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.

If anybody interested on 10m, please contact me leaving a e-mail.
I am resident in South Portugal grid IM57 5W or 1W into a full size loop.

Angelo CT1JTQ

If anybody interested on 10m, please contact me leaving a e-mail.
I am resident in South Portugal grid IM57 5W or 1W into a full size loop.

Angelo CT1JTQ

I´m doing WSPR since some days and I was heard from different VK-Stations with my only 10 Watts and small GP-Antenna. I also heard VK-Stations on 40m, I never heard VK before. Very exiting! 73 de Stefan, DL4SEW

I will be back again now from 5 to 26 of March. 30m, 17m and possibly 12m.
location is IL38ar Fuerteventura northwest.

Today i start experimenting with indoor antenna and 5 Watt , on my first try i get 3 response on 40m , thats incridible ....
connecting the icom over SPDIF Interface to reduce rf noise from PC .

receive also many different stations

Has anyone tried Debian 5.0 I wonder.

I find :-

WSJT from the repository does not run - complains of python numpy errors.

WSJT / WSPR previous compiles on Debian 4.0 do not run on Debian 5.0.

WSPR does not run when compiled on Debian 5.0 - a whole catalogue of errors not previously seen.

Last night I was spotted by a station who identified as BY3AKL1X, coming from grid OM89ua, which is on the coast of mainland China, near Tianjin.

I'm not sure what to make out of the callsign though (although I admit to not knowing much about Chinese callsigns). Is this a U.S. call (KL1X?) operating in China?

2/16/09Z I see stations all over on the map and i was heard by WB2YUN out in the Pacific. Also other stations around the states. However, i am not hearing nor seeing any stations on the screen. I know the radio is working because i see RTTY signals on there but not one, Not one WSPR station. Arizona is truly in the sink hole for propagation.

Just put up a new antenna. I made it for a Field Day contest for portable operation. It's up in the trees at my place for testing and tweaking. It's a vee beam. Legs are cut for one wavelength at 40 metres. I made it after reading several websites, and settled on the document by ZS1AN at

This wire antenna is fed with several metres of twin feed, a 4:1 air wound balun, then coax to the tuner. At the moment, SWR measurements are a bit high (as high as 4.0:1 in some places) but that should be fixed when I do the final tweaking.

This antenna works on multi bands. It's not better than my YAGI on 10,15,20, but it's a darn good antenna for good results in a portable situation.

the beam is pointing sort of towards Europe (the included angle is about 90 degrees, so the beam is not narrow). I'm using it tonight for WSPR.

UPDATE Feb 26, 2009

I've added a couple of additional features to the QRP WSPR transmitter.

1. Completed the switched attenuator so that I can send at 23 dBM, 17 dBm and 10 dBm under control of the PIC.
2. Added GPS support (see below)

I use the GPS to get time of day information and also an accurate 1 pulse per second clock. This is used to update the time of day and to calibrate the symbol clock for WSPR (generated from the internal soft clock generated from the 32.768 Khz (nominal) crystal.

Being paranoid, I also added a thermal fuse to my "oven" so that power to the heater is removed (permanently!!) if the temperature inside the enclosure gets to 72C.

I got the TX on the air just after sunset local time today so missed the bulk of the day's propagation - that said, my first spot was from WA2YUN!

Look forward to getting spots - especially at the lower power levels!


With thanks to Gene W3PM and indirectly to Johan SM6LKM, I am now on the air with a homebrew WSPR transmitter running 0.5 watts (antenna = 160m inverted L with remote tuner) on 30m.

Just prior to 11.00Z my Multimode MEPT was off air for a few minutes for an Antenna change from the 6m Vertical whip to the low, sloping 10MHz 1/2Wave Dipole.

With apologies to DG0OPK if you were doing any tests.

I have changed my current set up for WSPR (other than my Multimode on 10.140073 MHz) in order to reduce power consumption, noise and to utilise Solar Power as much as possible. This will of course help considerably with Portable operation.

The Radio in use is the Yaesu FT-897. The computer the Samsung NC10 Netbook.

I can't believe it. Looking at the map. All that activity and i'm not even hearing anyone "beaconing". Yes i have a 30 meter dipole up and it works well. I hear the Propnet folks and other signals but i'm not getting anything with WSPR or WSJT 6. An occasional "funny" catch and i see the signals on WSJT 6. Only thing i get with that is an occasional "73", RRR or RO. Can propagation be that bad? In the past months i've collected pages of spots on WSJT 6, now i haven't spotted anything at all. Like waiting for good propagation to come around, i may not have any hair left by then.

Mmm!, thought of using the HB9CV for WSPR on 2, but decided to see what action there is on UI-View lately instead. Used to have it running years ago with the KW D-700, but had to flog it when financially embarrassed *sigh*. Anyway, seing as the IC-E2820 has only entertained one Digital Voice for over a year now (No repeaters in range), decided to use it on 144.800 with the old PK-12 tnc, plus the HB8CV of course. Since the new Kenwood has been around for a while now, it would appear that UI-View has had a resurgeance. Loads of peeps on the screen, i see now. This is running on a seperate computer to the WSPR set-up incidentally.

Also on that computer, using a switchable serial port, is Radiocom 6 driving an IC-817 for SWL'ng. Invariably i leave that decoding NAVTEX which is built in the Radiocom software. It also has SSTV and PSK capability, but honestly, it is not a patch on MMSSTV and Multipsk/DM 780.

The WSPR computer is also setup to drive a PCR-100 with Radiocom 6/Ham Radio Deluxe, BCTOOL driving a Uniden UBC3500XLT scanner, or SBS1 virtual radar.

Not connected to computers are UBC780XLT/UBC3300XLT scanners and a pristine condition FRG-7.

I think the concept of the Wednesday Special Activity Day (SAD) is excellent and up to now has been very successful in encouraging stations to try bands other than 30m. I do think however that it could be far more useful if it were extended into activity periods of say 3 days at a time over Friday, Saturday, Sunday for instance. This would allow operators who are at work during the week to take part and maximise activity.

Some stations are already doing extended transmit and receive antenna experiments, some are involved in propagation research, others in qrpp activity. All of these would benefit from extended periods of activity to obtain reliable results. It might also allow stations to perhaps try out different antennas during the activity period in the knowledge that the activity would be there again the next day/night.

The following list of dates, allows for activity on mainly darkness bands like 160m and daylight bands like 10m to take place during the same activity period.

Extended 3 day activity periods

6 – 8 February 160m/10m
13 – 15 February 80m/12m
20 – 22 February 40m/15m
27 Feb – 1 March 60m/17m
6 – 8 March 160m/20m
13 – 15 March 80m/15m