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Intoduction

WebSDR (Software Defined Radio receivers) connected to the internet via a server permit a number of simultaneous connections allowing listeners to independently tune any frequency within the band offered and hear the signals via their own computer audio output (speaker).

These Web SDR's are established and operated by individual amateur radio operators, radio clubs and universities around the world.

World WebSDR Map

Each website offers similar features to operate the WebSDR, firstly an introduction to the sponsor and their installation, followed by a spectrum or waterfall display for the band selected in the various selection boxes.
The type of modulation and filter bandwidth can also be selected to suit the signals you wish to monitor.

The use of HTML5 allows the WebSDR's audio stream to play directly via your compatible browser (Chrome, Edge, Opera and Firefox.) All of these enable full access to any of the WebSDR's in the list below without resorting to the installation of any additional software.

So lets get started - here is a selection of WebSDRs in the UK. You will notice they offer a range of different bands to monitor. The first is Hack Green - Great for monitoring the Sunday morning MSARS 80m club net!

N.B. If there is no audio make sure that you have opened up the WebSDR in one of the browsers above.

iPad Users: Click 'IOS audio start' which you will find on the RH side at top of the waterfall next to HTML5 button.

 

Web SDR Name Location Bands Covered Link
       
Hack Green HF Nantwich, Cheshire

 

160m; 80m; 60m; 40m; 20m; 17m.

 

https://hackgreensdr.org:8901
Hack Green VHF UHF Nantwich, Cheshire

 

70cm 2m 4m + (10m)

 

https://hackgreensdr.org:8902
Southampton Wireless Society Farnham

 

LF 2m 70cm 3cm + Follow the ISS, Funcube-1 and High Altitude Balloon Transmissions on the Satellite Tracking Map

 

https://farnham-sdr.com
University of Twente Enschede, Netherlands

 

0-29MHz continuous - Includes WSPR and Chirp Receivers. Full instructions on their site.

 

https://websdr.ewi.utwente.nl:8901

 

General list of sites Over 100 SDR's

 

For the latest list click:

 

https://websdr.org