This is a WebSDR receiver, located 15km south of Sparti, GR, KM16FX, Laconia, Peloponnese Greece.
It is operated by SV3GCB, for news and status updates visit SDR's webpage, e-mail:
Antennas: 40m λ/2 inv.V Dipole | 80m λ/2 inv.V Dipole | 160m Inverted "L" (under development). The receiver is RTL-SDR.
Best viewed with . You have to click on "Audio Start". If you wish to configure your browser to NOT require the need to press this button and allow audio/video to start automatically on ANY web site, read this Guide.
Precious help from SV2AMK. Many thanks to Mehmet Ozcan NA5B for his excellent work with colorized waterfall and BAS ON5HB for his Airspy drivers. Alternative layout based on RW3PS's template, is also available. You can try it here.
More information about the WebSDR project can be found on
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g : enter frequency
j k ← → : freq down/up (+shift/ctrl/alt faster)
u l c a f : USB, LSB, CW, AM, FM
n : snap frequency to nearest integer (.00) khz
z Z x X : zoom waterfall / Rx signal to Center
w W : narrower, wider
b : change band
m V v : mute, volume up/down
t T : VFOs: toggle A/B, set A=B

Brightness:       Contrast:                Signal ? dBm       Peak ? dBm       Noise ? dB       SNR ? dB

SV3GCB Sparta WebSDR  is currently being used by ? user(s)     Mobile Version    Zoomed layout      Waterfall      Alternative GUI   

Frequency:   kHz.   Mode: ?
Please enter the frequency above.                   
Or tune by clicking/dragging/scrollwheel on the frequency scale.




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

Callsign lookup by
Callsign lookup by
QTH locator by QTH-Locator

Station information:

Mute Squelch High Boost
Notch1 Notch2


 DSP NR: More info here
  Waterfall view:  

Or use scroll wheel and dragging on waterfall.

  Bandwidth:        ? kHz @ -6dB; ? kHz @ -60dB.(? / ?)

IF shift:   

Or drag the passband edges on the frequency scale.
Audio buffering:
Audio out:

Gain control: AGC on Manual

Signal strength plot:


Call of station that you hear:


View the last 20 lines of the logbook,
or the entire logbook.

SV3GCB Sparta WebSDR  is currently being used by ? user(s) simultaneously      compact view

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.