Having audio problems with Apple devices/Chrome/Safari?

If you see a "Chrome audio start" or "Safari audio start" button below, Click on it!

If that doesn't work, read this article.

If you are hearing a "warble" or "stuttering" when listening to CW or digital signals, try using Firefox instead of Chrome - Read here for more information about this problem.


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
m: mute/unmute audio
s: toggle squelch

Frequency: kHz    VFO:  ?  
Enter frequency above, or tune by clicking/dragging/scrollwheel on the frequency scale. freq???
Mode:  ?      
   VFO:
Use the = kHz button to snap to the nearest kHz.


The bands in bold use high-performance receivers.  Please use only one server at a time!
Clicking a band below will switch to the test WebSDR



Memories:
Memories are stored as cookies on your computer, not on the server.

Bandwidth:
? kHz @ -6dB; ? kHz @ -60dB.  Default BW in bold.
  CW tunes using LSB and assumes a center frequency of 750 Hz.

PassBand Tuning (PBT):
Use buttons to select BW/mode or drag passband edges on frequency scale. PBT/IF Shift by Weert Websdr.
Logbook:
Call of station that you hear:
Comments, if any:
Time, frequency, your name/call, and DXCC information are added automatically.
View the last 20 lines of the logbook, or the entire logbook (opens new tab/window).


[scale]
? dBm  Peak ? dBm  ?
 S-meter squelch:        
  
Volume:
Mute Squelch Notch1
Notch2 High Boost
 DSP Noise Reduction:
More info about Noise Reduction, Notch2 & High Boost here

Audio buffering:
  More buffering may help with drop-outs or slow/jittery connections.
  Vari-Notch (Hz):   Off

   CW Peak (Hz):   Off    Ref. Tone


Gain control:   
RF AGC Alt AGC Manual
Gain:
Try "Alt AGC" for better AM reception, particularly with QSB.

devpk dev_avg dev_pkavg   

Sig. strength plot:
Waterfall view:
Or use scroll wheel & dragging on waterfall.
Speed:
Size:
View:

Toggle "Hide labels" if labels are missing.



There are currently ? user(s) on this WebSDR:      compact view

News:



- Berg-DX am 24.09.2022 ab 22:00 Uhr Kanal USB (26.975 MHz)

- CB-Bayernrunde Kanal USB (27.055 MHz) immer Sonntags ab 10 Uhr

- "Nachteulenrunde" Kanal USB (27.055 MHz) t├Ąglich ab 00:00 Uhr

-

Statistics:
Actual CPU utilization percentage is 1/4th of the value shown above.

? devpk dev_avg dev_pkavg freq???