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.

Information about the WebSDR project and other servers can be found at ==> <==

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 the version is too old (i.e. pre-1.4.2).
NOTE 2 Antenna is normally Inverted-L (54m longwire) but can also be a MiniWhip or G5RV (2x17m), depends on the bands I'm using myself.

NOTE 3 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 4 No sound with Google Chrome Browser? Try this: chrome://flags/#enable-autoplay-ignore-web-audio -> set enabled.
From version Chrome v76.0.3809.100 try this: chrome://settings/content/sound -> allow/add url:

NOTE 5 All receivers are SDRplay RSP1A ==> Bring me to SDRplay info RSP1A page <==

NOTE 6 For blind people, the list of waterfall tags can be downloaded here: ==> Click me <==
However, the list is longer then the bands we support, keep that in mind.

Please support this project with a small donation so we can buy even better receivers in the near future as better and wider receivers are real expensive:

Become a Patron!

23/09/2018 - We have TeamSpeak as well and work with: TeamSpeak3 Server Link If the link doesn't work server:
09/01/2019 - Today 3 SDRplay SPR1A are in use, covering from 0-2, 2-4 and 5.3-7.3 MHz, if there are hickups please mail me.
05/04/2019 - Programmed a spamfilter that shows "Spammer Detected! Bye Bye", this is to notify the spammer that he is noticed and removed. Still do not click on any links in the chatbox if you are not sure!!
15/06/2019 - Motherboard replaced with Q1900M 4x2GHz CPU, had some troubles to get it working, turned out speedstep was messing websdr up.
29/09/2019 - As of today the teamspeak-server of is NOT allowed to use this server in any way.
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. It stores a cookie on your system only for this website that holds your name and call.

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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


Peak: ?dB Average: ?dB
Mute Squelch Autonotch

Signal strength plot:
Frequency: kHz

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

Bandwidth: ? kHz

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


Audio controls:
Audio out: left both right
Gain control: automatic manual limit
Hang time: