DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
A collection of articles, guides, and DIY tools related to FT8 and other weak-signal digital modes in amateur radio, including digital interfaces, SDR integration (e.g., sBitx/JTDX), operating techniques, and emerging modes like FT2.
Developed by Martino Merola, IU8LMC, from the ARI Caserta team in Italy, FT2 is a genuinely operational new digital mode — not vaporware, not a proposal. It was publicly verified on 16 February 2026, with dozens of real QSOs logged on 40m and 80m bands.
FT2 is an emerging weak‑signal amateur radio mode now visible on PSKReporter, offering hams another option next to FT8 and FT4 for HF QSOs and propagation monitoring
Learn how to integrate JTDX with the sBITX SDR transceiver for reliable FT8 digital operation. Step-by-step setup, CAT configuration, and audio interface tips for amateur radio operators
Bridge the gap between your radio and PC with a custom-built FT8 interface. This guide covers circuit design, 1:1 audio transformers, and ground loop prevention for clean digital signals on HF.