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 had spots from PA0HCK with 1mW at SNR -10 dB and switched to 100µwatt

2009-12-25 09:20 ON8DC 3.594057 -20 0 JO21be 0.001 PA0HCK JO33ld 291 40
We have to invent new parameter µ watts /km and taking SNR into account.
Merry Christmas to all

already spoted by "Bigears"
2009-12-24 16:00 ON8DC 3.594065 -24 0 JO21be 0.001 G3YSX IO91wg 296 273
2009-12-24 16:00 ON8DC 3.594056 -20 0 JO21be 0.001 PA0HCK JO33ld 291 40
2009-12-24 16:00 ON8DC 3.594064 -25 0 JO21be 0.001 DC4FS JO33vn 363 42

I started with WSPR the first time today. Using WSPR in a virtual windows machine running on a mac.
Will use my 3 el. for 40m beaming 300 deg (W) with 10 W starting 17:05 UTC Dec. 23rd for a few hours.

For me WSPR is an exciting new approach to study shortwave propagation.
Thanks for this new facet of ham radio to K1JT.

By the way, I just received VE6AXL on 40 m 17:14 UTC great!

40m every 10min 80m every 30 min using si-570 beacon PE1NNZ/QRP2000 with attenuator
I will try tio find out their equipment.

250µ Watt -6dBm W3DZZ

2009-12-23 12:10 ON8DC 3.594069 -21 1 JO21be 0.01 ON7AN JO20 98 143
2009-12-23 12:02 ON8DC 7.040056 -26 1 JO21be 0.01 G6YEK IO81mi 493 275
2009-12-23 11:50 ON8DC 3.594064 -16 0 JO21be 0.01 G3JKV IO91uf 308 273
2009-12-23 11:30 ON8DC 3.594066 -23 0 JO21be 0.01 G3YSX IO91wg 296 273
2009-12-23 11:02 ON8DC 7.040059 -27 0 JO21be 0.01 G6YEK IO81mi 493 275
2009-12-23 10:52 ON8DC 7.040159 -24 0 JO21be 0.01 DG0OPK JO50gq 453 95
2009-12-23 10:52 ON8DC 7.040160 -28 0 JO21be 0.01 G6YEK IO81mi 493 275

500µ watt -3dBm W3DZZ

2009-12-23 10:10 ON8DC 3.594068 -24 0 JO21be 0.01 G3YSX IO91wg 296 273
2009-12-23 10:10 ON8DC 3.594066 -25 0 JO21be 0.01 G3JKV IO91uf 308 273
2009-12-23 10:02 ON8DC 7.040062 -22 0 JO21be 0.01 DG0OPK JO50gq 453 95

My first dip into wspr. usually contribute to will try switching to activity frequency later tonight.

Thanks to Vlad, UA6JD, a Russian translation of the WSPR 2.0 User's Guide is now available. A link has been placed on the WSJT/WSPR web site:

We now have translations of the WSPR 2.0 User's Guide in French, (Brazilian) Portuguese, and Russian. Translations into other languages would be very welcome; if you are interested in doing this and would like a copy of the original MS Word file in English, please let me know.

-- 73, Joe, K1JT

Well here in the Northwest corner of England we are experiencing probably the first spell of very snowy weather since (by my reckoning anyway) 1996.

I think we have about seven inches (18cm) of level snow, and thankfully there hasn't been any wind to whip it up into deep drifts.

No big deal. However ... Not good for loft-mounted antennae!

There appears to be about 3 to 4 inches of snow lying on my roof.

I have documented my most recent project that allows a portable SSB QRP transceiver to transmit WSPR beacons from a portable location without a computer.

The project consists of a simple audio oscillator controlled by a Microchip 16F628 PIC that has the following capabilities:

- Internal timing or NMEA GPS timing for UTC synchronization of WSPR transmissions.
- RS232 input of the WSPR message.
- Line or microphone output.
- Symbol data output available to modulate a VXCO
- Low power consumption allowing battery operation

All the rage here are "LED" Christmas lights with "wall wart" power supplies with some fancy electronics to produce an amazing variety of light switching sequences.

