--- 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 Washington DC Area SDR HF radio receiver system maintained by NA5B, Mehmet, e-mail The web site:
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
More info about the WebSDR project can be found on Other SDR's: UTAH UT - KFS CA - K3FEF PA - NY4Q GA - N4DKD AL - W7RNA AZ

Thank you to AD8AE, K1LWC, WD5GWC, AB3VN, W5AWG, W7HB, KN4VV, N4RLI, KZ3AB, K4NNK, WN3F, W2QL, KM4OBL and XE1RK for their donations.
* A high stability central local oscillator has been installed for all sdr's for better frequency stability. (19 May 2019)
** This WebSDR is compatible with Pocket RxTx App for Android (available in the PLAY STORE) for more info: YO3GGX, Dan
This site GUI includes some features by PA3FWM from University of Twente, Utah, Topband, Poland Nowy Sacz and other WebSDR sites.
Special thanks to the folks at the Northern Utah WebSDR for providing the DSP Noise Reduction function!  more info

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  Please join Washington DC NA5B WebSDR FaceBook Group  >>>  WASHINGTON DC WebSDR FB Group
  A new FULL WINDOW, DSP Noise Reduction and a 2nd Notch Filter function are installed.   more info      0 - 30 MHz   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. [? / ?]

Waterfall view: Full window

Or use scroll wheel and dragging
on waterfall.



Sig?dBm PK?dBm N?dB SNR?dB
Mute Squelch Auto-notch Notch-2
DSP Noise Reduction: High-Boost
GAIN CONTROL: automatic manual

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

Signal strength plot:
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.


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** Visitor window added on 20 Dec 2017 **