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 everyone! I just got back from my sailing trip and checked the database: More than 2.500 enties on 80, 40, 30, 20, 17, 15 and even some on 12m within 6 days! No spots on 10m though - obviously the piece of wire I used as an antenna didn't work on 10m at all. Among the spots are some really nice one's:
2009-09-06 16:08 OE1IFM 7.040118 -22 0 JN65 1 VK6POP OF88bd 13432 106
2009-09-09 20:58 OE1IFM 14.097125 -18 1 JN65 1 WB5NMZ EM62vi 8152 299

Interesting to see the spots from the antipodes with 5 watts to the vertical. Difficult to return the compliment due to relatively high urban noise levels. After an antenna overhaul I will try a power reduction to 33 db and see how that works.

I am looking forward too new things in this wonderful hobby & new thing too occupy my excess time & more interesting things !

You may have a look at
The good news is that a large majority of reporters are within +/3Hz and has a good frequency stability.
You can see how I calibrated my TRX before/after the night.

Yesterday i developed a very simple web app that searches my local WSPR database and returns all 2WAY WSPR spot pairs that i had...

¿What i call a "2WAY WSPR spot pair"?
A pair of "inverse" spots whose timestamps do not differ more than 10 minutes in the same band. "Inverse" menan that callsign and reporter are switched in those spots.

Nothing really new, but for the newcomers to 80,160m and below bands, I've posted a few new plots, result of last night experiments on 80m. It is on my Picasa web-album.
You may start here:
And move forward using the album arrows.
It shows what kind of improvement can be expected from a simple magn-loop versus a vertical in a noisy environment (if you are lucky enough to have a very quiet location "man-made noise-free", it may not be that effective - A magn-loop is only effective to nul-out a local noise source arriving at low angle).

It is not the first time I am doing such a tests, using a Magn-loop and/or a K9AY. More tests can be seen by following the links at the bottom of the last album picture.
A good start on "low-band receiving" specific problems, and comparison of RX-ant perf. can be found at

I have just been taking my first steps with the software, as usual without reading the instructions. It's suprising how far you can get on instinct!
Managed to log VK2UD on 40 metres twice between 2100 NZST and 2200 NZST, but due to incorrect set up have lost the record and didn't upload. Better next time he comes up I hope.
Transmitting can wait until I have gor the receiving correct.

Hi all,
Finally I got my Softrock 6.2 (80m/40m) running for WSPR. I am using ROCKY feeding the VAC (Virtual Cable) feeding WSPR. I tried Winrad, but I have massive stability problems with it. One of the first stations received with the Softrock was VK6BN. Great stuff. Any others here using the Softrock ???
73 de Christoph DF9CY

I will be on a sailing trip from Sept. 5th to Sept. 12th cruising the northern Adriatic. My latest WSPR beacon will be active all week on 80m to 10m with 1W into a piece of wire. As WSPR does not support pre- or suffixes to the call sign, the beacon will be operated as OE1IFM. Most of the time the correct call will be IK3/OE1IFM. For short periodes OE1IFM/MM will be appropriate when we cross from Italy to Croatia. There 9A/OE1IFM will be the correct call. I will try to announce the actual correct call on the WSPR homepage.

2009-09-02 17:52 ZS6Y 10.140216 -22 0 KG33wv +40 10.000 KL1X BP51 16075
Welcome to Johannesburg South Africa

my rig

tx/rx icom 746. power 5 wats
antenna vertical home made. and ant,2, g5rv, home made
my age 56 years .
my sec, hobby are sport fishing carp/ and pike.

info and link to pictures radio hobby
greetings martin.

I had a very heavy workload during the spring/summer months, but I am finally resurfacing. I have been behind on site cleanup issues (database fixes, etc) as well as correspondence and general improvements. Keeping up with the scalability for the site has not been trivial, either, as we have experienced a new wave of growth in WSPR participation. I finally expect to be able to put some time into these things in the coming days/weeks. Thank you for your patience!

I have set up my DDS MEPT with WSPR Ident on 50.294395MHz and it is running on test ready for tomorrows 6m activity day.
Despite running just 100mW this MEPT has been copied at C.150Km in the past. It will be interesting to see how it does with the added activity.
Note:- as it runs continuously and with several modes it is just outside (at the bottom) the WSPR slot.

Noticing some WSPR activity on 504 Khz band and having 0 experience of bands
below 1.8Mhz I just tuned-in to see. Just using my untuned vertical and
despite my very noisy location I received the SM6BHZ beacon immediately.
Reminded me when I first heard W5UN on 2m EME (just using 4x9 home-made yagis
made from Al recovered from the bin...)... magic !

Knowing the improvement brought by the RX-loop on 160m, I decided to try
quickly something to see if the 160m loop could be tuned down to 504kHz.
A quick calculation, indicated that I needed around 1nF capa to get the loop
to resonnate at 504. in fact 1nF was not enough, the final value was found by
experimentation (just using the band-noise to find the resonnant freq) to be
around 1390pF (2x470pF + 2x220pF silver mica caps + a small 40pF adjustable
cap), which means that my 6 turns loop has an inductance of approx 72uH (and
not 100 as first estimated !). At this frequency, the bandwidth is extremely
limited, just approx +/- 1.5kHz at -3dB.

I then discovered, that the IC756pro2, did not have sufficient sensitivity to

Is active beacon IQ4DJ (RADIO CLUB ARI CARPI) to 137 kHz 24 H no stop

Signal to WSPR 137,500 Khz (USB dial 136,000)
Signal to QRSS10 137.760Khz
signal to QRSS3 137.700Khz

40W power on 50 Ohm
Vertical antenna 12m + 20 m horizontal
0.6 A current in antenna

Are welcome spot.

For the radio club I4BBO Valentino

Electronic Translation