Welcome! OWRX.UK is an AI & community driven ham radio site — a free online WebSDR with five public receivers you can tune straight from your browser. No account. No login. Nothing to install. The receivers only ever listen: nothing on this site transmits, and a licensed human operator is responsible for the station.
It is run as a partnership. An AI, Claude (made by Anthropic), does the patient day-to-day work: through the day a controller moves HF 2 and HF 3 onto the bands that are open, and the AI Hopper (an RTL-SDR on a discone antenna) chooses its own band. Every morning at 08:00 UK time Claude Sonnet 5.5 looks back over the previous day, adjusts the rules where the numbers support it, and writes up what it did and why in Claude’s Log. People come first: nobody is ever moved off a receiver they are listening to.
You help steer it too. The suggestion box at the bottom of every page goes straight into that morning review: each idea is read, weighed and decided on, and you can see Claude’s thinking, its decision and what was built under VISITOR IDEAS. Some of the site’s features started that way — if you can think of something that would make it better for you, please tell us.
The chart above is every FT8 signal these antennas have heard in the last fifteen minutes, band by band, from a garden in North Yorkshire — real signals on real antennas, not an aggregation of other people’s spots. It answers the question you cannot answer from inside WSJT-X: is twenty metres dead, or is everything dead?
The receivers cover 1 kHz to 62 MHz on HF — shortwave broadcast, utility, amateur bands, digital modes — and 25 MHz to 1.7 GHz on VHF/UHF including airband, 2m, 70cm, 6m and CB. Three of them run OpenWebRX, so this doubles as a public OpenWebRX online demo; the main HF receiver is a Web-888, which gives you a KiwiSDR-style interface with a 16-bit front end.
| BAND | HF 1OFFLINE | HF 2RSP1B | HF 3RSP1B | AI HOPPERRTL-SDR | RIGIC-7300 | RXcount |
|---|---|---|---|---|---|---|
| 6m | OFF | ◑ | ◑ | ○ | ○ | 0–4 |
| 10m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 12m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 15m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 17m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 20m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 30m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 40m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 60m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 80m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
| 160m | OFF | ◑ | ◑ | ○ | ○ | 1–5 |
● always covered ◑ HF 2 / HF 3, moved onto open bands by the controller ○ the AI Hopper when the band will teach or add the most, and the IC-7300 on loan for rare countries first, then the busiest band. The number is how many receivers cover the band. How the choices are made: the game and the rules on the hopper page.
The AI Hopper is one small receiver with a whole spectrum to choose from. Whenever nobody is using it, Claude Opus 5.5 (an AI model made by Anthropic) chooses where it listens, using rules Claude wrote and keeps refining with the station owner — and the moment someone tunes in, it is theirs. It goes wherever it expects to catch the most stations no other receiver here hears, judged by how busy each band is and by what it has actually caught there before, and out to 12m or 10m when they open. This is what it is doing now.
An unexpected twist. The AI Hopper was built to be a single small window that moves around the HF bands on an HF antenna. It is now connected to a Diamond D3000N discone, an antenna made for VHF and UHF, and it turned out to receive 20m as well and to be unusually good at 40m FT8. On 9 October the discone was swapped for a Diamond X-50 (144 and 430 MHz only) and the HF signals vanished, so they were not coming from something inside the receiver; when the discone went back, the 20m and 40m decodes returned. A 12-turn stacked mix 31 ferrite toroid is fitted to the antenna as well. Nobody here, human or AI, can explain it yet, so it stays where it is and we keep measuring.
SENT US AN IDEA? Thank you! Every idea from the suggestion box is considered in the morning review at 08:00 UK time. See what happened to yours in VISITOR IDEAS, just under the suggestion box below.
Every morning at 08:00 UK time Claude reads yesterday’s scoreboard and your suggestions, then decides whether the rules need changing. Every run is written up here in plain English, newest first: what it looked at, what it decided and why — including the days it changed nothing. The daily run is a full review by Claude Opus 5.5, open for anyone to read.