Category: Technology
126.9 Kilometres on Half a Watt: How Carinthia's Mesh Network Grew to 32 Sites in Two Weeks
126.9 kilometres from the Koralpe into Slovenia, sent with half a watt. There is no provider and no mandate behind it, just eight people carrying boxes up mountains. A stocktake with numbers, and with what the numbers do not say.
MeshCore: Radio Without a Mobile Network. Now Is the Moment to Join In
There are moments when you can get in on a radio project early enough that your own participation still changes something. With MeshCore , that moment is now. The network is growing, the map still has…
Troposcatter and Rain Scatter – VHF/UHF DX via Atmospheric Scattering
On VHF and UHF, range normally ends at the horizon. But the atmosphere has some tricks up its sleeve that enable radio contacts far beyond line of sight — without the ionosphere, satellites, or the Moon.…
AREDN: Mesh Networks Using Wi-Fi Hardware for Amateur Radio
Imagine turning a second-hand Wi-Fi router costing EUR 30 into an amateur radio network node that automatically connects with other nodes, forms a self-healing IP network and runs services such as VoIP telephony, video surveillance or…
New Website: Homebrew Instead of a Kit — oeradio.at Now Runs Static
If the new green looks familiar: oeradio.at has been completely rebuilt. WordPress is history — the site is now static, much faster, and open source.
VOACAP Online: Understanding and Using HF Propagation Predictions
Anyone who operates on HF knows that propagation conditions determine whether a QSO succeeds or not. But must we leave it to chance? No — VOACAP Online lets you predict, plan, and optimise HF radio contacts.…
kv4p HT: Turning an Old Smartphone Into a 2-Metre Radio
A hands-on report by Michael, OE8YML My old Samsung Galaxy S9+ spent years in a drawer. Now it is, among other things, a 2-metre radio — and it gets used for other amateur radio and radio…
Alpine Propagation: How Mountains Affect VHF/UHF Propagation
Knife-Edge Diffraction Mountain ridges act as edges where VHF/UHF signals diffract. Enables QSOs over mountains. 2m/70cm benefit most. Mountain Reflection Smooth slopes reflect signals — dual-path effect causes fading. Optimal Locations High-elevation sites (alpine meadows, summits)…
Towers and Masts: Planning and Installing Antenna Supports
In amateur radio there is a simple, almost uncomfortable truth: height beats power . If you put your antenna a few metres higher and more in the clear, you often get more out of the band…
Receive Antennas for Low-Band: Beverage, K9AY and Flag Antennas
On the low bands — 160, 80 and 40 metres — a DX contact is rarely decided by transmit power, but by the station's ability to hear . Atmospheric noise (QRN) is so high here that…
Digirig Mobile: The Compact Digital Interface for Portable Operation
Anyone who wants to run FT8 , JS8Call, WSPR , or Winlink in the field knows the problem: a laptop, a transceiver, and between them a tangle of cables — USB sound card, CAT cable, PTT…
Receiving and Decoding Weather Radiosondes: Tracking High-Altitude Balloons with RTL-SDR
Every day, thousands of weather balloons rise around the world, equipped with radiosondes that measure temperature, air pressure and humidity – and transmit their measurements by radio to the ground station. With an inexpensive RTL-SDR dongle…
