OpenHamClock – The Amateur Radio Clock for Browser and Shack

19. February 2026 · Ferdl

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With OpenHamClock, there’s a modern, open-source tool that provides radio amateurs with a wealth of information at a glance – right in the browser. The project combines a world map, DX cluster, propagation data, satellite tracking, and much more in a single interface.

What is OpenHamClock?

OpenHamClock is a web-based amateur radio clock, inspired by the legendary HamClock by Elwood Downey (WB0OEW, SK). The project runs as a Node.js application with a React frontend and Express backend. It can be run locally on a Raspberry Pi, as a Docker container on a server, or in the cloud.

Features

World map with greyline, sun position, and shortwave path display
DX Cluster with real-time spots (RBN, PSK Reporter, DX Spider)
Space Weather – sunspots, K-index, band conditions at a glance
Satellite tracking for amateur radio satellites
POTA & SOTA Spots – parks and summits directly on the map
WSJT-X Integration – display FT8/FT4 spots live
Contest logger integration (N1MM, N3FJP)
Rotor control via PSTRotator
Dark/Light/Retro Themes and freely configurable layouts

Try it yourself

We run a public instance that anyone can use freely:

👉 https://openhamclock.oeradio.at

The instance runs with the callsign OE8YML and locator JN66to – just open it and explore the features.

Set up your own instance

The easiest method is Docker. All you need is a server with Docker and a few minutes.

1. Clone the repository

git clone https://github.com/accius/openhamclock.git
cd openhamclock

2. Adjust configuration

Copy .env.example to .env and fill in the key values:

CALLSIGN=YOURCALL
LOCATOR=JN66to
PORT=3000
HOST=0.0.0.0
UNITS=metric
TIME_FORMAT=24
THEME=dark

3. Start

docker compose up -d --build

After that, OpenHamClock is available at http://localhost:3000. Done!