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.

Tomorrow, I will be making a change which will redirect all access to the wsprnet community drupal web site (this site) from to You may need to login again to create a new session. This is in preparation to move the interactive user site to another server to improve performance and separate that functionality from spot reporting.

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.

Today my WSPR transmitter from Zacktek arrived and it took 10 min to be on air with it.
I was really surprised how many stations could hear me within the first minutes, even on 15m.
The station will be running on my yagi antenna 24/7.

73 de Roland, DF3LZ

To test the theory that some duplicated bad decodes are the result of multiple strong stations being received, I looked in the wspr database for VK3 transmitters on 2m over the past month.

I found 29 VK3 callsigns that were hybrid decodes (3 different stations transmitting, resulting in 4 different decodes).

I ran 4 instances of wsjt-x - one as a receiver and
the other 3 as transmitters (through virtual audio cable). The transmitters were at 1480Hz, 1500Hz, and 1520Hz - this created several signals across the entire waterfall every 20Hz.

It has (coincidentally) been a year and a week to the day since I joined wspr, and I found this blog button.

I have to say that I have thoroughly enjoyed tinkering with, and learning from wspr as I have built and tested many wire antennas over the past year.

Cheers to wspr!


Just went on WSPR with my TX-500 for the first time. Using Digirig sound card that I just received and Chameleon vertical at 13 feet. QTH: FM17ta, southeast Virginia.

Merry Christmas!

My Christmas WSPR outing for the QCX+ on top band was fun. I will be downloading the DB to analyse the signals, but so far so good. I can see drift as I'm not locked to GPS yet but results overall very good.

I'm currently static maritime mobile near Goole Docks UK. (IO93) just off the tidal rivers Ouse and Humber, which leads out to the North Sea. I don't think there is much salt water in the marina as it's behind Ocean Lock and a little inland by about a mile on a freshwater river.

Hi i am happy to see that my small wspr signal has been recived in canada .

2021-12-17 21:56 OZ1KVB 0.475704 -22 0 JO44vv +20 0.100 VE9GJ FN77ha 5077 3155 WSPR-2

vy 73 de oz1kvb

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

The Sale is over, thank you all.

If anyone knows a WSPR server staff member that could change my WH2XND grid location back to DM33XT it sure would be helpful!
DM33XT is approx. 20 miles due north of Phoenix AZ. map shows Im located in Tonapah AZ.
Making changes in my WSPR account does nothing.
Thank You, Ron WH2XND/NI7J.

My TAPR 20M WWSPR transmitter putting out 1/10th Watt is no longer being heard by anyone. This seems to have happened only for the past day so not sure what is wrong. I use a 20M Magloop and it is returning an SWR of 1:1 so I'm inclined to think it is not the antenna but possibly only conditions in Western Australia.
Any ideas?
Thanks, Merv VK6BMT

With the help of the site, it becomes possible not only to listen to the broadcast from remote SDR receivers, but also to process the signal on your computer.
First, you need to install a virtual audio cable on your computer, and in the browser a special extension for redirecting the audio stream to this virtual cable.