--- 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
This receiver covers VHF/UHF - 6m, Air Band, Weather Band and 70 cm (antenna is down and will be up soon) Current system brief description; Antennas: Homebrew
1/4 ground plane and discone Server: 64 Bit Linux (Debian) with fiberoptic gigabit connection and RTL-SDR dongles.
For HF BANDS click here: For the web site click here: Other SDR's UTAH UT - KFS CA - K3FEF PA - NY4Q GA - N4DKD AL - WCRC TX
More information about the WebSDR project can be found on
This site GUI includes some features by PA3FWM from University of Twente, Topband, Poland Nowy Sacz and other WebSDR sites.

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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.
Or tune by clicking/dragging/scrollwheel on the frequency scale.


Bandwidth tuning & presets:
? kHz @ 0dB; ? kHz @ -6dB; ? kHz @ -60dB. [ ? / ? ]
Or drag the passband edges on the frequency scale

Waterfall view: Full window

Or use scroll wheel and dragging
on waterfall.



Sig?dBm PK?dBm N?dB SNR?dB
Mute Squelch Auto-notch


GAIN CONTROL: automatic manual

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

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: (click below buttons to see more about listening frequency)
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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