4 Meter WEBSDR in Hertfordshire covering the London area

This is a WebSDR using a RTL Dongle receiver, Antenna Sirio CX-4-68 4M vertical, located IO91TP.
It is operated by M0XVT and G3VHH, for more information e-mail G3vhh@yahoo.co.uk
More information about the WebSDR project can be found on http://www.websdr.org.

Note: Unless your browser supports HTML5 audio, you need both Java and JavaScript enabled for this page to work properly. If you don't hear anything, probably Java is disabled or its version is too old (i.e., pre-1.4.2).


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View:
Allow keyboard:
j k ← →: freq down/up (+shift/ctrl/alt faster)
u l c a f: USB, LSB, CW, AM, FM
z Z: center/zoom waterfall
g: enter frequency

Waterfall view: Display Speed: Display Size: View:
Or use scroll wheel and dragging on waterfall.
Frequency:

kHz

Button + / -
FM
AM
SSB
* * *
12.5kHz
5kHz
2.5kHz
* *
5kHz
1kHz
500Hz
*
2.5kHz
100Hz
30Hz

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

Memories:
Mode:


Bandwidth:
? kHz @ -6dB; ? kHz @ -60dB.
Or drag the passband edges on the frequency scale.


[scale]
av: ? dBm  pk: ? dBm
mute squelch autonotch
Volume:
Signal strength plot:


This WebSDR is currently being used by ? user(s) simultaneously:      compact view

Chatbox:
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.

Beware of bogus http links that are being left on WEBSDR sites if in doubt ignore



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).



Statistics: