This VHF / UHF WebSdr is located at the Nantwich Secret Nuclear Bunker, formerly R.A.F. Hack Green, now a working museum.

Location: ( 53° 1' 53'' N / -2° 31' 4'' W) QRA= IO83RA. / NGR SJ64590-47875

Operated by the Stoke-on-Trent ARS, SysOps are Joe ZL1PMY, Tony G1HMO and Martin G7CKX

Any queries regarding this websdr please contact 'hackgreensdr at'

Why not check out our HF websdr at Hack Green, you can view it here :-
For more information on the Websdr project, visit

For mobile devices, you can access the mobile version of this websdr here


28/03/2024 Our ISP is having issues with the microwave link that feeds Hack Green, this is causing outages and is being worked on.

31/03/2020 Thanks to the very kind folks at the Northern Utah Websdr, I have implemented DSP noise reduction and a second notch filter, also on FM there is now de-emphasis on the audio and sub-audible tone filtering.

If you would like to donate to help pay the electricity bill and allow us to further improve the websdr please do so below.

Full details here Websdr DSP Features

The latest Firefox update (August 2022) has stopped audio from automatically playing on the Websdr, you now have to specifically ALLOW it to play. I do not use Firefox, but it looks like you need to load the Websdr page, then depending on the Firefox version, go to settings, privacy, permissions, autoplay and enable sound.

The latest update to Chrome has once again broken the Websdr, see this document for workarounds.

If you are having problems after updating Java to version 8.0.45 then follow these instructions :- Java 8.0.45 problem

Note: Unless your browser supports HTML5 audio, you will need both Java and JavaScript enabled for this page to work properly. If you don't hear anything, probably Java is disabled or its version is too old (i.e., pre-1.4.2) or your browser does not support HTML5.

It seems you are using a mobile device; click here to switch to the mobile version of this site.
It seems Java is not installed or disabled on your computer. You need to install and/or enable it for this website to work properly.
Since Java version 7u51, Java needs to be enabled separately for each website; see for instructions.
Your browser does not seem to support HTML5 WebAudio; please try a recent version of Firefox, Chrome, Opera or Safari; or switch to Java.

Allow keyboard:
j k ← →: freq down/up (+shift/ctrl/alt faster)
u l c a f: USB, LSB, CW, AM, FM
z Z: center/zoom waterfall
g: enter frequency

Frequency: kHz

Or tune by clicking/dragging/scrollwheel on the frequency scale.

? kHz @ -6dB; ? kHz @ -60dB.
Or drag the passband edges on the frequency scale.
Waterfall view:
Or use scroll wheel and dragging on waterfall.

? dB; peak ? dB;
mute squelch Notch1
Notch2 High Boost
DSP Noise Reduction:
Signal strength plot:
Call of station that you hear:
Comments, if any:
Note: time, frequency, your name/call, and DXCC information are added automatically.
View the last 20 lines of the logbook, or the entire logbook (ctrl-click for new tab/window).

This WebSDR is currently being used by ? user(s) simultaneously:      compact view


As with the HF websdr, the chatbox has been removed due to inappropriate posts by certain individuals.