VHF and UHF WEBSDR in Hertfordshire covering the London area

This WebSDR is using RTL Dongle receivers on all bands, on VHF and UHF the antenna is Diamond V2000
The 4 meter vertical antenna is a Siro CX-4-68 4M , 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.

For mobile devices, you can access the mobile version of this websdr here

Sound issues: You may find that the following browsers: - Chrome, Firefox and Microsoft Edge have no sound click on this workaround link

New audio features - Notch, HB, DSP NR - developed by the folks at the Northern Utah WebSDR, for more info visit http://www.sdrutah.org/info/dspnr.html
You may find that when using the DSP feature you get audio drop out, this mighht be down the speed of your PC, also try using FireFox.

If you would like to donate to help pay for further improvement and upkeep of the websdr please do so below.

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).

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 http://websdr.org/java.html 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.
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
1kHz
* *
5kHz
1kHz
100Hz
*
0.5kHz
100Hz
10Hz




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 Notch1
Notch2 High Boost
DSP Noise Reduction:
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.



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: