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.

Another day with the trusty old FT-840 listening to 10 WSPR. Nothing heard. Nothing at all. Decodes on other bands, just not 10.


it seems my other laptop has issues.

i swapped out one laptop (w/ OS X) for another laptop (old Windows Vista). all other items in the chain are the same, cables, interface, radios, antenna. sending out 30dBm on the ft-817.

Tokushima (some 500km away) is hearing me and reporting me at different frequencies w/ different SNR. at first i thought there was a bug w/ the 1.7-rc2 release i'm using but the same issue occurs with the official 1.6 (r6263) release. my ft-817 is showing 0 bars of alc.

Sorry for reporting spots with wrong freq, my bad

I just tried sending and receiving simultaneous on the same band with a single antenna. I am using only a Red Pitaya and a S-match for a 2x20m Dipole. There are no other filters or any amplifications.
For splitting the antenna and for decoupling the receiver from the transmitter, I use a Wilkinson power divider.

As evidenced in the WSPR database, some US hams are transmitting on the default WSPR 60m dial frequency 5.2872 MHz which is outside FCC authorized 60m channels.

Some of the questionable 60m reports in the WSPR database appear to be uploads from stations with HF receivers that are not synchronized with the WSPR program frequency, such as in this listing

Hi guys,
I DL6OW starting today my third WSPR balloon STELLA3.
Ist an modified QRP-Labs Ultimate weights only 29g!
It will start from the german city Mülheim-Ruhr near the town Essen.

**** All informations and live tracking here: ****

If the balloon travel over 1000km, every spotter gets an Special QSL Card!
Rapports in JT-9 are also welcome at !!
vy 73 Dan

Raspberry QRP TX Shield arrived from TAPR yesterday. Just 4 commands to install the software, plug in the shield and antenna and it's running. Vey impressive.

The attached screenshot shows a series of nighttime spots between the UK and Denmark. I often see similar runs but to different Scandinavian locations. They are always very specific paths. My theory is that they are the result of E layer propagation from the northern wall of the mid latitude trough. This dips south in slightly disturbed conditions. Is that a likely explanation?

I have just completed the very simple installation of the new Sotabeams WSPRLite. Currently on 20m but conditions are pretty abysmal. Usual antenna in use (6 Band Hexbeam at only 20ft.)
Looking forward to doing some comparison tests with other antennas and beaming in different directions.

It's really nice to see so much activity on 160m.
This night we reached a new record with 796 dx spots "across the pond" just 10 days after previous one (784 dxspots Nov13/2016).
39 stations in the round (27 EU/10 NA)
10 NA stations heard in EU: K3RWR- K9AN- K9ANF- K9PAW- KD6RF- W1IR- W8AC- KK1D
3 EU stations heard in NA: DF2JP- DL3GAK- EA1FBU
To note George K9PAW heard by 14 EU stations, George running 1w, yes 1w !! and spotted by DL3GAK snr -14 (06:12z)

Good activity this night with 328 dx spots "across the pond" with 30 stations in the round (10NA/20EU).
10 NA stations heard in EU: AB4DF- K9AN- K9PAW- KD6RF- N2HMM- N9EMC- VE1SKY- W1IR- W8AC- W8OZZ
Curiously a one way propagation; no EU heard in NA !!
Best Rx stations: F59706(7NA), PA3FYM(6NA), SC0TID(6NA), G0LUJ/1(4NA), G0KTN(3NA), DL1GCD(3NA), DL1AS(3NA)
To note 3 "new one" heard for me (AB4DF, N2HMM, N9EMC) and a new count for my NA rx Challenge: 36 (21 in Nov2015)
We are now entering in the best period... so good luck !
73, Patrick

Maybe our (small) WSPR community already knows, but SWL Patrick F59706
from France challenges/d himself over the last years: Trying to decode
as much unique US/NA callsigns on 160m (1.8 MHz).

Innocent readers may think: "Why?"

From my perspective, trying to belong to the top world 160m contesters
etc. etc., my answer is simple: "Yes, this is really a challenge."

It's a challenge against (man made) noise and a challenge to
improve SNR receiver/-ing performance on Top Band (160m).

Most spots come from europe, the USA and VK/ZL.

Not much from the "millions" of African countries, or the biggest land mass called Russia.

Or even the electronics capitals of the world, Japan and China.

What up with the rest of the world ??

73 de Andy

I like try QSO in MF Opera / JT9 mode

Ive just returned to WSPR after 4 or so years. Im currently using a TS590 on a Cobweb antenna @10m for bands 10-20m and a 40m dipole @ 6m high.
Im looking to build an interface to allow my Clansman to use WSPR as it is a USB only HF radio. Perfect for the job!
If anyone has made a Vox for such a job, please send me an email.