Tools for radio amateurs
Here you will find all of OERadio’s interactive tools and tools – designed for radio amateurs to learn, calculate and optimize radio operations.
🎓 Learn
QSO Buddy
Interactive QSO trainer. Learn radio conversations step by step – from the CQ call to the farewell. With different scenarios from casual to contest.
Antennenblick
Visualize antenna radiation diagrams interactively. Understand how different types of antennas radiate, how the installation height affects the diagram and which antenna is optimal for DX or NVIS.
FirstContact
Your entry into shortwave. Learn interactively how RF propagation works, what skip zones are and how to make your first long-distance connections.
PrefixPlay
Learn amateur radio call sign prefixes in a playful way. A quiz game that helps you quickly recognize country prefixes – perfect for contest preparation.
CQ Nothing
Interactive learning tool for radio amateurs. Test your knowledge and learn new concepts in a fun way.
MorseFleet
Learn Morse code while sinking ships! Enter coordinates using the Morse key and sink the enemy fleet. With two difficulty levels and audio feedback.
BandBlick
Interactive IARU Region 1 band plan visualizer. Explore all amateur radio bands with spectrum visualization, segment details, special frequencies and filter options.
QBlitz
Q-group speed trainer with spaced repetition. Learn all exam-relevant Q-Codes in six training modes – from flashcards to exam simulation.
🧮 Calculator
Kabelblick
Coaxial cable loss calculator. Calculate the signal loss for 26 cable types at each frequency – from 160m to 1mm band.
Strahlblick
HF safety computer according to ICNIRP. Calculate field strength, safety distances and power density for your antenna system with visualization and PDF export.
Akkublick
Battery planning tool for portable radio operation. Calculate the optimal battery capacity for SOTA, POTA and other portable activities.
Wavelength calculator
Calculate wavelength from frequency and vice versa. Indispensable for antenna construction and frequency planning.
Decibel calculator
Conversion between linear values and decibels. Handy for power calculations and signal strength.
SWR calculator
Calculate SWR, reflection factor and return loss. Important for antenna adjustment.
🗺️ Maps
Relaisblick
Interactive map of all Austrian amateur radio relays. Filter by frequency band (2m, 70cm, 23cm), transmission type (FM, DMR, D-STAR, C4FM) and federal state. With search by call sign or location.
📝 Logging & QSL
WaveLog
Online logbook for radio amateurs. Log your QSOs, manage QSL cards and keep track of your activities.
QSL Generator
Create professional QSL cards online. Choose your design, insert QSO data and export print-ready maps.
📻 SDR & reception
WebRX
Software Defined Radio in the browser. Listen to amateur radio bands live via our SDR receivers or build your own WebRX.
🤖 AI assistants
FunkPilot
AI assistant specifically for radio amateurs. Chat with Ham Radio Tools, Voice CQ Generator, Contest Log Analysis and Propagation Consultant. All data remains local – no server storage.
OERadio MCP Server
Amateur radio tools for AI assistants. Integrate band plans, antenna calculators, cable calculations and more directly into Claude, ChatGPT or other AI assistants via Model Context Protocol (MCP).
All tools are free and are developed and maintained by the OERadio community.