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.

There's a bit of remodeling and reorganization going on, and I need to relocate the Raspberry Pi and co-ax that runs the beacon. Will be QRT today. Might off be a day.
Carry on,

PS. Back on line, and with 70 feet less co-ax, too. Still, a hamster could generate more than 10 milliwatts, but it's amazing what WSPR can do.


Ok, finally built the club project kit. First tried an untuned long wire. Currently using my dipole so will leave it running over night.

I think got call sign word set. What equipment do I need to Hook to my computer. So I can get going?
Or do I have the wrong settings.?

I am in the process of seting up my station as well as QRZ and eQSL accounts. I am absorbed in various experiments. Recently was climbing trees with my antennas.
Still waiting for SignaLink USB and some cables. So far my phone squeaks into microphone of Yaesu FT-818. The reception is on other bands with a separate antennas and SDRplay connected to the computer.
At the rural location of my station there is extremelly weak internet connection, hence some actions must wait. Everybody who is waiting for eqsl please forgive. I will send it a bit later. now fine. The trick: add your user to the group "dialout". Antenna is still the selfmade "Springy" indoor antenna as mentioned before...

We are very excited to announce the RFzero - a multipurpose Arduino RF platform that can do WSPR from 100 kHz to 1 GHz in a cost effective way and at the same time with a responsible RF spectrum and stability performance.

For more information please visit

You can use one of the dozen example programs or tweak them to fit your specific need for WSPR but also for CW, FT8, JT9 or PI4. Soon we will also have an example program for a QO-100 dual LO solution.

Now running DX Commander. Still working on adding 17M element and need to tune up 20 meters. 40, 15 and 30 are running well.

I built an endfeeded halfwave mono-band indoor antenna by uing a childrens toy from the 70ths: springy, the stair walking spring (picture). TRX is a qcx kit from Hans G0UPL, 5W. Got Iceland and Gran Canaria tonight :-D

Hope to see you, 73 de Tommes DD1TOM

Hello WSPR friends,

we have some standard filters that are available on database spot query function such as:

- Band
* dropdown fields = LF, MF, 160m, 80m, 60m, 40m, 30m, 20m, 17m, 15m, 12m, 10m, 6m, 4m, 2m, 70cm, 23cm

- Count
* input field integer values from 1 to 1000

- Call
* input field alphanumeric

- Reporter
* input field alphanumeric

- In Last
* dropdown fields = Hour, 12 Hours, 24 Hours, Week, Two Weeks

Hi all.
I just released my latest low power, low cost WSPR transmitter.
This one has a built in GPS with built in antenna and is optimized for low current consumption and weight.
It can be powered from a single LiPo or from USB.
It cost only 39$ and operate on a single band as set with a low pass filter (sold separately).
Any band from 137kHz to 70 MHz
More info here :

In the past week I've been using the new loop by ciro.The loop is on the lawn surrounded on the south by trees and houses to the west. The ear is at 1:3 to 1 using around 15 watts on different bands .



After much procrastination, I finally got my TAPR 30m tx connected to an antenna yesterday.

I didn't really expect much from 200mW going through an MFJ 945 match, a 9:1 unun and about 16m of wire slung off a 2nd floor balcony and temporarily lashed to an unsuspecting tree.

And roughly 12 hours later, here I am with hundreds of spots. Most are in Europe, but the best DX was a couple of VE's at over 8000km. WSPR (and TAPR): thank you. This is cool!