In my neighbourhood "Light Wars" broke out earlier in the Christmas season - everyone seemingly trying to outdo everyone else with the brilliance of their festive displays.

Outdoor arrays seem to make pretty reasonable TX antennae.

Not good news for the poor QRPp WhiSPeRer :( I reckon my noise floor has risen by 3 to 6dB!

Hey Ho, c'est la vie!

First of all, I wanted to report that the site changes made over the last month have helped stability considerably. Things seem to be running much more smoothly, resulting in far fewer load spikes (which were causing timeouts when posting spots as well as viewing pages).

I will be on holiday from Saturday the 17th through the 31st, and I will be pretty far out of touch for most of time. I don't anticipate any problems while I'm gone.

I want to thank Trevor G0KTN and Stu K6TU (ex N6TTO) who have been helping with the site administration. Those two are the best points of contact for site issues while I'm gone. Stu has also offered to help with some future site enhancements. We've talked about a bunch of things we both would like to see done, and it will be great to have some help on the programming side.

I see Pavel, CO6WT (below), also just offered to help with some of the analytics, which is also something Stu and I have talked about. Thanks, Pavel, though I probably won't have time to work with you too much until January.

Folks I have been working with php for some years now, and reading old blog posts and thinking a little I can make charts or graphics for wspnet site...

Lets say a interface that let me pick another call and a time range (predefined, say 24 hours, a week a month a year) and plot in a graph for statistical & propagation means...

I only need a sample of the REAL wspr database table (structure and some data) for program the necessary pages and integration with drupal, and in this old/new year holidays I can push it to almost end... (if beers and XYL let me do so...)

Hello folks, as you may noticed, CO7WT (me) is on the air with async logs uploads, so, not only check online/real data, you may review data of 24 hours reports, as I upload the logs of the local night in the post hours; that's because I have internet connectivity only on my work place.

Locator FL11BJ, TRX FT-80C, Power 10W

I had RX some interesting stations some VK, some PY2 some JQ2 and USA and Europe on regular basis... activity mainly on 30m night time (aprox 0300Z to 1200Z)

Sorry for my English. 73.

I let the WSPR run a couple of hours on 20mtrs today, just to test the reported QRG's. I checked my TX QRG accuracy & stability before and after the data collection to be within 2 Hz.
I expected to get a symmetrical Gauss distribution but that was not the case. Please look at the frequency deviation of total 41 stations with 270 spots. The mean freq deviation spot of each station is plotted. Only 16 out of 41 stations had a max deviation of + and - 4 Hz.

Time to check the TX folks or use the freq correction in Version 2


remark big ears SM0FLY DL2ANV they must have low ref noise and excellent antennas.
I am using a PE1NNZ SI-570 Beacon with 10Db att at output into W3DZZ at 10m.
I did not change manually the power in the data base it is 10mW.

1 mWatt +0dbm Test
Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
2009-12-12 16:34 ON8DC 3.594067 -20 0 JO21be 0.001 G0KTN IO81ti 452 275
2009-12-12 15:58 ON8DC 3.594066 -15 0 JO21be 0.001 DL2ANV JO33tc 320 47
2009-12-12 15:58 ON8DC 3.594068 -23 0 JO21be 0.001 G0KTN IO81ti 452 275

2009-12-12 12:46 ON8DC 7.040058 -23 0 JO21be 0.001 HB9TMW JN36gq 531 160
2009-12-12 12:34 ON8DC 3.594066 -14 0 JO21be 0.001 DL2ANV JO33tc 320 47
2009-12-12 12:16 ON8DC 7.040155 -12 0 JO21be 0.001 DK3SML JN49sf 443 117
2009-12-12 12:16 ON8DC 7.040157 -22 0 JO21be 0.001 HB9TMW JN36gq 531 160
2009-12-12 12:06 ON8DC 7.040058 -24 0 JO21be 0.001 HB9TMW JN36gq 531 160
2009-12-12 11:56 ON8DC 7.040157 -22 0 JO21be 0.001 DL8BB JO41ul 389 83