The 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. The software is open source, and the data collected are available to the public through this site.

In response to popular request I have made my compiled binary version of WSPR for Linux available. The program has been compiled on Xandros Linux similar to that used by Asus on the Eee PC. The user interface has been optimized so that it fits the 800 x 480 display of the original Eee PC, which I own. Some of the fonts have also been changed so that they are easier to read.

I've been asked twice in the last 24 hours, if 7038.6 was the official WSPR frequency
here is my answer:
Although it is far from being ideal (mainly due to Pactor BSS's) we choose this frequency after several tests with 7L4IOU, mainly because, the JA's are not allowed to transmit digi above 7043. It became "de facto" the center of activity, thanks to the participation of several stations from the region 3 (ie VK/ZL)


After about one week of trying, it was last night when I finally saw my call in the spots list in the 40 mb. I started in the 30 mb but my homebrewed equipment failed to produce a clean signal in thet band, so I had to switch into 7 MHz. Not too many stations there and I spent some nights without any spots. What I finally did yesterday evening, was that I selected my tx frequency at the bottom of the band and it seemed to improve the situation. I had already triple checked just about everything, even the antennas being used.

I am adding the plot of this morning 40m test, involving VK7KRW (RX), DG0OPK and myself... (TX).
We were both using 5W; DG0OPK uses a G5RV at 4m AGL and I am using a ground mounted 17.5m vertical (tuned with an AT130 auto-tuner).

Please see forum topic "WSPR-DB data vs VOACAP model" for more details, comments and plots.

For those who are interested to compair antenna performances (TX/RX) over a long period using WSPR, and who own an ICOM transceiver, my friend F5LEN wrote a little software, which allows to switch TRX antenna 1/2 according to a predefined timing... (of course you need a TRX with 2 ants ports; ie IC756, 7800, etc)

Hello all.

I discovered this web site and mode via a link from the "PSK Reporter" part of the ever-improving Ham Radio Deluxe suite of programs.

Having been interested in propagation since I was a teenager, 30+ years ago I am finding this mode right up my street.

At the time of writing the difficulty for me is to ensure that I can generate WSPR signals at an acceptably accurate power level (I have opted for half a watt) whilst still providing reliable triggering of my transmitter.

I have just succeeded in compiling WSPR for Linux. Hurrah! I feel like someone who has been lost in the jungle for two days and has just staggered out into the daylight, bruised and scratched but happy at what I achieved. But the experience is the ultimate proof that Linux will never succeed as an operating system, except as a plaything for computer hobbyists. It has taken me several hours to achieve what Windows users could do in about one minute and a few mouse clicks.

Just discovered the JT65 Reverse Beacon mode (thanks Gary K7EK). After 2 days of activity here is a quick summary:

I am running a 1KW ERP beacon on 144.488MHz for a few hours today. It is directed to 140 degrees currently but can be moved. I can increase the ERP to ~ 40KW for long range sounding tests if required.

If you want to do a test please contact me direct at .

regards de Russ g4pbp

Please remember that WSPR is a ...EDIT Weak signal... ( DELETE QRP)... Mode. and has allocated frequency slots for everyone's advantage.

Edited 3 December 2008 for the purists. Some of us have brains that think of QRP at the RX end too. Yes and I once spoke of adding an extra Bit of Data when really it should have been a Unit, am I not awful?

There are problems on both sides of the Atlantic with relatively QRO WSPR signals in the QRP QRSS slot.

The following from one of the International Grabber Network Stations says it all.

For the Grabber compendiums mentioned try:-

Attached is a screen picture, showing K7EK signal received in my QTH on 40m.
It is not obvious on the WSPR screen, but on spectrum lab it was difficult to recognize a WSPR signal, as it was completly frequency spread out.
Of course no Decode...
Strongly suspect the effects of polar-flutter...

Soon after I got interested in WSPR, I was interested in the idea of running it on my Asus Eee PC netbook. Partly because running a desktop PC and an Elecraft K3/100 all day was consuming a lot of power just to generate a 1W signal. And partly because in any case, I was interested in using WSPR to test the effectiveness of some portable antennas, which needs to be done out of doors.

The attached graph shows the graphical 40m path analysis for the stations ZL2TLD (RE79tb) and F6IRF (JN35au) for the period Sept28 to Oct09 2008. The path is roughly 19000 kms for the short path and 21000 kms for the long path. (.../...)

It would find quite useful if you could insert somewhere on the page a small window showing the real-time solar data.
There is a sophisticated example on ON4KST 6m page. Don't think we need that level of sophistication, but just:
- Solar Flux
- Kp
- Ap
- SSNe (Effective SSN, derived from Ionosonders measurements - The SSNe may take a negative value. This is the case at the moment while the SSN is 0 for several months, thus not vy useful to estimate the day to day condx...)