Open Hamclock Backend

OHB is an open-source, backend replacement for HamClock, consequently it maintains the HamClock interface by dynamically generating live propagation data, maps, and feeds. It can be hosted on compute as small as a Raspberry Pi3B+.

To use OHB as your backend server follow these instructions

If your HamClock runs as an app, e.g. on a Raspberry Pi just start it with the -b option ( -b ohb.hamclock.app:80)

OHB Repository
Hamclock Client Repository
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Community Server

You are very welcome to use our backend server by simply pointing your Hamclock at: ohb.hamclock.app:80 which is run by a small group of radio amateurs. This is a dedicated server racked in a UK datacenter but can be used Worldwide.

Self-Hosted

Or you can host your own backend, in which case all maps and data feeds are generated on your own compute, furthermore OHB can be hosted on hardware as small as a Raspberry Pi 3B+

Independent Data Sources

OHB serves data from its own internal services, it does not proxy any data from Clear Sky Institute, accordingly our project only uses publicly documented data sources and runs independently.

Tuned Scheduling

Each supporting file type has a data generation script running on a specifically tuned crontab, matched as closely as possible to the original data generation times while being friendly to CPU and memory.
Community Powered

We have built a community-powered backend to keep HamClock running, with this purpose in mind, Discord is where we collaborate, troubleshoot, and exchange ideas — no RF license required.

Backend Repository
Client Repository
Join Groups.io
Join Discord
OHB is and always will be free to use and download.