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.

KH6UL WSPR beacon up and running as of 082014Z May 14.

Based on Gene Marcus Arduino Mega 2560 & DDS60 WSPR/QRSS Signal Source design, with 0.2W, 160 - 15 meters, 0.1W 12 & 10 meters, into the West antenna of the 21 Element Vertical Log Periodic Rosetta Array.

Feed: 300' 1 5/8" Heliax

Antenna gain:

12 db @ 0 degree
5 dB @ 90, 270 degrees
0 dB @ 180 degrees

See for RMS / NAVY MARS article

Now is ea8/dl9xj finished from Tenerife. I hope in 5 -6 months a new acticity from Canary islands. I will work from my home qth, but the conditions are not good (inside city and only a ATAS 120 on a balcony)
73 Walter

Someone located in "KN95MA" and transmitting WSPR on 20m is using my call sign. the output is set to 5w and they seem to transmit every 10mins or so for about an hour in the afternoon.

Please check your settings and make adjustments accordingly.

Thank you

Dan (M0TGN)

[UPDATE 1715Z 9th May: Test now ended; Many thanks to G3NR, G4FKK, F5MFO, G4FFC, and those who I didn't manage to spot, for beaming their 2m signals in my direction.]

If anyone wishes to try a test transmission, I'll be receiving 2m WSPR for the next couple of days.
Locator JO02ac, near Cambridge, England. Dial frequency 144.492 MHz.
David G0LRD

I've made a blog entry about this activity here:

Call MHz SNR Drift Grid Pwr Reporter RGrid km az
2014-05-04 22:44 RX3DHR 1.838173 -6 0 KO94ks 5 OH2SWL KP20uj 1001 314
2014-05-04 22:34 RX3DHR 1.838174 -21 0 KO94ks 5 PI4THT JO32kf 2116 276
2014-05-04 21:36 RX3DHR 1.838173 -28 0 KO94ks 5 F59706 JN07th 2697 268
2014-05-04 21:22 RX3DHR 1.838179 -28 0 KO94ks 5 G0MQW IO91ml 2646 279
2014-05-04 20:34 RX3DHR 1.838174 -27 0 KO94ks 5 VK2KRR QF34mr 14256 99

I made some tweaks to my attic mounted dipole antenna this afternoon. Armed with an antenna analyser I finally (after four months) checked to see if it was anywhere near resonant on the 30m WSPR frequency - it wasn't. After much trimming, and some changes to how the ends of the dipole hang, it is now matching better on 30m.

Immediately after putting the beacon back on the air I saw it getting a fair number of spots but it will be a few days before I can really say it has made a difference. Perhaps now I can beat my record of around 2000km @ 10db?

I've been using JT65 for about a year and having fun with it. Just discovered WSPR and am enjoying "listening". I have a softrock rxtx on order and plan to be on-the-air within the next few weeks.

Been having fun listening on 474KHz, and bagging a number of good stations on WSPR-2 mode using my funcube pro plus dongle and SDR Console software. Recently acquired a Clifton Laboratories filter to get rid of some local BCB QRM and now hearing much better.

Next few days I will listen at night with WSPR-15 mode. If you transmit on 600M, I'd love to see how this mode works.

Thanks to Hans again - yet another on the air.

Any spots greatfully received - I've just hooked up the SKM52 GPS to the U3, both of which worked first time :-)
The GPS is incredibly sensitive as it locked first time in the shack (with not a window to be seen)!

120mW to a top band dipole so fingers crossed,

73 de John G8DYK

Hi all,
Today my beacon is ON and will be until 31 of may.
Info on

4 spots:
Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
2014-04-30 01:40 IZ3ATV 21.096025 -14 0 JN55vk 5 K4RCG FM08xl 7070 299
2014-04-30 01:18 IZ3ATV 21.096023 -25 1 JN55vk 5 K4RCG FM08xl 7070 299
2014-04-30 00:34 IZ3ATV 21.096024 -24 0 JN55vk 5 K4RCG FM08xl 7070 299
2014-04-30 00:16 IZ3ATV 21.096025 -24 0 JN55vk 5 K4RCG FM08xl 7070 299

Play attention please.

I am receiving Ok on my 703 but cant modulate on TX !

I hear TV for hours and see the odd spot from Jh1GYE and sometime other JA1 stations.
I don't make it to RA0Ck or see any other JA stations.

Hi from Landshut,

i have the level on the Raspberry pi measured.

Here the values
160m +18dBm
80m +18dBm
40m +20dBm
30m +19dBm
20m +17dBm
17m +20dBm
15m +19dBm
12m +14dBm
10m +13dBm

This corresponds to an output of 20-100mW.

Test setup: Raspberry PI + 35 MHz low-pass filter + 20dB attenuator in Sectrumnalyzer no amplifier

greetings from Landshut
73 de DL3RCG

Hi from Landshut, JN68bm!

Since today I´m QRV again with my Raspberry Pi and 10mW (only the Pi-output)
on 10, 12, 15, 17, 20, 30 and 40m to a Cushcraft R7.

TNX to DL3RCG for his support setting up the Pi for WSPR!
Let´s see which spots are possible with this setup!

73 de Lenz,