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.

As of 00Z February 1st 2015, I am stepping down as one of the administrators for WSPRnet.

If you have questions or need help with WSPRnet such as updating your email address, site issues etc, please contact Bruce W1BW.

Hi all

I have just bought a new Yaesu FT-817 . I am going to use it on 500mW most of the time.
Power :- 500mW
Antenna - Windon CWS-80 TheRadioWorks.

Have recently tried a couple of weekend tests on 160M, still using the same setup, but tuning the Ant system with a MFJ tuner to get a 1:1 Match at the TX, certainly hearing wise,the system seems to work well, but reports back on my transmission certainly show up the in-efficieny of the HF9V as a 160M Ant, without the 160M coil for it? if I hear 20 stations, as a return I am probably only reported by 4 or 5 in return!! May look at purchasing a 160M coil for the HF9V, although its a compromise antenna at best, cannot get anything taller or long out.

I'm now qrv wth My Ultimate3 wspr unit. I'm transmitting on 28.126.100, and now hoping for some reports
Vy 73 de OZ1BEE

A real surprise on 160m, between 05:02Z and 06:46Z (EU sunrise), not less than 67 DX spots "across the pond"; 40 from EU and 27 from NA. In the party were: K4MOG, KJ4YBS, N2NOM, WU2M, G0KTN, G8HUH, G3VIR, G4FKK, G4BOO, F59706.
We note a probable new qrpp record (EU to NA) with 200mw (congrats to Martin and Rocco):
2014-11-10 06:38 G4FKK 1.838027 -26 0 IO91wi 0.2 WU2M FN23tb 5440 291
For my part, I was able to decode two new stations (K4MOG, WU2M), bringing my score of my RX challenge to 17 (close to my 19 of last year at the same time.

Fingerss crossed for my first spot! :)


Following a storm my 30m WSPR beacon is offline, I'm hoping to get it back up and running this week.

Also considering adding another band to it, perhaps 10m.

Has anyone thought of a new WSPR freq in the recently allocated UK (by NoV) in the 146-147MHz band? (Use it or loose it am thinking). I am experimenting using WSPR on DIAL freq of 146.9000MHz (Tx on 146.9015MHz). However, I found WSPRnet will not show this frequency in either the 'Activity' list, nor on the 2metre map.

W4ATV is an experimental solar powered sub-mW WSPR beacon located in Madison, Alabama (EM64). It is capable of outputting either 1000, 500, 250, or 85 uW on 30m. Power output was verified using a calibrated HP-432A power meter and GIL-360-2 bolometer mount. The antenna is 5.5m vertical with 24 1/4 wavelength buried radials. An antenna with a higher radiation angle would probably produce more spots.

This is an Android app that depicts current band propagation conditions as determined from WSPR spot reports.

I am about to publish this on Google Play but would like to test it on a few more devices.

If anybody would like to help me with this I would be enormously grateful.

Email me at and I will send you an APK file to install.

73 de G4SWY Derek


I've been on 160m at night for the last two weeks. Last night was the worst night so far - with just two spots. I looked at the map and it was sparse. I wonder what is going on with the propagation. I started to read up on 160m propagation and my head started to spin. Something about an enigma wrapped in a mystery - or was it the other way around? I'll have to do some more reading.

Any insights out there from those on 160m?

Tonight is off to a better start.


I decided to do some low power runs, after chatting with some new friends on this site.
It's always amazing to see what low power (and good band conditions) can do!

TX setup is an IC706MKIIG turned down all the way to 1.4 Watts, fed to the tuner/antenna through a "green" 5X (voltage) Tektronix attenuator.

This gives us 1.4Watts/(5^2) = 0.056 Watts.

With this 56 milliWatts, here are some of the results:

OK here we go, a nice new Alpha Delta DX-CC antenna put up in the garden. I have loads of great reports from DX stations, I even hear loads of stations on wspr, but I don't get any spots. I can't work out what's happening!

Have now been using the loop for a few weeks now, have dropped the noise floor around 6dB by choking the loop feeder at the shack end.
Perhaps I'm around the floor now, doubling the loop area has not gained any s/n improvement, results now seem about the same as other UK stations. The loop is bandpass filtered, I have a simple method of sweeping the loop in place. The loop output goes into a HP 141 Spec anal with the Tracking gene driving a 6' square wire loop in the house so I can sweep the loop directly.

A large X1.6 solar flare occurred while I was listening on 10m. I saved a screenshot of the wspr screen to show the wavy signals that immediately followed the start of the solar flare at 1402z.

Files are here:

One file is the screenshot of my wspr screen. Notice the wavy signals at 1404z and 1406z.

The other files are a graph of the X-ray flux from the NOAA website. The flux rose very quickly at the start of the flare.

I just put a flex 1500 on the 43 foot vertical at 2 watts on WSPR-2 and hope to let it play for a long while.

2014-10-20 06:06 WB5WPA 3.594150 -24 0 EM13qc 5 F5OIH JN06ci 7889 46
2014-10-20 05:40 KD6RF 3.594129 -17 0 EM22lr 5 F5OIH JN06ci 7810 47
2014-10-18 05:54 K9AN 3.594169 -17 0 EN50wc 2 F5OIH JN06ci 6807 52
2014-10-20 06:06 KC9NBV 3.594096 -20 0 EM69oe 1 F5OIH JN06ci 6780 52
2014-10-18 06:24 KF9KV 3.594057 -25 0 EN52et 5 F5OIH JN06ci 6721 53
2014-10-20 05:40 K3GAU 3.594085 -19 0 EM89cv 5 F5OIH JN06ci 6527 53

I am new to WSPR, but I already have a question: Do you report your WSPR contacts (contests, WAS, DXCC, etc)?

With the seasonality of 160m, it is nice to see again friends. This morning, Frits was present to the RDV of 160m wspr. Once again, I heard its 500mw (last time 2013/10/09):
2014-10-18 03:58 W1FVB 1.838047 -27 0 FN44ej 0.5 F59706 JN07th 5467 59
2014-10-18 04:58 W1FVB 1.838044 -24 0 FN44ej 0.5 F59706 JN07th 5467 59
He tried to reduce to 250mW without success but it is only "postponed".

Frits wrote in his blog this morning(

Wasted several hours today trying to find a 6 character ML code that at least covered my suburb. Ended up improving over the default but the 6 character combinations are really too coarse - possibly ok for HF where the distances are huge, but more precision would be good for VHF.