Audio starts once you click to tune! 
ⓘ Click the frequency scale, one of the TX labels or one of the "Tune SAQ", "Alpha" or "Z" buttons to start audio.

Be sure to have the browser tab's >mute< option unchecked!

VLF receiver

Dedicated SAQrx,
located in Germany (Sauerland)

Setup:
E-field probe (PA0RDT MiniWhip)
Behringer UMC202 as ADC
PA3FWM SDR software
(Direct conversion receiver)

Try the "Z(oom)" button:  

 

 

 

*** Expect radio interference by a robot lawn mower today between 12:00 UTC and 16:00 UTC

 

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 http://websdr.org/java.html 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.
View:
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

 http://vlf.spdns.eu:8901/


[scale]

Peak value: ? dB
mute squelch auto-notch




Signal strength plot:
Frequency: kHz
 
 
 


Memories:
Bandwidth
? Hz @ -6 dB
? Hz @ -60 dB

 
 
Waterfall view


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

Chatbox:
This chatbox is intended to discuss the operation of the WebSDR.
The operators of this site disclaim any responsibility for text appearing in this chatbox.



Background photo courtesy of Anette and Stefan Nilsson, https://enturitaget.se

 

Statistics: