This is a WebSDR receiver, located in Heppen - 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 !!

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: 2xSDRplay - 2xAirspy - 2xNoElec-RTL.
11/06/2021 - Powersupply has been replaced with a fanless type as the noise in the shack was far too much.
15/07/2021 - 2M and 70CM-high added.
28/07/2021 - 160M receiver added and lowered 0-1.8MHz so it may receive Alexanderson this time at 17KHz.
02/08/2021 - Added a second SDR-switch to let LF-160M use the long wire all the time.
29/12/2021 - For Ham radio we have our own very accurate NTP-network: (4 servers!) - System time : 0.000000042s slow of NTP - Last offset : +0.000038612s
03/01/2022 - Added another Airspy Discovery (160/80/40) and SDRplay (LF-MF/20M) as the Airspy is a bit better at low bands.
Don't be shy, please let us know your name or call in the box below, thanks.

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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
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: