DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
The Reception category focuses on pulling weak signals out of the noise using smart antennas, low‑noise front‑ends, and modern SDR tools. It covers topics such as HF broadcast listening, weather satellite reception on 137 MHz, ADS‑B and aircraft tracking, WebSDR resources across India and Asia, and general SWL (shortwave listening) techniques. You’ll find practical antenna designs, preamplifier ideas, and receiver setups that improve copy without requiring huge towers or expensive commercial equipment.
The broadband butterfly (bi-square) antenna uses two connected square loops to deliver stable 50–75 Ω impedance, low noise, and several dB gain over a dipole across VHF/UHF bands. Simple bidirectional design requires no tuning and scales easily for 144 MHz and 430 MHz operation
Build a low-noise VHF RF preamplifier using the MAX2633 MMIC to improve receiver sensitivity and antenna signal strength on 144–148 MHz. Simple biasing and matching provide wideband gain for FM, repeater, and weak-signal reception.
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.
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.
Shortened G5RV antenna design: a compact multiband HF dipole covering 20m–6m bands with ladder-line matching and 4:1 balun for portable or small-yard installs.
Pocket SI4735 Dual Core Decoder firmware upgrade adds 400 kHz waterfall, improved SSB/CW/RTTY decoding, and faster scanning — transforming the ATS Mini into a powerful DSP pocket receiver.
Build a compact 40 m vertical antenna using a 3.4 m radiator and 15 µH base-loading coil — a shortened quarter-wave HF vertical delivering strong 7 MHz DX from limited space.
After weeks of anticipation and user feedback, the ATS Mini V3S has officially hit the market. The new release directly addresses the battery drain issue that affected its predecessor, making this a much-needed upgrade for loyal ATS users. What’s New in ATS Mini V3S? The V3S model is not just a minor update—it’s a refined […]
GOES-R satellite reception guide — assemble an L-band dish/patch, filtered LNA, and RTL-SDR to capture continuous high-resolution weather imagery without internet