This is a WebSDR receiver, located in Silec, Poland, QTH KO04SD. Photos available here -- yes, highly experimental design. It is operated by Argon. More information about the WebSDR project can be found on

Note: for listening to UVB-76 / UZB-76 / МДЖБ / ЖУОЗ / Buzzer, please try the stream: It could help saving some bandwidth.

If you use Chrome and have no audio on WebSDR sites see the second entry here

If you find this SDR useful you might consider supporting us Become a Patron!
Special thanks to:
Caladan, Remco, HA621N, BigOS, EC120, 777, dmhz, Martin

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.

? dB; peak ? dB;
mute squelch autonotch

Gain control: automatic manual

Signal strength plot:
Waterfall view:
Or use scroll wheel and dragging on waterfall.
Logbook: 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

This chatbox is intended to discuss the operation of the WebSDR.
The operators of this site disclaim any responsibility for text appearing in this chatbox.