovina 40M Class E CW Transmitter with BS170 MOSFETs: High-efficiency 40M CW Class-E CW transmitter using BS170 MOSFETs and 74HC02. Complete circuit explanation and build notes for QRP hams.

The Sovina 40m Class-E CW Transmitter is a compact and highly efficient HF CW transmitter designed for amateur radio operators who enjoy homebrew QRP equipment. This circuit is based on the original work by PY2OHH (Roberto S. Soria) and has become popular due to its simplicity, excellent efficiency, and clean RF output.

Build a Powerful FM Radio Bug Transmitter

Build a Powerful FM Radio Bug Transmitter: guide on building a high-performance FM radio bug transmitter using BC547 and 2N3563 transistors. Explore RF electronics with this powerful 100MHz DIY project.

For electronics hobbyists, few projects are as rewarding as mastering Radio Frequency (RF) design. This Powerful FM Radio Bug Transmitter is a classic, high-performance circuit that offers a significant step up from basic single-transistor designs. Operating on the 100 MHz FM band, it provides a robust and clear signal suitable for various wireless audio applications.

Tree Mounted Quarter-Wave Vertical Antenna

Tree Mounted Quarter-Wave Vertical Antenna: Technical explanation of a tree-mounted quarter-wave vertical antenna using only two sloping radials. Covers working principle, feed impedance and construction,

LinHT SDR: Open-Source Linux-Based Handheld Software Defined Radio for Amateur Enthusiasts

LinHT SDR: Open-Source Linux-Based Handheld Software Defined Radio for Amateur Enthusiasts: LinHT SDR — a next-generation open-source, Linux-powered software defined transceiver designed for amateur radio, experimentation, flexibility, and hackability.

Software Defined Radio technology has revolutionized base station infrastructure, laboratory-grade receivers, and bench equipment for years, yet handheld transceivers have stubbornly clung to traditional fixed-function architectures. The LinHT SDR shatters this paradigm entirely, delivering a genuine software-defined transceiver in a genuinely portable package. Built on Linux foundations, designed around open hardware principles, and architected for profound experimentation rather than appliance-level consumer operation, LinHT represents something fundamentally different.