This page may collect some information of users. This section explains what will be stored and what are your rights.
This service is provided as a hobby project and is free of charge for you. It has no aim to gain profit.
If you load this webpage from our Webserver the server will collect some data. For example your IP will be stored in the Server log as well as the page that was called, information about the data transferred and possibly the site were this page was linked from. This data is required to provide this service to you.
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The page has a chatting section below. If you use this chat section you agree that the information entered there will be stored until the next restart of the websdr service.
In case you enter your personal callsign or name or nickname in the respective field below you agree that it will be stored in the applications log file and will be shown in the public frequency list below as well it will be used in the chat field. If you enter data into the logbook you agree that it will be stored until further notice.
In case you have questions about the data that is saved about you please contact us via the email shown below. You have the right to request us to delete any personal data stored about you.
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This is a WebSDR receiver, located in Dresden, JO61VA51 It is operated by Norbert, DL4DTU and Mario, DH5YM, e-mail It receives the narrow band section of the 10GHz amateur radio band from 10368 to about 10369 MHz. The antenna is heading in north direction and does not have much gain but a relative large reception angle. Polarization is horizontal. At the upper end of the spectrum around 10368.9 you can find the local 10GHz beacon DM0TUD transmitting in CW-FSK (nominal 10368.885MHz). The equipment used is a Octagon OTLSO Sat LNB with crystal stabilization and a RTLSDR sampling the IF of about 618.5MHz. Please excuse some frequency drift since the LNB is located outside. If you are not sure about the exact frequency please calculate the difference of the displayed frequency of DM0TUD from .885 and calculate your real frequency with this delta value.
To check if clouds for scattering are available you can check out the RS map of Patrick, TK5EP. You can find it here:
Many thanks for providing this useful tool !

The mobile version of this page can be found here:

The aim of the WebSDR is to support the activities within the DUR "Dresdner UKW Runde". This is the name for the VHF/UHF/SHF activities in and around Dresden that were started in the year 1962. You can find some more information in german language here
Since 2008 there is a regular activity every third sunday of a month were the bands from 23cm upwards are activated. This activity is in parallel to the OK/OM activity. You can find the page about the DUR activity contest here:

NEWS 2016/12/17
Norbert has brought the PC back to life. The WebSDR works again now.

NEWS 2015/12/05
Now there is a antenna connected to the 23cm path. Its a bi-quad with reflector also heading towards north-west direction as the 3cm path. Currently the antenna LNA is missing. Therefore you might just be able to receive the local beacon DB0TUD. We will inform you once t he LNA is in operation.

NEWS 2015/06/14
WebSDR repaired. The Octagon LNB failed after 1.5years. Most probably the PLL is not working anymore. We mounted a new LNB. Next weeks we also plan to add 23cm. The band is already enabled and a rtlsdr is connected but no antenna is connected at the moment. We will inform you when the setup is ready for tests. The antenna will be a double-quad most probably also in north-western direction.

More information about the WebSDR project can be found on

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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

Frequency: kHz

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

? kHz @ -6dB; ? kHz @ -60dB.
Or drag the passband edges on the frequency scale.
Waterfall view:
Or use scroll wheel and dragging on waterfall.

? dB; peak ? dB;
mute squelch autonotch
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).

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

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.