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.

By Anthony F4GOH and Christophe F4GOJ.


Received my WSPR and GPS kit yesterday in the mail from Japan. Will be sorting through the parts and instructions and aiming at getting it going soon. Starting band will be 30 meters.

The best nights on 160m are now in our backs, it’s time to summarize my RX Challenge season.
I logged 36 unique NA callsigns (39 in previous season) and I ‘m proud to publish the listing with power indication; 8 stations running QRPp !!


This afternoon from 13:30 until 16:30 UTC, I'll run with (10 Watts + 5 elements Yagi) to Caribbean sea direction on 50.2945 Mhz.

I cross my fingers for good luck.


EA6FG Op. Pep.

As of 04/19/2015 I will have a dedicated 100w 144Mhz and 70cm WSPR
station up and running. The 144Mhz station Yagie will be on azmuth
065 deg. and the 70cm station Yagie will be on azmuth 030 deg. I am
also monitoring for FM Broadcast signals form Spain and Portugal oo
80-90Mhz using a PCR1000 with a 8 ele. FM BCST Yagi. 73's Tom K4NAM

Charts of 80 meter and 40 meter WSPR Near Vertical Incidence Skywave (NVIS) spots SNR vs. distance
Clusters of spots in red were received during daylight hours. Those in blue during hours of darkness.
The antenna used was a thin wire 40 meter full wave horizontal loop at 6 meters above ground.

I have my U3S kit on line and can confirm it is transmitting in the shack. I also saw my call on in the 20meters section. What I do not know is where the signal is being picked up. I do not see anything on the map, I am still very new to this and have a lot more to learn.

During the past few months I have changed my WSPR station to being totally SOLAR powered. The old TS120S is driven by an old ACER "Aspire" 3620 laptop which is running directly from the SOLAR panel regulator off about 13 volts, so avoiding the necessity for an inverter for a 230VAC to 12 VDC Power supply unit.

John K3KQV wrote this night a new ligne to the historical datas of the record distance. Well done with 100 mw !!

2015-04-11 02:26 K3KQV 1.838076 -25 0 FN00 0.1 F59706 JN07th 6214 54

2015-02-19 06:14 W3TIM 1.838108 -26 0 FM18cl 0.1 G8DYK IO85te 5719 45
2015-02-17 07:12 W3TIM 1.838107 -25 0 FM18cl 0.2 F59706 JN07th 6260 53
2014-12-08 02:44 W1FVB 1.838014 -27 0 FN44ej 0.2 G8HUH IO81mg 4992 56
2013-10-09 02:34 W1FVB 1.838027 -26 0 FN44ej 0.5 F59706 JN07th 5467 59

A few users have recently posted questions about timeout problems when reporting "spots" to the server.

I have been working a little on fixing some of the problems with WSPR-X lately. As part of that effort, I enabled some debugging statements. One of them saves the processing time returned by the server when (my) "spots" are reported. This is the time reports that it used to just store the "spot" info in it's database, the network transit time is NOT included. I thought it would be helpful to share that info here.

I love WSPR.

what can be done to make this a contestable mode?

I am ready willing and able to help move this along.


A new record for me 16Mm, heard by VK2XN in Australia. Are some exceptional atmospheric conditions going on?

2015-04-10 16:06 M0WLH 14.097093 -23 -1 IO93ah 0.02 VK2XN QF59ar 16601 53

I have been slowly convincing a FT690R that WSPR is a good idea.
Having a 40Hz droop on your single is embarrassing to say the least. Upgrading the regulators supplying the main PLL is slowly helping and now down to less than 20Hz frequency drift, with receiving stations starting to decode my transmissions. One regulator to go!

Looking through my 20m activity and spotted this...

2015-04-09 20:44 G7EVW 14.097067 -20 0 IO94fv 0.005 VK2EFM QF56pn 16832 53

Well done G7EVW