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.

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...)

Did an interesting test today to compare the performance of my 20m multiband dipole and my MFJ magnetic loop. Both are in the attic of my very small detached house, the dipole is in the apex at a height of about 8m above ground.

I have written an article about WSPR and how to get started. I thought I'd do it while it was fresh in my mind!

You can read the article, WSPR - Distant Whispers, on my website. I hope it helps a few people get interested in this mode, so we can see spots from a few more new places!

Just got started using WSPR, after it was mentioned to me in an email from a fellow Elecraft user, Trevor, G0KTN.

I think I'm going to love this mode. Being home all the time, but usually too busy to spend much time on the air, and with one of my main interests in radio being just seeing how far a little RF will go, this is a great way to see where I can reach with little effort.

Starting tomorrow at 0z is the CQWW RTTY. Of course it won't affect 30m users, but 80, 40 and 20m are going to be full from edge to edge (and even outside the dedicated digital segments).
Rather than complaining about it (I am a contester myself !), I think it is a nice opportunity to focus on bands where the activity remains low or quasi inexistant: 17m during daytime and 160m at night.

Thanks to K9JKM and KF6KYI my amsat buddies in peaking my interests to try out wspr. Is very interesting.

I am building a ham shack at my new house so for now my shack is a folding table that sags in the middle, ha ha. Gear includes IC-706MKIIg and AT-180 coax tuner feeding 100 feet of rg-8 mini into an ALPHA DELTA DX-CC multi-band dipole sloping down at 45 degrees and folded over on itself about 50 degrees to face to the east.


I obtained the go ahead to run an Unattended Solar Powered Test on 10.140073 MHz during the summer months.

My Multimode MEPT recently completed 62 days of trouble free unattended operation. During this time daily spots were posted proving its constant signal. QRSS Knights posted captures of the visual modes and it appeared on the Grabber network. In addition I personally viewed the signal from up to 1000Km away.

This proves the stability of what I shall call the SM6LKM method of setting voltage levels for the individual tones.

After initial successful experiments, my station seemed to go dead. Receiving but not transmitting.
Was transmitting at tiny power - seemed to be a milliwatt or so.
Finally tracked down the issue. I had changed from my 'experimental' data cable to my 'production' cable. The experimental cable was using the 1200bps pin and the production cable was using the 9600bps pin. Changed the rig (FT857 and FT897) to DIG mode rather than USB and all FB now. QRV again.

de Glenn, ZL2TLD

FT857 or FT897 on 30m into 40m Windom via ATU until I put up a dipole for 30m. Antenna is resonant on 40/20/10 if anyone wants a sked. email address on