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.

Paul, VK4ZBV, asked my to put up some info on my use of WSPR on the Mac.

I have tried various compiles of WSPR for the Mac and almost all have had the dreaded memory leak, which causes the running application
to allocate more and more system memory until the available memory is exhausted and the application quits, or it brings down the Mac itself. In additions, I normally
had to use a supporting SDR Program and Soundflower to channel audio to the WSPR applications.

Experimenting with an old Wonder Wand Mk 2 (52 inch whip antenna and counterpoise). Results are surprisingly promising with JT65A contacts being made out to 1300 miles using 2 watts. Also running WSPR with the Wonder Wand on various bands.

Just switched over to Meinberg, DT's are a lot closer now, (most less than 1 second),Meinberg gets my vote! While I am here, have to plug my new (just completed) Mag Loop, working like a champ!

73, John KC4RSN

So far this is working great for WSPR and other digital modes. Had to reboot a few time to get the VSP's to align themselves so WSPR would communicate with the flex.

I've created a GitHub repo for WSPR on lubuntu (a lightweight version of Ubuntu) 12.10 x86_64 at:

Kenji Rikitake, JJ1BDX (also JO3FUO)

This is my first time experimenting with WSPR, so I still have to do the initial setup and all.

Today I posted an installation file for WSPR-X v0.7 r2960:

Changes from r2948 include the following:

1. An intermittent problem with asserting PTT has been fixed.

2. Frequency reports when the Rx BFO is set to a value other than 1500 Hz have been fixed.

Some of you may be interested in trying WSPR-X, a new version of WSPR that includes the slow mode WSPR-15. WSPR-15 uses 15-minute T/R sequences, rather than the standard 2-minute sequences; at MF and LF it is 9 dB more sensitive than WSPR-2, decoding signals as weak as -37 dB in the standard 2500 Hz reference bandwidth. WSPR-15 is not recommended for use at HF: the tone spacing is only 0.183 Hz, less than the Doppler spreading typical of many HF paths. The main intended application for WSPR-15 is for very difficult paths at 137 kHz and the new 472 kHz band.

I have placed a self-contained utility that, in one go, will generate a text file for use with PIC assemblers. The utility will generate either conventional callsign/4 digit locator or compound callsign/6 digit locator data. Additional information is at

Gene W3PM

This project was updated to include GPS derived frequency calibration and compound callsign/6 digit locator capability. Additional information is at

Gene W3PM

2013-01-11 08:22 OH2GSY 28.126077 -22 0 KP30ll 5 VK2KRR QF34mr 14985 84

I had heard VK2KRR regularly before, but this was the 1st time VK2KRR heard me.

Hi all
This morning at 10 m band I`m received this one,
0910 -20 4.4 28.126173 -1 32B/PN7UPE 53
who knows this call and who received??

Hi All !

Since a few days my Locator Suffix is missing in the WSPR Database.
Now it is "JO50", but it should be "JO50cb".

Any idea what has happened ?

73 peter dl6nl

2013-01-13 07:28 KD8GBK 1.838034 -33 0 EN56st 5 F5OIH JN06ci 6384 55
2013-01-13 06:58 K9PAW 1.838189 -25 0 EN61ar 1 F5OIH JN06ci 6685 53
2013-01-13 07:22 K9PAW 1.838189 -23 0 EN61ar 1 F5OIH JN06ci 6685 53
2013-01-13 07:10 K9PAW 1.838189 -23 0 EN61ar 1 F5OIH JN06ci 6685 53
2013-01-13 01:06 K5DNL 1.838069 -30 0 EM15lj 50 F5OIH JN06ci 7742 47
2013-01-13 02:54 K5DNL 1.838069 -27 0 EM15lj 50 F5OIH JN06ci 7742 47

30 at 04:15UTC still good. Receiving eastern Europe on the east coast of the US

2013-01-11 12:18 DL5AKF 14.097140 0 0 JO50mx 0.05 F5OIH JN06ci 946 241
2013-01-11 11:02 DL1FX 14.097123 -11 0 JN49gr 0.1 F5OIH JN06ci 724 242
2013-01-12 00:06 F4DTL 0.475666 -16 0 JN18fp 0.2 F5OIH JN06ci 306 214
2013-01-11 23:44 F5WK 0.475716 -20 0 JN18hp 0.2 F5OIH JN06ci 313 216

2013-01-11 09:04 ZL4VV 14.097036 -18 0 RE79mc 5 F5OIH JN06ci 19280 327
2013-01-11 08:36 ZL4VV 14.097037 -16 0 RE79mc 5 F5OIH JN06ci 19280 327
2013-01-11 08:30 ZL4VV 14.097037 -14 0 RE79mc 5 F5OIH JN06ci 19280 327
2013-01-11 08:26 ZL4VV 14.097037 -18 0 RE79mc 5 F5OIH JN06ci 19280 327
2013-01-11 08:18 ZL4VV 14.097071 -14 0 RE79mc 5 F5OIH JN06ci 19280 327

Excellent, managed to master Ubuntu enough to install WSJT and WSPR this afternoon.
Now up and running again at a new QTH, hope to be very active once more now I'm not tied to windoze.
Just need a good time synch for the clock.

I decided it would be fun to process all of the spots in the spot database since the beginning (March 2008) and keep track of various "records", i.e. the top 25 spots per callsign in various categories. I had to pre-process some of the data to remove duplicates and properly sort LF/MF bands (newer monthly archive files have better filters applied, but corrections were never made to older data).