Category: Technology
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MorseFleet: Learn Morse code while sinking ships
Learn Morse code in a playful way – while sinking ships! MorseFleet combines the classic ship-sinking game with Morse code training. Instead of simply typing in coordinates, you enter them using a Morse key (or…
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Kabelblick – coaxial cable attenuation calculator
Calculate the signal loss of your coaxial cables With Kabelblick you can quickly and easily calculate the attenuation of your coaxial cable at any frequency. No matter whether you work on shortwave, VHF, UHF or…
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Antennenblick: Interactively Understand Radiation Patterns
Anyone who works with antennas knows the problem: Radiation diagrams in books and online resources are often static, difficult to interpret and only show a single operating case. Antennablick changes that – a new, interactive…
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PrefixPlay: Learn call sign prefixes while playing
If you want to be quick in a contest or simply want to know where a call sign comes from, you have to know prefixes. PrefixPlay makes learning amateur radio call sign prefixes a game.…
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CQ Nothing: Why doesn’t anyone answer?
You call CQ at 20 meters – and there’s… nothing. No answer. CQ Nothing helps you understand why this can happen and how to systematically analyze errors. What is CQ Nothing? CQ Nothing is an…
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What is an SDR? An overview for radio enthusiasts
Software instead of hardware: The SDR principle A Software-Defined Radio (SDR) is a radio receiver in which a large part of the classic hardware is replaced by software. Instead of requiring separate devices for each…
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Setting up MSI2500 SDR (RSP1 Clone) on Ubuntu – step-by-step instructions
This guide shows how to get an MSI2500 based SDR receiver (like RSP1 Clones) running on Ubuntu Linux with GQRX. The instructions are also suitable for beginners without much Linux experience. What is the MSI2500?…
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Making SDR Accessible Worldwide: A Radio Amateur’s Guide to Cloudflare Tunnels
Or: How I learned to forget port forwarding and love the cloud 🙂 Introduction Dear radio amateurs! Tired of struggling with your router’s port forwarding settings? Annoyed by DynDNS services that give up at the…
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MeshCom: Your entry into a decentralized radio mesh network for radio amateurs
What is MeshCom? – a simple overview MeshCom is an open source project from the Institute of Citizen Science for Space & Wireless Communication (ICSSW), which aims to realize text-based communication via LoRa modules in…
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📱 Use HAMSIP with the iPhone – step by step for beginners
You want to make calls with your iPhone via HAMSIP? Here we will show you how to set up everything – from the VPN connection to the Hamnet to the finished telephony with a SIP…
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Setting up HAMSIP telephony on the PC – step-by-step
This is a follow-up to “HAMSIP Telephony: Our New Toy” and describes how to set up HAMSIP completely on a Windows PC, without a SIP phone and additional network hardware. 1. Request Hamnet access 2.…
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HAMSIP telephony – Our new toy
Some time ago we attended a HAMNET workshop in Vienna and since then we have been playing around with the Internet for radio amateurs. A separate number range on the Internet, starting with 44.xxx.xxx.xxx, is…
