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.

One of the many problems getting wspr and wsjt to compile on a AMD64 machine has been the need to use the G95 fortran compiler.
In the last month I've found on a .deb for AMD64.
I can now get wspr6 to compile, but still difficulties with wsjt7 and wspr.
The current OS here is Ubuntu 9.04 AMD64 which is due to be released sometime around 24/04/09.
The problems I'm encountering compiling wsjt7 and wspr are building the portaudio modules.

Really I am very impressed by the wspr. I am active of cw to 100 % and the truth is that I hallucinate when I see that month they are listening in vk with only 100mw with my dipole.
And everything with my old man FT817ND and one interface USB rig expert standard.
What I cannot fit still it is my newly FT950 not if it is for the DSP that is not a good ally for the use in wspr.

I've generated a short video of using VOAAREA to predict received signal levels for my 200 mW WSPR transmissions. Comparing spots from the WSPR database to the predictions has been very interesting and show a pretty good correlation.

You can find a writeup of my results and a link to the video on my personal blog at:

WSPR & Propagation Predictions

Feedback appreciated!

In the quest for a simple WSPR homebrew transmitter, I had to step through the process of generating WSPR without a computer.

My on-the-air transmission of last night (2009-04-06) has proven that it is possible. Given that a WSPR beacon emits a cyclic time-invariant signal, its sound can be pre-recorded and re-played endlessly with a simple MP3 player.

The special activity day events are due to start again this coming Wednesday 8 April – see top left corner of the home page for future dates.

This has been a very popular event in the past, generating a high level of activity on bands that normally attract a lower amount of interest. The last 17m event on 29 October 2008 generated 7199 spots in 24 hrs which just goes to show that there is a surprising amount of propagation around even at this rather depressed stage of the SS cycle. The last 40m event on 12 November 2008 generated 37,866 spots in 24 hrs.

I am currently testing on 1.843130MHz with a 2 transistor transmitter and PIC modulator, QRSS signal with WSPR every 10 minutes. Power levels from 1mW to 750mW. ** The indicated Power Level will always show 50mW **

Looking at the Activity page on here I see I am listed as active together with G8JNJ. How does the site know that I thought as I have had no Spot reports or reported any. Of course, I am checking my own signal and WSPR is uploading, no magic involved at all.

Sorry Guys, My 7 MHz reports over the past 24hrs or so, are actually 10 MHz reports,

73 - Franz

Greetings from EL86xv Florida
Info: on station here at NY4FD;
Radio: Icom 703 usually running 1 or 5 watts.
Computer: Compaq Notebook W98
Interface: Homebrew - Opto-isolator
#1 Antenna: Homebrew Vertical Dipole,22 feet end to end, mounted at ground level,
300 ohm Tuned feeder.
Homebrew Z match, VK5BR single coil
#2 Antenna: "Swapmeet $50 Dollar Special" Mag Loop MFJ 1788
coming on line shortly, as soon as I finish repairs.

Thank the project of K1JT we have now the possibility to test homebrewed antennas without direct help of other OM's. Made especeially with the zero-cost CAPANT_DL7AHW.

I made a few changes to the map page. Default is much larger now. Took the "default zoom" and "hours ago" out of the form, and put in the ability to just show the paths of a given call (sent or received). Also, you can pick the time interval (most recent 30 minutes, 1 hour, 3 hours, ...). Please do me a favor and don't do a lot of "all bands, all calls, 24's messy anyway :-).

Comments/suggestions welcome.

I implemented a new statistics page yesterday (see "Stats" link on top) with a number of graphs and a day-by-day summary of WSPR activity. Other report ideas welcome!

Thanks to Julian for his "Getting Started" guide
With correct frequency and synchronized PC clock, WSPR gets decoded from the first try!

For me it was helpful to start the old good DigiPan additionaly to WSPR (basically, any waterfal display program would suit) to see those whistles around 10.140.200, starting every even minute and two minutes long.

My MEPT with WSPR is off air from 11.00GMT today. My current MEPT on the frequency uses a simple 'G' ident.