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P25 and NXDN: Commercial Standards in Amateur Radio
P25 and NXDN are commercial digital radio standards used in amateur radio. P25: public safety standard with FDMA/TDMA. NXDN: Icom/Kenwood, 6.25 kHz narrowband, efficient. Important: Encryption prohibited in amateur radio! Use only unencrypted mode. 73 –…
Activity Contest on the Tischberg – my first Sporadic E from a summit
1063 metres, a porter, a loose connector – and in the end a 59+60 from England on 6 metres. OE5HKT on his activity contest on the Tischberg and his first Sporadic-E QSO from a summit.
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.
D-STAR Explained: Reflectors and Callsign Routing
D-STAR (Digital Smart Technologies for Amateur Radio) was the first digital voice system designed specifically for amateur radio — and it is still in daily use. This article explains what happens under the bonnet: how the…
Legendary Amateur Radio Transceivers – Radios That Made History
Some amateur radio transceivers are more than mere technology — they are milestones that fundamentally changed the hobby. From the glowing valves of the post-war era to the Software Defined Radios of today, certain transceivers have…
IOTA (Islands on the Air): Island DXing and Awards
First the awkward news: Austria has not a single IOTA island. Not the Donauinsel in Vienna, not the islands in Lake Wörthersee, none at all. Anyone in OE who wants to activate an IOTA reference has…
ARDF (Amateur Radio Direction Finding): Fox Hunting
Five transmitters are hidden somewhere in the forest. Each one comes up for exactly one minute, then the next takes over. You have a map, a compass, a direction-finding receiver and running shoes — and you…
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…
RaDAR Rally: Set Up Fast, Make Contacts, Move On
Imagine this: you are hiking through the Austrian countryside, you set up a complete amateur radio station in just a few minutes, make five contacts, pack everything away — and walk another kilometre to do it…
Reverse Beacon Network (RBN): Global Skimmer Network
You call CQ on 14025 kHz, nobody answers — and 30 seconds later you know that someone in Finland copied you at 22 dB above the noise. That is what the Reverse Beacon Network does: a…
WSJT-X Modes for VHF/UHF: Q65, MSK144 & Co — and Where FT2 Actually Belongs
On VHF and UHF it is not power that decides, but the right mode. Everyone knows FT8 from HF — but on 2 m, Q65 still pulls signals out of the noise long after FT8 has…
What Counts When Nobody Is Counting
Without points, hardly anyone would be standing on a summit at five in the morning. The programmes are a gift to this hobby. And still there is that moment when you realise: right now I am not a person to the other operator, I am a data field.
