Welcome to the version 3 upgrade of the KFS WebSDR, located six miles south of Half Moon Bay, California USA.
This facility was established by Craig, W6DRZ (sk) and is maintained by a group of local and remote volunteers.
To read about the new features of this upgrade, click here.
A complete technical description, operating tips, updated propagation information, and a donation opportunity
can all be found on the ABOUT page.
More information on the worldwide WebSDR project can be found on www.websdr.org.
An outstanding alternate system in the Western USA is Northern Utah WebSDR,
North of Salt Lake City.
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.
USB CW RX:Check box, or put ?usbcw in the URL for USB CW reception.
CW uses a center frequency of 750 Hz and LSB by default.
PassBand Tuning (PBT):
Use buttons to select BW/mode or drag passband edges on frequency scale. PBT/IF Shift by Weert Websdr.Logbook: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).
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.
devpkdev_avgdev_pkavg
Audio recording:
Recorded audio includes any DSP filtering, Notch2 or High Boost. Your browser may not support downloading the recording; Try it anyway, but if it doesn't work, please try a recent version of Firefox, Chrome or Opera.
Audio channel:
Left
Both
Right
Sig. strength plot:
Waterfall view:
Or use scroll wheel & dragging on waterfall.
Speed:
Size:
View:
Toggle "Hide labels" if labels are missing.
Statistics:
Actual CPU utilization percentage is 1/4th of the value shown above.