This is a WebSDR receiver, located in Heppen - Limburg - Belgium - JO21oc - 70m ASL.

It is operated by Bas ON5HB and Marian ON3MS, e-mail ==> Bas and Marian <==
Beware when we are transmitting ourselves the reception can be disturbed.

More information about the WebSDR project can be found on

NOTE 1 you 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).

NOTE 2 If you have an Android- or Apple-powered tablet or mobile phone, try this one: ==> Mobile version <==

NOTE 3 The dongles can be overloaded by big signals, attenuator (-10dB) is installed to stop this from happening.

Antenna is normally Inverted-L but can be MiniWhip, depends on the bands I'm using myself.

NOTE 4 Typical bands below 10MHz use LSB and bands above 10MHz USB, however, 60M uses USB as well as most professional users like coastguard and aircontrol.

NOTE 5 The very best radio-station of Belgium is JoeFM (dutch but continues music at night), direct stream: ==> JoeFM <==

30/03/2018 - We have replaced the motherboard and CPU and added 2 more dongles and testing a whole set of new driver parameters.
31/03/2018 - We had to remove bands because the new CPU still overloaded and they where not used much.
07/04/2018 - Replaced old fan-less Celeron 847 back, installed RealTime Linux-Kernel, seems to have solved all problems.
20/05/2018 - Installed high-pass-filter to remove unwanted AM above 2MHz.
Don't be shy, please let us know your name and call in the box below, thanks.

This chatbox is intended to discuss the operation of the WebSDR or chat between other users, please keep it nice.
The operators of this site disclaim any responsibility for text appearing in this chatbox.

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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


? dB; peak ? dB;
mute squelch autonotch
Signal strength plot:

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

Bandwidth: ? kHz @ -6dB; ? kHz @ -60dB.

Or drag the passband edges on the frequency scale.
Waterfall view:
Or use scroll wheel and dragging on waterfall.

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