DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
Explore the world of Open Source SDR on VU3DXR. This tag covers advanced projects like the sBitx and zBitx high-performance transceivers. Access detailed DIY build logs, open-source firmware updates, and hardware modifications to enhance your software-defined radio station and signal processing.
The zBitx v2 update introduces a high-performance Wi-Fi architecture and fixes receiver “chuffing,” but v1 owners face “white screen” and voltage hurdles. This guide covers the essential SD card setup, the 9V power requirement, touchscreen calibration tricks, and the critical Pico vs. Pico W hardware check for a successful upgrade
Ashhar Farhan has officially unveiled the zBitx v2, a significant leap forward for the compact SDR transceiver. With upgraded hardware including a passive FET mixer and a game-changing Wi-Fi-based front-panel connection, the v2 fixes legacy bugs while paving the way for custom user interfaces.
sBitx v5.3 software update brings a touch-optimized UI, advanced FT8/FT4 automation, xOTA logging, CW decoding upgrades, and SWR protection — enhancing the Linux SDR transceiver platform.
Software Defined Radio technology has revolutionized base station infrastructure, laboratory-grade receivers, and bench equipment for years, yet handheld transceivers have stubbornly clung to traditional fixed-function architectures. The LinHT SDR shatters this paradigm entirely, delivering a genuine software-defined transceiver in a genuinely portable package.
Explore the sBitx v3 — an open-source Linux SDR transceiver merging computer and HF radio, enabling portable digital operation without a laptop
ZBITX is an ultra-portable 5 W all-band HF SDR transceiver with built-in FT8, CW, and digital modes powered by Raspberry Pi. Pocket-sized QRP radio for POTA/SOTA field operation without a laptop.
KV4P-HT turns an Android phone into a VHF/UHF ham radio via USB-C — an open-source ESP32 + SA818 transceiver add-on with APRS messaging, 1 W output, and fully off-grid operation