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.

Time is critical running WSPR. For those operators in The Netherlands and surrounding countries here is a list of some Dutch NTP servers with low ping, which you can add and set as standard to your Windows internet time:

I am using the Ultimate3 kit with my Alex-loop in house.
I make 275 mWatt om 30 meter.
I get reports from a lot of stations in Europe but also the USA.

73 Harry PA3CWQ

My longest DX to date:

2015-03-11 19:58 VK4XJB 28.126127 -23 -1 QG52xh 5 SWL-K-FN41 FN41jp 15825 57

Receiver setup:
- SDR# receiver software
- SDR dongle (RTL-SDR Blog Brand R820T2 RTL2832U)
- 10m horizontal dipole strung in attic
- RG-6 quad-shield feedline
- FM trap (Radio Shack 1500024)
- ferrites at USB and antenna inputs to SDR dongle, and at antenna feedpoint (Fair-rite 2631803802 1-300MHz 31 round cable core)

After some discussion it seems the Day/Night overlay on the Maps does in fact work . It still states "currently not working" however.

I was listening 630m all night long with some success:

2015-03-10 04:22 WG2XJM 0.475775 -27 0 EN91wr 5 F59706 JN07th 6206 54
2015-03-10 04:26 WE2XGR 0.475797 -25 0 FN31ls 10 F59706 JN07th 5720 57
2015-03-10 04:06 WE2XGR 0.475797 -26 0 FN31ls 10 F59706 JN07th 5720 57

G3XKR heard same stations but in a wider time range (03:04-05:28z).

73, Patrick

Just ordered a QRPLabs ULTIMATE3S kit. Only 20mtrs until payday. Hoping to order the relay and the LPF filter boards for 40,30,17 and 15Mtrs.Plus the GPS unit
I'll be running it all through my Hustler 6-BTV.
I've also ordered some more BF170's for the higher output.

Thinking too about using the VELLMANN voltage regulators to power the processor, GPS and the PA section (At a higher voltage,,,say,,,12v) I can then use a 13.8v PSU that is in the shack to run everything.

Testing with a scope on a dummy load I found my Ultimate3S has only been producing 20mW rather than the 100mW I was expecting. I added an extra transistor on the power amplifier but did not succeed in increasing the power. Now (back inside the house and) attached to the G5RV I only got one spot yesterday and one the day before (same station Jorgen OZ7IT in Denmark and roughly same time). I wonder if drift is also a problem? It should be OK as calibrated by GPS.

The last 2 months have been very active for WSPR. Excellent server uptime and improved signal decoding (K9AN decoder) have really helped the spot numbers grow.

January 2015 was the first time there was over 8 million spots for the month. January had 8,037,932 spots. Prior to that, the closest we came to 8 million was in March of 2014 which had 7,917,817 spots.

The service provider where this server is hosted has planned a scheduled downtime around 2015-03-08 1800Z. If all goes well, the outage will be brief, but I wanted to let everyone know.

I am using a 5m fishing pole antenna in the garden with three radials. The Ultimate3 and MJF manual tuner are in a waterproof laptop bag on my lawn. It should give me a more uniform radiation pattern than the horizontal dipole I was using before.

My old U3 was set to extended WSPR which I understand sends the six character Maidenhead locator. When I started transmitting with my new U3S beacon I forgot to configure extended WSPR but the WSPRnet database still shows a 6 char locator. I notice some have a 4 char locator. Does the database somehow retain the locator even if only reports of 4 char locators are sent?


Bill M0WLH


I am not sure if somebody already did this, but here it is. I have been sick at home for few days, so i have decided to convert the excellent port of the WSRP decoder in C by Steve(K9AN)
so it can be compiled in Windows, under the free version of Visual Studio Express.

Then it is just one command like executable and two dll's that need to be dropped in the Wspr-x
directory. I did very little testing, so it might be buggy. Some rudimentary logging has been added to track problems to a text log file.

Finally got the U3 up and working correctly with GPS stabilization. Running with a severe handicap, though: my 40M dipole under the eave of the house. We'll see if somebody out there can hear us. Running a 10-minute frame starting on the fours.

After receiving a Raspberry Pi 2 from Element 14 Australia, the first thing I attempted was to compile and run WSPR 3.9 with a Signalink USB Soundcard (IC-7000 with a dipole converted from a broken G5RV). I followed the instructions of G4FRE ( except for an updated URL for the SVN repository (and using revision 2840 of the WSPR code).

Last night I achieved the farthest spot so far for me on 630m:

2015-02-27 11:40 WH2XNA 0.475722 -27 0 CM97ag 0.5 WE2XPQ BP51ip 3302 334

Many thanks to KL7L / WE2XPQ for pulling my signal out.