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.


i turn on my wspr station this night on 40M. You can send report via email :

Best 73 from F4CVQ

2W in a vertical antenna (2m from the ground.

For me activity and fun is still there and even better on 630m !!
To date i heard 65 NA stations on 160m and 10 on 630m (On Dec-25-2016, 61 NA on 160 and 6 on 630).
I hope your satisfaction goes in the same way you are rxing or txing !!
GL all for the rest of the season, great fun to come...
73, Patrick

Is there a way to correct reception reports in the data base? My fumble fingers showed quite a few spots last evening from my Yacht off the southern coast of Chile when it was in fact it was a grid square fantasy moored securely in downtown Tucson AZ. Cheers and 73, Jim

Nice wspr last night with my bitx40 did a great job of reaching out under 2w!

What happens to the decoding signal, with QSB?
The essence of the experiment:
Turn on the receiver in the given time and look at the WSPR decoding.
1) Receive for 1:30, 1:00 (full signal around 1:50). Decoded! :woohoo:
2) Receive for 0:30. Does not decode.
3) Receive within 1 minute, shifted relative to the start signal for 30 seconds, i.e. from 0:30 to 1:30. Decoded!
In the picture a visible signal (1:50; abbreviated: 1:30, 1:00, 0:30; 1:00 with an offset).
The result:

This last week something odd happened.

WSPRNET would previously (I think this is how it works) add the last two digits on my locator square if known in it's internal database
on my transmissions. ***( I only transmit, and with a bunch of G0UPL ULtimate TX's).***

It no longer seems to be doing this.

I am in JO01MI, it now only reports JO01.

The set up here is a pair of G0UPL U2 rigs, and a U3 rig, all with their own GPS (no single point of failure) and nothing whatsoever
has been altered with then for about 4 years.

We planed to put the HAB in the air !
I will launch another stratosphäre ballon similar to STELLA4.
The payload will have 2 Cameras on Board.
Also it will have the new designed WSPR PCB on board that will transmit at 30m.
You can track the transmission on CW at 10.139,950MHz, JT9 at 10.140,450MHz and WSPR at 10.140,100MHz.
Here is the link from the QRP Labs livetracking website that will be available short before the start :

Testing the code for an Arduino driven GPS timed beacon.

10mw from an SI5351, and into a QRP-Labs 20m Low pass filter.

The GPS syncs the time, figures out the maidenhead locator, and transmits on a pre-defined schedule -

USB powered via an Arduino nano.

I test WSPR beacon on 10M band. Beacon on Si5351+Arduino+BS170 AMP radiate only 10 mW. My antenna is wire 10 m long, 4 m upper the ground. Beacon is working two weeks continiously. Some spots:
2017-12-12 17:28 R2AJA 28.126060 -27 -1 KO85xt 0.01 PG0DX/1 JO33ce 2052 275
2017-12-12 17:04 R2AJA 28.126049 -26 0 KO85xt 0.01 OZ7IT JO65df 1608 278
2017-12-08 12:38 R2AJA 28.126028 -11 -3 KO85xt 0.01 OZ1FJB JO55si 1651 279

My 12/13 0144 and 0152Z 160M power was 1 watt, not 1 milliwatt. I was testing my Flex1500 and entered the incorrect power level. Naturally it happened during an opening to Europe. Sorry for the error. I'll stick with the WSPRLite from now on... 73 - Rick WB8JUI

Nice surprise before my sunrise (07:32z):
2017-12-12 06:48 HH2AA 1.838102 -21 0 FK38 5 F59706 JN07th 7365 46
I think it's the first time on 160m WSPR and i hope hear Haiti again in Europe.
73, Patrick

Using my trusty old U3 (now with GPS at long last) 200mW or 500mW on 6m and and 20mW on 80m into a dummy load antenna, I wanted to see how far I could get, first of all I received 878 spots in 24 hours. and my best spots were:

2017-12-10 19:42 DD5CF 5.366148 -25 0 JO30nq 0.5 EA8BFK IL38bo 3021

2017-12-10 08:28 DD5CF 18.106145 -27 -4 JO30nq 0.2 EA8BFK IL38bo 3021

2017-12-10 17:20 DD5CF 7.040145 -26 -2 JO30nq 0.2 EA8BFK IL38bo 3021

2017-12-09 12:32 DD5CF 14.097153 -23 0 JO30nq 0.2 SV1BTL KM17vx 1929

Finally got my Raspi-PI2 working a few weeks ago using the latest Raspi version of WSJT-X. Works fantastic with no issues. Setup is simply my PI2 with an RT Systems converter for rig control and a SignaLink USB for the sound card interface. Just attached a new Pi Zero Wireless with a MakerSpot USB hub in place of the PI2 and it seems to be working the same, speed and all. I am presently using an ICOM IC-703 that is dedicated for this project. I have been running 20dBm (100mW) for almost a year and today have decreased it to 10 dBm (10mW).