DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
Amateur radio digital modes including FT8, FT2, SSTV, and WSPR with guides, software tools, and DIY interfaces for HF weak-signal communication.
Imagine a digital network where every radio node talks to others, passing messages automatically without the internet. That’s Meshcore. This post explains how ham operators can use cheap LoRa boards to build resilient, local data links for texting and telemetry.
The amateur radio landscape is shifting rapidly with the rise of the “FT” digital modes. While FT8 remains the king of weak signals, the faster FT4 and the experimental FT2 are challenging its dominance. This guide breaks down the technical differences, performance trade-offs, and best use cases for each mode to help you master the HF bands.
Meshtastic is an open-source LoRa mesh networking platform that lets ham radio operators build off-grid text messaging and GPS tracking networks with no infrastructure. Whether you are an experimenter, an emergency communications volunteer, or simply curious about where digital modes are heading, this guide covers everything you need to know to get started with Meshtastic ham radio.
FT2 promises to clear a pile-up in the time FT8 takes to finish a single exchange. But speed always costs something — here is what the global ham community has actually discovered after months of real-world use.
Every vessel larger than 300 gross tons is legally required to broadcast its identity, position, speed, and heading every few seconds on VHF radio. With a $25 RTL-SDR dongle and free software, you can receive, decode, and map those live transmissions from your living room — no licence required, no nautical background needed. This guide walks you through the AIS standard, the hardware and software stack, antenna options, and how to contribute your decoded data to global ship-tracking networks.
It took just one night — February 16, 2026, 22:47 UTC — for a small group of Italian radio amateurs to change the digital HF landscape forever. FT2, developed by Martino Merola IU8LMC of ARI Caserta, compresses a full ham radio QSO to as little as seven seconds, running four times faster than FT8 and twice as fast as FT4. Within two weeks, it had been spotted on PSKReporter from dozens of countries, spawned two incompatible software implementations, and ignited a fierce debate about open-source ethics, automation, and the soul of amateur radio digital operating. This is the complete story of FT2 — the mode, the schism, and what comes next.
In February 2026, amateur radio gained its fastest weak-signal digital mode — and immediately fractured it. FT2 promised ~4-second QSOs and contest-level throughput, but within days of its first on-air tests it split into two incompatible implementations. Here’s the full story of the “FT2 war,” why it happened, and what it means for HF operators everywhere.
Join FCC-licensed WQ2XDM’s 8-meter experiment on 40.680 MHz FT8 and 70 MHz WSPR/FT8. Monitor 24/7 digital modes, decode Sporadic-E signals with SDR, and contribute real propagation data for future band access. Schedules, tips inside.
FT2 promises ultra‑fast QSOs with 3.8‑second cycles and up to 240 contacts per hour, but early adopters are divided. This in‑depth report analyzes FT2’s technical trade‑offs, including its weaker –12 dB sensitivity, very tight ±50 ms clock requirement, Windows‑only Decodium client, and limited award support. It also compiles global feedback from Facebook, Reddit, YouTube, blogs, and WhatsApp groups—ranging from contesters who love the speed to operators who see FT2 as risky, unnecessary, or too fragile for weak‑signal DX.
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.