DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
Explore a collection of amateur radio projects including DIY antennas, HF transmitters, receivers, and practical ham radio experiments. Find step-by-step guides, circuit ideas, and weekend builds for radio enthusiasts, makers, and ham operators looking to learn and build their own equipment
PhaseLatch Mini is a compact STM32-based SDR digitizer with dual 12-bit simultaneous ADCs and 210 kS/s USB I/Q streaming. Designed for use with PhaseLoom front-ends, it delivers clean HF/VHF signal capture for GNU Radio, GQRX, and SDR experimentation.
The dual-band 144/430 MHz Square Loop Antenna is one of the most efficient and compact VHF/UHF antennas that amateur radio operators can build at home. Designed to cover both the 2-meter and 70-centimeter bands, this antenna offers excellent gain, low noise reception, and impressive SWR when constructed correctly.
Ditch the lossy traps and discover the Morgain Antenna—a clever, compact dual-band dipole for 40m and 80m. Operating at just 20 meters long, this wire-only design uses folded elements to achieve resonance without bulky coils. The ultimate space-saving solution for your HF station
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”
The ATS Mini receiver has long been a favorite among hobbyists and Shortwave Listeners (SWLs) for packing incredible functionality into a tiny, portable package. Now, the latest iteration, the ATS Mini V4, arrives on the scene, building on the success of its predecessors (V1, V3, and V3S) with significant enhancements that cement its status as a top-tier micro-controlled radio.
From the smallest Wi-Fi chip antenna to the largest High-Frequency (HF) wire arrays, radio antennas are the crucial link between your radio and the airwaves. They are marvels of physics, yet decades of folklore have created persistent myths that trip up even seasoned operators.
Explore compact 40 m HF antennas including shortened dipoles and base-loaded verticals for space-limited ham radio setups. Practical designs enable effective 7 MHz operation in small yards, portable, or restricted installations
The GM4JMU shortened dipole uses loading coils to deliver full 40 m band performance in under 10 m span. Ideal compact HF antenna for small gardens, rooftops, and portable ham radio installations.
New Quansheng UV-K5/UV-K6 radios use a PY32 MCU incompatible with STM32 firmware — flashing custom firmware can brick the radio, making MCU identification critical before updates
Master Your Amateur Radio License: Complete ASOC study Guide for Indian Hams Getting your Amateur Station Operators Certificate (ASOC) in India opens the door to the exciting world of ham radio communication. Whether you’re 12 years old or 80, this comprehensive ebook by D. Prabakaran provides everything in ASOC study guide you need to pass […]