DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
Build the legendary G5RV multiband antenna with this comprehensive DIY guide. Discover the technical balance between the 102ft radiator and the critical matching section that allows for 80m–10m operation. Learn how to optimize your feedline and avoid common RFI “growing pains”
Boost your VHF performance with the DIY 145 MHz Twin Delta Loop antenna. This technical guide explains how to construct a high-gain, bi-directional array using simple wire and a gamma match. Perfect for weak-signal 2-meter DX and satellite work without the bulk of a Yagi
Unlock extreme bandwidth with the UR0GT Broadband Avia Antenna (RW4HVN Mod). This technical guide explores the unique geometry that allows for seamless performance across Airband, 2m Ham, and Marine VHF without a tuner. The ultimate wideband solution for VHF explorers and monitoring enthusiasts.
A simple and effective 2-meter ham band sleeve dipole antenna design using a ¼-wave whip and a ¼-wave aluminium sleeve over copper braid.
DIY ESP32-S3 CYD 480×320 FM radio with SI4732 DSP and touchscreen tuning. High-resolution Arduino receiver project with scan and preset features.
Looking for an effective HF antenna for a high-rise or apartment balcony? This practical guide from VU3DXR details the construction and performance of a Loaded Loop Antenna—a compact, high-efficiency solution designed specifically for radio amateurs facing severe space constraints.
Mosquito TRX is a single-MOSFET 40 m CW transceiver for 7030 kHz using crystal control and direct-conversion reception — an ultra-simple QRP rig and SDR front-end for sound-card radios
Build the ZED dipole antenna for 2 m and 70 cm bands — a compact bent-element half-wave dipole with near-50 Ω feed, broadband VHF/UHF coverage, and simple DIY construction
The Faulkner FM Loop Antenna is a popular and highly effective design among FM radio enthusiasts and DXers worldwide. It provides excellent reception over the 87.5–108 MHz FM broadcast band and can be built easily using common materials. Despite its simple structure, it performs as well as many commercial indoor FM antennas
Have you ever wondered how tracking websites like FlightAware and Flightradar24 get their real-time data? The secret lies in a global network of volunteers who feed aircraft position data using surprisingly affordable hardware. In this comprehensive guide, I’ll show you how to set up your own aircraft tracking station using an RTL-SDR dongle and contribute data to multiple flight tracking services simultaneously.