DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
A dedicated hub for Amplitude Modulation (AM) reception projects. This collection includes technical deep-dives into DIY crystal radios, AM Radio receiver, superheterodyne receiver alignments, and modern SDR configurations for the MW and SW bands. Whether you are restoring a vintage valve radio or building a high-performance synchronous detector from scratch, find the schematics and theory you need to improve your AM listening experience
The 2N7000 regenerative receiver is a classic single-transistor radio that combines simplicity with surprisingly high sensitivity. By using controlled positive feedback, the circuit operates just below oscillation, dramatically increasing gain and selectivity.
From Car Dash to SDR Lab: Turning the NXP TEF6686 Car-Radio Chip into a Versatile Multiband Receiver There’s a certain magic in hearing distant AM or FM stations fade in from the noise — a reminder of how much can be done with clever design and a bit of curiosity. Recently, hobbyists have discovered that […]
Maximize performance with minimal parts! Discover how the reflex circuit “recycles” its transistor to boost signal strength, making it the perfect DIY project for radio experimenters.
Discover the magic of “no-power” radio! Step-by-step instructions on building a crystal set that runs entirely on the energy of the radio waves it receives.
Solar cells can easily provide enough power to operate a small radio receiver. This DIY Solar Powered Radio project is an ideal set to take away on holiday. It covers the medium wave (AM) waveband, so why not laze on the beach this summer and listen to your favourite station. But first, let’s get busy with […]