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.

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.

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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.

Hi. I'm building a RPi3 based 160-2m automated WSPR TX/RX station. Some parts of this may be of interest to others. If that is the case I will post updates as the work progresses.

The project aims are as follows:

Have been wanting to try WSPR for a while and finally got some time to set up a Raspberry Pi board with a TAPR WSPR-Pi hat set up. Running my first test today, I am getting many far away reports on my signal which is very exciting.

I have been active on WSPR for a couple years, but have just recently found the time to sit down and do it right. My shack is in the mountains of Colorado, USA, at an elevation of 8,064 feet above sea level. I have lately been using a Yaesu FT-890 as my WSPR rig, since I can adjust the output power down to a QRP level. I have recently also discovered that the antenna I rigged up to try to communicate locally on HF -- a one mile barbed wire fence, fed with about 600 feet of old 4 pair armored telephone cable that was left here on the property some 22 years ago.

Online on six bands (rx only) - 1.8, 3.5, 7, 10, 14 and 18 MHz

Hardware: Raspberry PI 3 model B + 2xSTM32F373 boards + six receivers (with SI5351 DDS).
Documentation is here:

Begin at 21.02.2017 / 8AM local time / 0700 UTC
with 5 Band KW wire
Tx 200mW

Using 100mW on 20m through the EFLW today.