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
This FT8 digital interface connects a computer to a transceiver using a USB sound card, audio transformers, and optocoupler-based PTT control. It enables clean audio exchange and safe isolation, allowing reliable weak-signal digital communication modes like FT8 through proper level control and synchronization.