N A 5 B    W e b S D R   R E C E I V E R   S Y S T E M
Welcome to NA5B WebSDR receiver in Washington DC Area Operated by NA5B, Mehmet - QTH Locator: FM18JS
This receiver covers VLF/LF/MF/HF - 160m, 80m, 40m, 30m, 25m, 20m, 15m, 11&10m Amateur Bands (Atomic Clock, Data, Lightning, Beacons, AM broadcast & CB).
Current system brief description; Antennas: Active Mini Whip - Multiband Dipole & Cuschcraft R-7 Server: 64 Bit Linux (Debian) with fiberoptic gigabit connection.
RTL-SDR dongles and homebrew upconverter, bandpass filters. For VHF-UHF SDR click here:    0 - 30MHz coverage: NA5B KiwiSDR
For more info about the WebSDR: Other SDR's: UTAH UT - KFS CA - K3FEF PA - NY4Q GA - N4DKD AL - W7RNA AZ - Maui, HI

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 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.
AMAZON RTL-SDR V3 Dongle full kit  RTL-SDR V3 1PPM TCXO       RTL-SDR V3 Dongle only RTL-SDR V3 1PPM TCXO
 Please join FaceBook Group  WASHINGTON DC WebSDR FB Group       NA5B KiwiSDR coverage 10 kHz to 30 MHz (limited to 4 users)  NA5B KiwiSDR
Allow keyboard:
j k ← →freq. down/up (+shift/ctrl/alt faster)
u l c a fUSB, LSB, CW, AM, FM
W wfilter wider/narrower
z Z ^Zcenter/zoom waterfall
genter frequency
b Bchange band
m V vmute, volume up/down
t TVFOs: toggle A/B, set A=B

Loading waterfall... Please Wait.
HURRICANE WATCH NET  Main:    Secondary: 


FILTER:  ?kHz @ 0dB; ?kHz @ -6dB; ?kHz @ -60dB. [? / ?]
PassBand Tuning (PBT) Control:


Waterfall view: Full window

Or use scroll wheel and dragging on waterfall.


Solar Activity Monitor:

Solar X-rays:  
Geomagnetic  Field:  



Sig?dBm PK?dBm N?dB SNR?dB
Mute Squelch Auto-notch Notch-2
Audio out: Left Both Right
Noise Reduction: OffMax High-Boost

GAIN CONTROL: automatic manual

E-Field @ Washington DC Area (VLF 0-20kHz)

Signal strength plot:
Logbook:    Call of station that you hear: Comments, if any:
Note: time, frequency, your name/call, and DXCC information are added automatically. View the last 20 lines of the logbook, or the entire logbook (ctrl-click for new tab/window).

Station information: Lookup in databases  
This WebSDR is currently being used by ? user(s) simultaneously:      compact view

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


NA5B HF Server Statistics:

Flag Counter
** Visitor window added on 20 Dec 2017 **