G8HXT's TOP-BAND+ WebSDR v 5.382
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Location: Wheathampstead, SE England - IO91UT

CLICK FOR MOBILE VERSION
listener Id
current listener-count -- SDR occupancy -- < 1 min
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Band Labels Band View:
j k ← → : freq down/up
(+shift/ctrl/alt faster)
u l c a f : USB, LSB, CW, AM
z Z : centre/zoom waterfall
g : enter frequency
s e t : A>N, B=A, A↔B
Tune Step Δf

S-Meter
[scale]
S1 S3 S5 S7 S9 +20 +40 +60dB
min min 0 µ?V S(t) dBm S-peak dBm
SNR dB N-peak dBm
Sound
VOL
RECORD
VFO Freq
A: kHz
Hz 1k 500 100 10 VFO
Mode VFO A Bw
? LSB 2.60 kHz
SELECT PRESET Hz
Bw Trim
Memories mems ready
Display Controls
ZOOM
X1
OUT IN
STEP
FULL
DX


CURRENT LISTENERS: click the 'listener bubbles' to quickly tune where others are listening - see help       compact view
Please Click a Bubble like this:
o-
  o—example


• Constructive comments/sugestions are always welcome - for examples see listeners feedback.
• If leaving a bug report please check first the list of known bugs
• You are responsible for your own comments, please see chatbox guidelines - offensive content will be deleted and the author blocked


Signal and Noise Metrics/Plotter calibration: 6dB/S-point - ref. 1981 IARU Region 1 Technical Recommendation R.1
S3 S3 1.0 µ?V S(t) -107.3dBm S-peak -106.7 dBm
N-peak -108.7 dBm SNR 2 dB

READ ERASE UPDATE CONTENTS LABEL
CLICK DX CALLSIGNS IN WATERFALL TO LISTEN
UN-CLICKED DX - click calls in waterfall to tune stations
RECENTLY-CLICKED DX - click callsign above for QRZ.com lookup
DX-CLICKED HISTORY - smaller=clicked before last refresh. larger= clicked since last refresh
- opens DX Cluster from dxcluster.co.uk in a new window/tab
DX SPOTS CONTROL
DX SPOTS - LONG TERM LISTENING HISTORY

Band View Tune Bar
Waterfall Sound
Display Height Waterfall Speed
Control Panels & Displays Style S-Meter Noise Metrics Memory Flags on Waterfall

• Sincere thanks to the following listeners for their generous donations:
  FN, AnthonyC, MikeM, TonyD, PhilC, GM7ESM, Mart Ysselmuiden, F5LPM, M6TAS, GW8TRO, G4DJK, G4SJG, MD, AllanC, G0SXY, ScottP, 190919, NigelC, Volvo1984, Steve - M5MOW, G4NGV, BarryH, G4BIM, G0PWC, G3TDJ, GD0SFI, PeterH, NevilleP, MW0XAP, G0LUB, JeremyC, PhilipS, 2D0DRM, EI2DJ/G4GXN, G3UEQ
• Many thanks to Pieter PA3FWM (University of Twente) for creating the original WebSDR and for making it widely available so that other sysops could add to the network - Twente WebSDR

• I'm very grateful to Peter Goodhall (2M0SQL) at dxcluster.co.uk for the excellent API that provides the raw data used to generate the waterfall spots

• Thanks to Piotr at Nowy Sacz WebSDR for the inspiration to develop clickable entries in the listeners list and with whom I have shared some features of my GUI

• For the vast quantity of useful HTML, Javascript & CSS tutorials and examples - especially the inspiration for the NavBar and Tabs - www.w3schools.com

• For the original icons and permission to modify them -
Freepik from www.flaticon.com licensed by: CC 3.0 BY

Font Awesome Free 5.2.0 licenses by: Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT

• Last but not least, thanks to you for using Top-Band+ WebSDR. The system would not exist without its listeners

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