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

Operated by Bas ON5HB and Marian ON3MS, e-mail ==> Bas and Marian <==, easylink is: ==> <==

!! Beware when we are transmitting ourselves reception will be disturbed !!

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

NOTE 1 Antenna is normally G5RV or Inverted-L (54m longwire), depends on the bands I'm using myself.

NOTE 2 All receivers are SDRplay RSP1A and RSP2 ==> SDRplay info RSP1A page <==
If you need information on how to install the RSP1A at your own, just mail us.

Please support this project with a small donation so we can buy better receivers, receivers are real expensive:

23/09/2018 - We have TeamSpeak as well and work with: TeamSpeak3 Server Link If the link doesn't work server:
29/03/2020 - G5RV came down this morning due to strong winds. 30/03/2020 Has been fixed. Antenna is up again, even higher then before.
25/06/2020 - 0-2MHz is now an SDRplay RSP2 thanks to AD PB9E. Thanks a lot Ad!!
24/10/2020 - Fixes many bugs in html, like ENTER = Record, also fixed items shown for blind people, let me know if I need to change more.
13/04/2021 - New bands added and new receivers - in use: 3xSDRplay - 1xAirspy - 2xNoElec-RTL.
11/06/2021 - Powersupply has been replaced with a fanless type as the noise in the shack was far too much.
20/06/2021 - As not many people used the high bands, I remove 20m/2m/70cm.
Don't be shy, please let us know your name or call in the box below, thanks.

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


Peak: ?dB Average: ?dB
Mute Squelch
Notch1 Notch2 HighBoost
DSP Noise Reduction:

Signal strength plot:
Frequency: kHz
Tuning steps:

Bandwidth: ? kHz


Waterfall view:


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: