WSPR Quadrus SDR

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WSPR Quadrus SDR

What is WSPRNet?

In my last post I’ve introduced the WSJT receiver software and mentioned WSPRnet.

Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT’s MEPT_JT digital mode to probe radio frequency propagation conditions using very low power (QRP/QRPp) transmissions.

WSPR Quadrus SDR on WSPRNet

Registered user can log in to the site, and their client software will send automatic updates on the currently received radio stations to the database. The connections are visualized on a map. Again, thanks to Andy, HA6NN, we have some pictures about the stations he was receiving with the WSPR Quadrus SDR.

Connecting WSPR Quadrus SDR

I’ve used the virtual audio cable connection in this experiment as well in order to send audio samples from the SRM-3000 SDR software of the Quadrus SDR platform to the WSJT software.


In this post, you see an example of using Quadrus SDR with external software connected through a virtual audio cable. The setup received some DX stations with the DRU-244A SDR hardware, which has enough sensitivity to receive signals from around the word with a simple wire dipole antenna.

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3 thoughts on “WSPR Quadrus SDR”

  1. SAGAX DRU-244A is able to receive any kind of signal in a rather large part of the radio frequency spectrum. The art of identifying of almost countless modulation modes can be made easier by using communication software. Beside John Taylor’s WSJT family, one of the most remarkable ones are MixW and some others from the products of Nick Fedoseev UT2UZ. There’s another workshop in Japan, where Makoto Mori JE3HHT has made another collection of his software, i.e. MMTTY, MMVARI, MMSSTV. It’s well worth mentioning Andy Smith M0VKG, the author of FLDIGI. I have tried and used almost all of them and even more, like WINPSK, RCKSKIMMER,etc.
    You can find a signal identification guide at

  2. I have tried DRU-244A connected with a new remarkable version of the aforementioned WSJT oftware family, the WSJT-X V1.3. You may use a new beta release V1.4 of it which passes the received spots to <a
    Last night I used the beta release when the software collected a huge number of spot information which may be seen in a 396 MB video if you look for it at Youtube. (Just search for my name.)
    In the list there are radio station callsigns from all over the world including Hawaii, Australia, Kuwait and mainly from the American continent.
    A detailed User Guide can be found at the Princeton website of K1JT.
    WSJT-X can be used for two-way digital communication as well.

  3. It”s quite unpleasant for me how difficult to catch an English language short wave broadcast station. In the age of sophisticated modulation modes i.e. DRM (Digital radio Mundial) you can find a lot of stations in the long established broadcast bands but unfortunately you can’t hear the Oxford style -formerly also named BBC English after the excellent pronuncation. BBC must have such a narrow budget that is not enough to find some money for a daylight transmisson frequency and antenna for Central and Eastern Europe.
    What a pity!
    I must have been listening to China Radio International instead, this afternoon.
    Otherwise there are a paradise of DX hunting of this kind in the short wave broadcast bands. It’s really exciting to find distant stations transmitting from exotic countries.
    You may find a lot of information at called the Short Wave Heaven and surprisingly called Bulgarian DX Blog which is really full of treasure, including maps and even information about solar activity.

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