This is a WebSDR receiver, located in Oostende, Belgium (JO11KF).
It is operated from the facilities of ON4OS, the UBA OST Radioclub in Oostende.

Send your comments or questions via e-mail to our sysop ON7DQ (use address on

AUDIO problems in Chrome browser ?
Type in the address bar : chrome://flags/#autoplay-policy
Put the "Autoplay Policy" to "No user gesture is required"
Restart the browser .. problem solved !

More information about the WebSDR project can be found on

PLEASE enter your callsign or a nickname below, otherwise your IP-address is publicly exposed.

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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 autonotch
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