WebSDR in Peterborough, England (IO92VO)Thanks to Pieter Tjerk de Boer PA3FWM for creating the WebSDR software!
This unique software allows one or more SDR receivers to be tuned by multiple users over the internet simultaneously.
More information about the WebSDR project including other online WebSDR's can be found on http://www.websdr.org.
Since Java version 7u51, Java applets need to be enabled for each site separately; see http://websdr.org/java.html for instructions.
Alternatively you could try Google Chrome as that seems to work OK or if you are using Windows 10 then the Edge browser works brilliantly.
- HP DC7900SFF Computer (2.8GHz Dual Core with 4GB RAM)
- Ubuntu 14.04 LTS Linux (64 Bit)
- NooElec R820T2 SDR NESDR Mini 2
- NooElec 'Ham it Up' V1.2 Upconverter
- Mini-Whip Antenna
- Clifton Labs Z10020 Filter with notch @ 1389KHz to attenuate the massive local signals on 1332KHz and 1449KHz.
- 22/09/2016 - Hard Disk failure in SDR server. Replaced and restored from recent backup. SDR Server back online at 1840UTC
- 22/08/2016 - SDR server back online at 1640UTC after a brief (20 hour) outage due to planned building works at the server location.
- 01/01/2016 - Deleted labels for several stations that have sadly left MW. Thanks to user 'Haze' for the information.
- 17/05/2015 - Made new server with expanded coverage (0-2.8MHz) with RTL dongle live.
- 24/04/2015 - Began tests on new server with expanded coverage (0-2.8MHz) on internal LAN.
- 15/04/2015 - After next server restart we'll be using the new name 'cambs-sdr.no-ip.org'
- 13/04/2015 - Updated all frequency labels. New labels based on data obtained from here.
- 13/04/2015 - Have put into place another DNS name for this SDR. The alternative URL is http://cambs-sdr.no-ip.org:8901/. This may well become the default in the very near future.
- 05/04/2015 - Added additional coverage to this SDR.
Originally we covered 100KHz-279KHz. This has now been extended to 850KHz.
Due to the slightly non-standard data rate (IQ stream) from the SDR you'll notice a frequency error of about 500Hz toward the band edges.
- 03/01/2015 - The following transmitters were switched off on 31/12/2014, thanks to user 'Haze' for alerting me:-
- 153KHz - Deutschlandfunk (DLF), Donebach, Germany
- 177KHz - Deutschlandradio (DLR), Zehlendorf, Germany
- 207KHz - Deutschlandfunk (DLF), Aholming, Germany
- 216KHz - Horizont+Parliament Radio, Vakarel, Bulgaria (Off @ 2200 UTC)
- 21/11/2014 - The SDR has been "off air" for a few days. I've been busy at work so it went unnoticed. I received an EMail alert from a user and promptly got it up and running again.
- 02/11/2014 - Unfortunately we are suffering QRM from an unidentified source.
- 25/09/2014 - Upgraded host OS to Ubuntu 14.04 LTS Linux (32 bit).
- 19/07/2014 - Upgraded WebSDR software to dist11. Thanks to PA3FWM for the update.
- 04/07/2014 - Reverted back to hostname g7jjp-websdr.no-ip.org.
- 02/07/2014 - Changed hostname from g7jjp-websdr.no-ip.org to g7jjp-websdr.ddns.net because the no-ip.org domain stopped working.
- 16/03/2014 - Added a ground wire to the Mini-Whip Antenna. This seems to have improved the receiver performance somewhat.
- 14/03/2014 - Installed Clifton Labs Z10020 filter which has provided a degree of relief for the overload problems caused by nearby AM BCB stations.
- 16/02/2014 - As planned the Mini-Whip antenna is now installed outside at a height of around 12 metres.
- 07/02/2014 - Mini-Whip built into Pepper Pot. I now need to install it outside on an insulated pole as high as possible.
- 29/01/2014 - A work colleague obtained a Pepper Pot container for my Mini-Whip antenna. Thanks JL :-)
- 27/01/2014 - Added a few frequency labels from http://www.eibispace.de
- 23/01/2014 - WebSDR online for the first time although with only a temporary antenna installation.
Since Java version 7u51, Java needs to be enabled separately for each website; see http://websdr.org/java.html for instructions.
on the frequency scale.
? kHz @ -6dB; ? kHz @ -60dB.
|Or use scroll wheel and dragging on waterfall.|
mute squelch autonotch
Signal strength plot:
View the last 20 lines of the logbook, or the entire logbook (ctrl-click for new tab/window).
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.
NOTE: There are two strong local broadcast stations on 1332KHz and 1449KHz.
Although I've taken steps (see station equipment) to minimize the problems they cause you will notice images at the sum and difference frequencies.