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 just released my new WSPR Desktop transmitter.
It is an open source Arduino based transmitter just like the previous one.
This one comes built in a box with four low pass filters and covers either 137kHz-3,8MHz or 7-18MHz or 21-50MHz depending on what model you order.

Configured from a PC software but will operate standalone using it's built in GPS for time keeping and position.
Powered from 5V USB so it suitable both for the shack and on the road or hike.

Like many other WSPR'ers I have gone SDR. Recent 3 band spots have been from a KiwiSDR , a nice tool.
But from now on (5th November 2018) the RX is a Red Pitaya board running Pavel Demin's exceptional software on eight bands LF and up, I will continue using my 50cm. E field antenna which works very well and is almost invisible. Pavel has been very kind in assisting me over a silly set up error that came from You Tube!

I have been experimenting with my airspyHF+ for a couple of weeks now. It is a very nice device and I have been using gqrx on my linux laptop to view the entire 20m band, listen to QSOs, CW contacts and beacons. I've also used it to identify a few sources of strong QRM in my house.

Our URE LEGANES fellow EB4CUV, is doing an OFF ROAD trip.
Accompanied by QRP-LAB beacon U3 and MFJ antenne run on WSPR 30m every day, wiht very good reports.
GL & 73 de Alberto EA4GHB

On my systems, I got rid of that annoying "Development Purposes Only" message on the Maps produced on this website.

So, I use an Ad Blocker with Firefox. Yes, it's called AdBlock Plus. I don't use the latest "upgraded" FireFox, as it appears that the Crack FireFox Team destroyed all of FireFox's AddOn capability (which is what AdBlock Plus apparently is...). I don't know if there is a new version of AddBlock Plus that works with the new FireFox clunkware.

I'm pretty new here, and have been amazed at how many contacts I've already been able to log.
But even more exciting than the number of contacts is the variety of them: I regularly get
contacts from Japan, Antarctica, Hawaii, New Zealand and even the Cook Islands, all on 5 watts. Wow.

First TX
-100w dbm

Second TX
-50W dbm

October 16th 2018
1/2 wave inverted V @ 50 ft

Grid FN41 Smithfield, RI

I added a new 7-day km/Watt transmitter rankings list to the top of the km/Watt pages.

On 17m, DL6NL has the highest total (almost 3 times as much as the next highest station).

The rankings are based on the last 7 days of wspr reports and add all the km/Watt values of the unique reporters hearing the transmitting station each day.

Rare Haiti station on 160m wspr heard by all Europe:
2018-10-07 03:32 HH2AA 1.838099 -22 0 FK38 5 OZ0AP JO65eg 8042 37 1
2018-10-07 03:32 HH2AA 1.838100 -27 0 FK38 5 DL1SEH JN48pq 7922 44 1
2018-10-07 03:32 HH2AA 1.838092 -25 0 FK38 5 PA5GB JO33kd 7708 39 2
2018-10-07 03:32 HH2AA 1.838099 -28 0 FK38 5 LX1DQ JN39cq 7688 43 1
2018-10-07 03:32 HH2AA 1.838101 -24 0 FK38 5 F59706 JN07th 7365 46 1

Just got one set up for WSPR reporting, will set another up for public access soon.


My name is Marc Call F5SHN

After about 3 years of requesting an improvement to the database search facility we still have no action in regards to this.

It was hoped that when extra admin people were implemented last year (I think it was) that it might have been easier for this to happen, but as yet I've not seen any change in the ability of database searches.

124.5' of 12 AWG solid copper clad steel wire, sloping upward from about 10' to 30' in the direction of 315 degrees (Nort-West), using a Balun Designs Model 9135sw 9:1 Unun, connecting with 120' of LMR-400 Ultraflex Coax cable.

It's hard to see the copper wire that extends 125' away to the top of that large tree in the center of the picture.

Not shown: Balun Designs Model 1116du 1:1 Maxi Choke Balun and Ameritron ATR-30 tuner.

I'm playing around with the data from two months I downloaded from here. At present, I'm just familiarising myself with the stuff. Here's a table of the mean signal strength reported by Reporter. It varies hugely, and it might be interesting to investigate why. I have cut out those reporters with less than 100 entries.

Here are the top few in August 2018.

Reporter/Average report dBm/Number of reports :

2018-09-09 11:34 WA1ES 14.097098 -21 0 EM56wl 5 G4ZFQ IO90ir 6757 46

I am registering a misuse of my call sign today. I have not done any recent testing on 20m. I have not transmitted on any band today 2018-09-09.

I would hope this is either a database corruption or other user error.

Please be advised I will continue to monitor for any other occurrences of my call sign use.