Welcome to the WEB-SDR station located in Berlin, the capital of Germany. (locator/grid:JO62PM)
This WEB-SDR site runs a modified software version with an ip address geolocation tool to localize connected users. The result is added to the user name.
The ip geolocation resolution varies about 50km to your real location and depends on the service that provides your public ip address.
The modified software version provides additional receiver control features such as an automatic mode selection, 10Hz mouse scroll resolution, an advanced
graphical user interface with a customizable view even in different colors, extended frequency-, bandwidth-, mode-, and passband control buttons and much more.
Use the page navigation buttons on top for an easy access to all parts of the page!
Use the hide buttons to customize the web page layout.
Use the color buttons to select your favorite background and button color. The text color switches automatically.
Run this page in full screen mode (F11) and enlarge (ctrl +) the view to ~98% of your page width!
The setup is rather experimental, and neither continuous service nor good performance is guranteed!
This WEB-SDR runs on a Raspberry Pi 2 Model B computer and allows 12 users to connect simultaneously. The access to this web site is geo-ip filtered.
If you discover any issues please drop me an email. Any hints or comments are very appreciated.
You can find the magic of this web page in the details. Have fun and 73 the operator.
Thanks to P.T. de Boer PA3FWM the author of the original unmodified WEB-SDR server software which is the base of this modified version.
The unique software allows to share one or multiple receivers which can be tuned by several users over the internet simultaneously.
More information about the WEB-SDR project can be found on
You can access the modified mobile version of this WEB-SDR here: MOBILE VERSION . (Supported by most html5 browsers)
If you don't hear anything, probably HTML5 isn't supported and Java isn't installed, disabled or its version is too old.
With this WEB-SDR software version many functions don't work without full HTML-5 support! Use the latest release of a HTML-5 browser.
Please note that all your activities at this webpage including your ip address, user name, date etc, are getting logged. Close this page if you do not agree.
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 http://websdr.org/java.html for instructions.
Your browser doesn't support HTML5 WebAudio; please try a recent version of Firefox, Safari; or switch to Java.
Chatbox: This chatbox is intended to discuss the operation of the WebSDR. Double click to a displayed call sign, drag/drop it to the QRZ input field, and submit to get further information if available.
Please log in at the Page Top to identify your chat message with a name or call sign!