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.

Thanks to all of pointers by K1JT, W1KBX, G4KLA and others
I finally got it working under OS X.

But I figured there had to be an easier way so I created a script to download a good gfortran, all prerequisite packages, compile and install WSPR in a single process.

1 - get and install xcode from

2 - download my somewhat hackish install script from

This site has now operated more-or-less unchanged for 2.5 years, and in the process it has managed to collect a huge amount of useful propagation data. I remember it being a big deal when we hit 1 million spots, then 5 million, .... By the time we hit the 3rd anniversary of the introduction of WSPR, we will have well over 50M spots, and that's at least an order of magnitude more than I ever imagined.

I'm now working through some design ideas for a next-generation implementation of the site. Part of this will almost certainly involve separating the spot database implementation from the community/social aspects of the site. They can certainly be mashed up to provide an integrated experience, but I'm pretty sure the right thing is to divorce the underlying technologies and server environment. Personally, what I want to spend my time developing is the new data store and query interfaces, and I will post more info for feedback as I refine ideas and tinker with more scalable technologies. An important part of this is getting the right APIs in place to feed other analysis, curate data, provide monitoring/notifications, etc.

I would be very interested to hear from others who are particularly interested in moving the community aspects of wsprnet forward. I initially did this site in drupal because I had some experience with it and it was easy to deploy, but it's a bit clumsy for some of what we do (e.g., there are far better discussion forums out there!). The "chat" page could be rebuilt on twitter. You all probably lots of other ideas about what sorts of tools we could have to interact better.

Anyway, please let me know if you want to be a part of design/implementation/management of the next generation of WSPRnet.

Hi All and especially Alex !

I just finished my Softrock RXTX Ensemble Transceiver and did some local tests. I tried to receive myself, which works quit good. I was really impressed as i saw the Call of Alex UA3ARC from KO85 (-26 dB) on my RX Screen while listening to 40 Meters with only the elecraft DL1 Dummy Load (which i built myself from the schematics) connected. This is real fun.

73 de Oliver DL6KBG, JO61UB


Transatlantic contact on 2m with WSPR, possible or not ?

After some testing in WSPR on the HF bands with very low power levels, I wish to share with Ham located on the East Coast from Noth America, particularly from NF Canada (VO1)
During 2011, I will relocate the station to a secondary QTH, who will be located a few meters from the sea, on the western tip of Brittany. The idea is to implant a HF contest station for SOAB.
But why not take advantage of this excellent take of to let it run 2m WSPR beaming North America!

You can visit my website:

This evening I downloaded and installed the WSPR 2.21 r2286 beta Joe had released a while ago. Setup of the new feature couldn't be easier. (see attached screenshots) I'm running it on Windows 7 64-bit connected to my Yaesu FT-857D switched to my Butternut HF9V, 5watts.

I set the transmit percentage at 20% except for the 160m band where I am listening only (I have a great antenna for 160m but I can't use it to transmit on the other bands) and 6m where I have it set to 50%.

Just rtying to get the software to work with my IC-7200......

Noticed that the latest freq hopping wspr software has an 'rx noise' floor ~15dB higher than v2.0, and also that it has crashed after a few hours with a Windows run-time library error. V2.0 was very stable on my XP machine.


It would seem the Hopping software is causing the reports uploaded to the web to get the band wrong my station is doing and G4KLA any other noticed the problem? 73's Bob

see also PSKmail page:

73 Rolf DKK4XI

I'm tweeting latest reciprocal spots for g4cui @Greg4CUI

Dear DK8FT,

I am comparing the efficiency of my antenna system with yours DK8FT. For that reason I would like to know which antenna you are using in the 40, 30 and 20 m band.

Many thanks!

73, Mike DL1MMK

My signal from Boomerang was copied in Australia on 20 m. Nothing is impossible with WSPR..............

I would like to have a lot more QSO with WSPR with WSJT7, I use the 40mts 7.076.0 mhz Freq from 13:00-17:00 UTC , 20mtrs 14.076.0 Mhz. 17:00-20:00 UTC. Then back down to 7.076Mhz 01:00-07:00 UTC Everyday of the week. NY7U

A beta release of WSPR 2.21 r2286 has been posted at:



As in r2283, this version includes a "Coordinated hopping" mode in which the selected band is determined by the starting UTC minute of a Tx/Rx interval:

In response to a recent Facebook (social media is good for ham radio!) post by N2GJ & the recent QST article, I thought about giving WSPR a try.

My only current computers are Macs, so I went about trying to compile wspr, but no joy there – I keep getting compile errors that seem to be pointing to f2py.

Anyway, I finally got it working by running a Ubuntu Linux session in a Parallels window.

WOW, pretty amazing what a few watts could do into a lousy antenna.

Rig :FT-450D
Tuner: :MFJ-929
Antenna :Slinky dipole in attic facing 045/135. Dipole is made with 2 Slinkys on either side stretched to 15 feet on each side.
Interface :SignalLink-USB

If you have been testing WSPR 2.2 with its frequency-hopping feature, please upgrade to revision 2283. Direct links for download are:



This version has several new features:

1. A checkbox labeled "Coordinated bands" is now available at the bottom of WSPR's Frequency Hopping screen. If this box is checked, the first-choice selected band will be determined by the UTC minute at which a 2-minute sequence starts:

UTC Band
Minute (m)
00 160
02 80
04 60
06 40
08 30
10 20
12 17
14 15
16 12
18 10

20 160
22 80
... etc

The sequence of ten possible bands repeats three times each hour. If the first choice band has not been checked as an active band, a random band choice is made among those that are active.

Decision whether to receive or transmit is purely random, using the "Tx fraction" for the selected band.

If all WSPR stations using frequency hopping use the "Coordinated bands" option, a sizable group of us will move together from band to band. During any particular sequence, something like 20% of the stations (depending on their Tx fraction settings) will transmit, and the rest will receive. The average number of spots will be much larger than that if band selection is random. If a band gets too crowded -- say, if you often see more than 6-8 stations in one sequence -- you should probably reduce your Tx fraction for that band.

Потрясен возможностями!

I don't know what this noise is but I made a short video of it and how it looked in my PowerSDR panafall. It was on 30 meters.and was stronger up the band.
Here is the youtube URL

IF you know what it is please comment this was in between 22:00 and 23:00 UCT December 5th 2010.