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.

Hi all,

Dave VE3KCL's Balloon S-7 with QRP Labs kits and firmware onboard for tracking, was launched 11-Mar-2016 13:00 UT. It is now mid-Atlantic, making very fast progress East.

More details and live map tracking:

Completed, thanks to nice HFBEACON library from F4GOJ, was using AD9850 DDS, additionally added DS1370 clock for WSPR time sync, on very short mobile vertical and output power less than 1W was heard across Europe on 20m.. -- 73, Alex.

I launched a 36-inch Mylar party balloon carrying my 18 gram WSPR transmitter on 20m from Huntsville, AL last Sunday, March 6th. It is currently over the Atlantic heading towards Europe. The power output is 20 milliwatts into a magnet wire vertical dipole. I am using the WSPR power field to indicate altitude in 500m increments. So NO I am not running 500 watts on WSPR, it just means I'm over 8500 meters in altitude. The callsign is WB8ELK. I also port the WSPR data to APRS.FI under the callsign: WB8ELK-7. - Bill WB8ELK

Quite chuffed with my project and managed to be heard in VK. Very interesting mode and educational to build.

Currently I'm using an inhouse Magnetic Loop antenna with 0,5W RF from a Flex-1500 SDR trx. Mainly tx-ing on 20-30-40 meter. The loop is made from 20mm wide aluminium strip with a diameter of 1.3m, fed with a gamma match. It hangs in the attic at 3.5m above sealevel. I'm very happy with the results!

Set up WSPR a long hour ago but am not showing any reports/receptions in PSK Reporter.

Just a reminder that the Equinox is coming up. Will be one of the better times to try get from EU to VK on 6m WSPR.
Im monitoring 6m WSPR every day (along with 10m and 2m), and always looking for EU paths in my afternoon/evening hours using a 6 element Optibeam yagi at about 80 ft up. So if stations in EU and surrounding areas can focus in this direction we can give it our best shot.

160m season continues to provide new DXCC.
Following French Guiana (FY5KE) and US Virgin (KP2XX) United Arab Emirates was now heard for the first time on 160m wspr in Europe by some lucky stations, John(G8DYK) opened the way:
2016-03-01 17:46 A65DC 1.838093 -21 0 LL75ob 5 G8DYK IO85te 5706 322
2016-03-01 19:54 A65DC 1.838094 -23 0 LL75ob 5 ON4LUC JO20 5109 317
2016-03-01 19:58 A65DC 1.838095 -28 1 LL75ob 5 G8DYK IO85te 5706 322

How to extract a logfile for a given call sign out of the huge Wsprnet historical database ? This was the brain exercise of the last week. And I was amazed to find that with a short program coded in python language the solution was easier and simpler than expected. My friend Ivo, IW1PAK was so excited of the result that convinced me to publish the program and explain it in the best understandable way for any one so that other WSPR users can play with it.
How does it work ?

My new home made SDR TRX with max 5W out is now online.
The TRX is made with the "Red Pitaya" Board and woks in WSPR very fine.
I will be bands from time to time.
73's Joe

After about 3 evenings of pain and tears trying to compile WSJT-X on an Odroid XU4 it is now up and running!

So this is now my RX-Setup:
- Mini-Whip antenna
- Kenwood TS480-SAT (remote controlled by WSJT-X!)
- Odroid XU4 running WSJT-X

Next goal: get SDRplay running with Odroid XU4 - that would be a nice and compact WSPR-RX combo... :-)


This summer I have been trying to get some activity on the two metre band. In the past I have not observed much activity in New Zealand but recently ZL2IT and ZL3PX have been on regularly, and exchanging reports. I have recently joined in, and another wsprer I have seen is ZL2COM. These station seperated by long distances, the shortest path I think is from ZL2COM to myself about 200 km.


We are currently working on a WSPR tracked buoy. These posts will be to share our progress with anyone, and keep a reference for us so we know what we did so we can create more.

I am a member of W1HLO, the Norwich Free Academy High School Amateur Radio club. One thing that our club likes to do is tracked beacons. We've launched three weather balloons, one of which was very successful and traveled from Norwich, CT to Canaan, VT. This year instead of a high altitude balloon we decided to build a buoy which we would release into the ocean and then track its position.

In the past I had an Elecraft K3 and was able to transmit and receive WSPR just fine! Now I have a new Elecraft K3S that I am unable to transmit a WSPR signal!
I have spoken to Elecraft and they can not help me with this problem. Can anyone help me with this problem?

Larry Putman WB3ANQ