DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
The radio category groups together posts that are about complete radios and operating rather than individual circuits—transceivers, receivers, handhelds, SDR rigs, and real‑world operating notes. You’ll find write‑ups on rigs like Curumim, sBitx, ZBitx, Baofeng UV‑5R Mini, uBITX experiences, and other commercial or homebrew radios, often with a strong “how it actually behaves on the bands” focus.
Learn how to build a simple and effective Audio Clipper Circuit using BC547 transistors and 1N914 diodes. This DIY guide covers schematic details, component selection, and how to prevent overmodulation in amateur radio transmitters for clearer, peak-limited audio.
Do you love electronics and want a fun, beginner-friendly project? Build a two transistor radio! This classic DIY project, featuring simple components, gained popularity years ago and still teaches radio technology effectively. Let’s explore how you can create your own two transistor radio easily. What is a Reflex Circuit? A reflex circuit cleverly reuses one […]
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.
In-depth review of the LILYGO T-Embed ESP32-S3 SI4732 multiband DSP radio covering hardware architecture, reception performance, firmware ecosystem, and real-world usability for makers, SWL, and ham radio enthusiasts.
Explore alternative firmware options for the ATS-Mini DSP radio, including G8PTN, ESP32-SI4732, and Goshante builds. Unlock enhanced usability, advanced DSP features, and customization beyond the stock firmware
Explore alternative firmware options for the ATS-Mini DSP radio, including G8PTN, ESP32-SI4732, and Goshante builds. Unlock enhanced usability, advanced DSP features, and customization beyond the stock firmware.
Ready for a better user interface and new features? Follow our simple guide to updating your ATS Mini DSP receiver firmware using easy web-based tools or desktop software
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 […]
ATS-20 is a compact SI4732-based multiband DSP receiver covering FM, MW, SW, and SSB — a highly sensitive portable radio with external antenna support and mod-friendly firmware