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.

I got schooled in JT65 today.

Decoded several JT65a transmissions, one from ZL3PAH, whom I was excited to complete a qso with and put out a weak 6 or so watt response. Little did I know at the time that the club rig at KL7AA is incapable of upper side band with JT65.

The next day after my initial JT65 emissions I got on the chat/sked page for JT65 Terrestrial at webpage. With help from Armando, LU8WAG, Barry, VE3CDX/W7, as well as test emissions with NI0B in Nebraska and several others the diagnosis revealed itself.

Hi guys...!

After digital modes as BPSK,RTTY and SSTV, I'm very interested by WSPR but I'm not able to install it software.
Maybe I use an old computer.After installation I click the icon WSPR it open but let appears windows saying "error" and "must closed".The programm would'nt runn and stay..! Hi..!
Is anybody else able to help me please...?
My computer is an old IBM and my system is Windows XP SP2.Many times I have tried to install it...but always the same result...Please help me guys...! Thanks so much..!

I have struck a puzzling thing here with regard to frequency calibration with WSPR.

I had got into the habit from my old VK2ZTO QRPpp days of calibrating frequency via WWV.

The process I would follow would be to:-

Having observed WSPR for a number of days (which of course qualifies me as an expert... ;-), I have noticed a puzzling thing. The decoding success does not correlate well with observed signal strength as observed on the trace (at least at this location).

That is, sometimes a very faint trace will decode well and often. But sometimes a strong signal decodes only occasionally (at this QTH ZL2FT is an example - but also other single-skip stations exhibit this as well).

Just when I thought it was a characteristic of strong local (<5000km), the same thing happened for further stations.

The screenshot is here...

The orange circle/eclipses enclose the GW4BVE.

The green circles show faint traces of another station undecoded.

Note during the GW4BVE decode time slot (09:54) a jump in frequency from about 50 to about 66. This is not a jump at my end as the other traces show.

Curiously the freq. goes back to about in subsequent TXs...???

My first 17M decode.

Steve VK2SRO

I installed the latest WSJT package on the computer that I use to control the Flex-5000. Everytime I set the input or output to the virtual audio cable, the nasty little message from microsoft comes up telling me that a an error occurred and the WSJT routine must be closed.

As you can tell, I'm trying out a new theme for the site. I like it better than the default because it's more space-efficient...things aren't so spread out, and especially the sides don't take up as much room. Comments welcome; it's trivial to change it back, or if you want me to hunt for other alternatives, I can certainly do that as well!

Have been QRV on 30M for about 7 hours and as expected only 2 reports (both VK6DI) so far.

What I didn't expect is this....

2008-12-21 15:46 VK2SRO 10.140150 +4 0 QF56ik +27 0.501 VK2SRO QF56ik 0 0

Is this normal or am I doing something wrong ?

Checked for multiple instances/processes of WSPR on the two PCs running here and found only the one pair (GUI and Console Box) on one PC as expected.

Any clues ?

Steve VK2SRO

WB2YDS WSPR Station Info

LOCATION : Long Island IOTA NA-026 in
Grid FN30nw

RIGS : IC703+ and IC706MKIIG with TCXO usually set for 1 Watt output .

COMPUTER : An ancient Dell Optiplex desktop , Pentium 3 ( I think) running
Windows XP . Seems to do a great Job on WSPR and other Digimodes using Multipsk.

INTERFACE : The Rigblaster Plug and Play.

Following the low-down on compiling WSPR1.1 on Ubuntu 8.10 I can confirm that WSPR7 compiles and runs stable locally at least with:- numpy 1.1.1. Fortran compiler:- g95.

It still needs to undergo overseas trials. The GUI is fine on default Ubuntu display and font settings. From previous experience I am pretty sure it will do large high definition monitors.

QSO's have been made on WSPR QSO mode and many of the other mode available. I have even had a JT65 6m Meteor Scatter contact with my own compile at both ends of the link.

WSPR 1.1 is now into r1045.
Someone said they thought they had r1045 but the Version displayed was WSPR1.1 r1042. I also could have sworn I saw r1043 and have been calling my compile which I try on multi distro's r1042/3.

The current source code WSPR 1.1 r1045 compiles and runs on Ubuntu8.10.
As promised here is the definitive list of dependencies. If you install Ubuntu 8.10 afresh all you need is.

python-numpy 1.1.1 (no problems with this version here yet)
python-imaging tk

I have been looking everywhere on this website for the WSPR 1.1 link. I had found it a few weeks ago, but lost it. However, I did download the 1.1 package previously, so I posted it to my Windows Live case anyone else wanted to have it as well.


Completed the installation of a remote antenna tuner at the base of my 160m inverted L this afternoon - just before the heavier rain started.

Can already see a significant improvement on receive having copied HG8LMQ and IK1RKU for the first time on 30m. Judging the transmit improvement will take a little longer but also appears to be better.

I've attached a picture of the temporary center loaded vertical I've been using on 30m for the last week.

How about the following idea?

A special activity on a pre chosen band on a pre chosen day.

Split the wspr band in two parts (lower and upper 100Hz)
Use the upper 100 Hz for wspr beacon mode, max 20%tx max 1Watt (wspr software).
Use the lower 100 Hz for wsjt qso mode (mode wspr) max 1Watt. (WSJT7 software).
One could use the two programs at the same time, however if you wish to make a qso you have to switch wspr in rx mode for the time of the qso, (no big deal).
So one could try to call a station seen in the upper 100Hz and make a qso in the lower 100Hz, (and send a qsl?).

Any idea what ive decoded ???

While running a wspr beacon on 70,030.000 carrier frequency, with
g4wgt, this evening, I started to decode what looked like wspr-qso
mode traffic .. one with 17 sync pulses must be 100% decode , but
TV6XVL what call is that from ??

081213 2208 17 -11 0.0 10.140215 73 DE TV6XVL NA98 -4

D4HAC was listed on the decoded call list as was just the number '3'
at one point
OZ5HAF ? nothing in qrz or even google ?
If NA98 and IA96 are qra locators then things are starting to get
silly ...