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.

Site changes for new WSPR FST4W modes

Since around version 2.1.1 wsjt-x has been uploading a `mode` value that WSPRNet has not been consuming. With the advent of new FST4W quasi-beacon modes we will now consume that value.

Going forward we will process the `mode` according to 4 values:

  • "2"
  • "15" for the current WSPR modes -2 & -15
  • "5
  • "30" for the FST4W modes 300 & 1800

This change applies to the manual upload too, i.e. WSPRNet will support an 11th column `mode` which can be one of these above 4 values.

[From Admins] Map issue -- a fix of sorts

The issue with the Google Maps is related to the change Google made on July 16th, 2018 that severely curtails the free API limits. WSPRNet will be transitioning to an alternative mapping solution as soon as possible.

In the interim I have added a new field to the User Profile form for storing your own Google Maps API Key, if you want to get back to the way things were. You can get your own API Key by following the link below and I would strongly encourage you to read the Q&A down the page.

24/06/2021 21:04 loop
24/06/2021 21:22 20m vert
24/06/2021 21:34 loop
25/06/2021 05:59 20m vert
25/06/2021 06:26 loop
25/06/2021 12:46 20m vert
25/06/2021 13:54 loop
25/06/2021 16:14 20m vert
25/06/2021 19:50 loop
26/06/2021 15:10 20m vert
27/06/2021 13:31 loop
06/07/2021 05:50 20m vert
07/07/2021 18:10 loop
13/07/2021 13:02 20m vert

Hello Fellow WSPR Enthusiasts

VR2YAK will be conducting from today onwards, 5mW wspr test transmissions on either 30 and/or 20m during the local greyline.

Please listen for these signals if possible. If received, reports are welcome with info on the antenna you were using, height above ground level and orientation please.

Many thanks and best 73


I now have an FT-991 and it is set up with WSJT-X v2.4.0

First WSPR TX today.

Hi all.
I am running a Summer Sale fora few days so if you want to get a standalone WSPR transmitter this can be a good opportunity to do that.
Check it out at

THE SALE IS OVER, thank you to all that participated!

An X1.5 solar flare on July 3rd, 2021 at 14:29Z which affected most of NA, EU, SA, and AF reduced spot counts by 80-90% in the minutes following the event. Spots counts had returned to normal about 20 minutes later. This resulted in a 15-20% drop in the hourly totals.

For 24, 28, 50 MHz I have rear half of 10m 4 ele yagi (so just 2 elements) sitting flat on my garage roof. Boom is pointing south. There are various metallic items very close to yagi outside and inside of garage roof. Fed from Zachtek Desktop WSPR Tx (approx 200mW).

Good evening, I have just joined WSPRnet and found no map ? any ideas,

I've been running a couple of wspr beacons, Sota Beams wsprlite and wsprlite flexi, for several years and marvel at the places from which my signals have been reported. I would like to return the favour and become part of the reporting network, but I'm a complete newby as far as reception goes. Can anyone point me to a place where I can be instructed, in words of one syllable how to set up and run such a system, using a dedicated receiver if possible. I have a raspi 2c and several standard computers using windows 10, one of which dual boots with linux mint.

Based on the results shown By WSPR , have you ever used the numbers shown to calculate and improve a transmitting Antenna? Do you know of any examples as I am looking for anything to learn from - cheers

QTH temporarily changed to Amrum, JO44dq.

Problem with 4 digit locator solved. Everything works as designed. A look into the WSPR User Guide 2.0 did help :-)

Since a couple of days I'm located at the island of Amrum and am testing my little beacon. The power is 0.05W. At the moment I'm having problems with the GPS module connected to the beacon as it only transmits 4 digits of the locator - but I know, it's possible to transmit 6 digits. Today (06/07) I transmitted the wrong power and again only JO44 as locator - even though I updated the code of the beacon.

Will continue testing...

Just found a Ultimate2 QRSS kit from qrp-labs in my drawer, power it up and it works!

Modified the Raspberry Case to allow plugging the module with extenders off the Pi.