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.

Sorry gang,

By mistake I reported 14 mhz spots as 7 mhz spots today March 18th between 16:20 to 22:46

Rolf K9DZT

Hello all, I am currently testing the wspr mode in 6 meters .
Configuration is: 10w full wave loop antenna Horizontal polarization at 24m from the ground (260m asl)
I hope that the first European openings are soon.
The night I stay qrv wspr 160m
73 to all
ON4LUC op: Luc

The station OQ8SNW is a special event station to celebrate the 800th birthday of Sint-Niklaas a town in Belgium. For more info and history check Wikipedia (

Hi all!

Please click on the project page

and follow the link - "English description", the description below contains links to the necessary software and firmware.

If there is not accuracy in the translation, please report to the mail -


After tinkering most of the day with the Bike wheel loop,I finally replaced the coaxial loop feed I was using with just a piece of wire loop. I am now able to get a 1:1 swr down from a 3:1. Since I'm only running .2 watts and the loop is only about 50% efficient it is quite an issue. The feed loop is a little less than 1/5 the loop diameter too. Several loop articles I have read, recommend that. I have ordered a dc motor control for the motor that is attached to the variable capacitor. Right now I'm tuning it with a pair of channel Locks, pretty hit and miss.

Today I got a Mag loop made from a Bicycle wheel rim put together. My Ultimate 3s is on 17meters, but so far no joy. The loop tuning is very tricky. Methinks I need to get my Antenna Analyzer out of the garage. I'm Being a wimp since there is about a foot an a half of Snow on the ground and more coming every minute.

My wife and I spent the month of February in Florida. Old people do that. We made it back home on march 11, and I fired up the QRP-Labs unit this morning. While I was away, I contemplated some antenna designs going forward. I am particularly interested in mag loops, so before the weather gets better, I will be working on a couple design ideas. I'd like to have a RX system too, but there is a high noise level here, and probably it wouldn't be effective, but a mag loop may work, to reduce the noise. We shall see.

Well I have tried 13.8V & two BS170s fort he PA section and I got to almost the south coast of UK from my QTH (JO02op)

Made a 'scop-match as I knew that the antenna was poorly matched - and found it was - very.

Fixed that & changed the impeadance matching transformer - now working at about 58R and almost no reactance (Wx dependant)

So reading Hans' modifications page decided to put together HB9ASB - surprised I had most of it in the 'junk' box.

With out the LPF the waveform was ghastly!

Hello all! We start to publish information on the project in english translation.

Please click on the project page

and follow the link - "English description"

If there is not accuracy in the translation, please report to the mail -


This afternoon I lashed up an MFJ mag loop at only 1.5 metres above ground level just outside my shack. Using my base rig to tune the antenna to the same frequency as the WSPRLITE the swr is more or less 1:1 and the results are very interesting. I'll continue to broadcast with the setup as is for a day or two but the plan now (as the loop seems to be doing a great job)is to move it across the garden into the open mounted at say 3 metres. Then I plan to rotate it and test it horizontally polarised.

I am planning to use WSPR TX on 20m whilst sailing a 13.7m / 45ft boat across the Atlantic starting in the Caribbean in late March, UK by early May 2017. I will run tests from home then in the Caribbean. Call will be G4HSO/M on the water (/MM not technically possible). G4HSO when at home in the UK. 73 Peter G4HSO

Finished my RedPit WSPR transceiver (add-on board) for almost 95% and now is operating on 40m with 2W.
Currently it can also be switched by SW to 10m 1W.

The board is 160mm x 100mm and contains:

I had several more times where the Raspberry Pi seemed to lock up requiring a power cycle. I moved the micro-sd card to an older Model B+ single core board to make sure the Pi2 wasn't the issue. First thing I noticed is that the WsprPi program started normally and appeared by the screen output to be running, but didn't actually transmit as far as I could tell. I re-compiled the software and it again began transmitting.