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.

Please note 80m frequency change to 3.5686 MHz (USB)

Please note, the WSPRNet site has been updated to reflect the change to the 80m WSPR frequency which is now 3.568600 MHz USB.

Thank you to K1JT and G4ZFQ for pointing this out.

73 Gary W1GJM


[From Admins] Map issue -- a fix of sorts

The issue with the Google Maps is related to the change Google made on July 16th, 2018 that severely curtails the free API limits. WSPRNet will be transitioning to an alternative mapping solution as soon as possible.

In the interim I have added a new field to the User Profile form for storing your own Google Maps API Key, if you want to get back to the way things were. You can get your own API Key by following the link below and I would strongly encourage you to read the Q&A down the page.

Hi all.
I just released an expansion card to my WSPR-TX_LP1 transmitter.
It expands the transmitter with four switched low pass filters.
With this combo the transmitter forms a standalone WSPR transmitter with on-board GPS that can do band hopping on four or more bands.
It is possible the lowest cost multiband WSPR transmitter available today. And it's Arduino based with open source.
I hope you find it interesting.

I wonder if it is possible to design a wspr qso mode that allows multiple stations to handle the communications, as in this sketch?

I have been watching 40 meters mostly on wspr mode. 40 can be really excellent at times. I jump to other bands once in a whole to compare. But always seem to come back to 40 meters.

Currently I am using a KiWi SDR for the WSPR project. I am trying to have a minimum of 3 decodes running 24/7 on the long wire antenna.
I am rotating trough the bands, VLF up to 10 Meters.

The API fix works fine. Google says when you enable billing, you get $200 free usage every month for Maps, Routes, or Places. Based on the millions of users using our APIs today, most of them can continue to use Google Maps Platform for free with this credit. Probably won't cost anyone a cent.

My name is Tim, I live in Jackson , Mi. my Rig is Yaesu ft-991 and Kenwood TS-480SAT
been Licanced for 46 years i doint look Back, I love ham radio
73 to all

Tonight, I've looked for WSPR spots on LF, MF, 160M.
Strange spots I've seen.
Callsigns, powers, distances is fantastic!
Here It is:
Timestamp Call MHz SNR D Grid Pwr Reporter RGrid km az #
2018-12-30 05:18 O12TUC 0.137486 -29 0 KJ57 0.05 DL0AO/2 JN59vk 4997 342 1
2018-12-30 05:18 BJ3EQF 0.475617 -30 0 MH76 0.02 N2BJW FN34im 15444 325 1
2018-12-30 05:54 027FYN 1.838154 -29 0 KC19 100 OZ7IT JO65df 12905 353 1

Merry Christmas to all around the world !!

From WSPR 3.0 User’s Guide we know that computer clock must be correct to within about ±1 second.
I've tried to test it and find practicullar limits of error.
First PC is receiver, and have internet time sinchronisation.
Second PC is tranceiver and I setup clock as I want.

We can compare DT parameter on first PC, and get or get not spots from other WSPR world stations.
Band is 40M. Power is 0.5 W.

Accuracy clock manually setup is near one second.

Congrats to the guys who made it across the Tasman sea today on 2m WSPR.

2018-12-14 01:34 VK7HH/P 144.490500 -18 -1 QE37ld 50 ZL2IT RF80km 2519 km
2018-12-14 00:36 ZL3PX 144.490520 -15 RE66hm 5 VK2KCM QF56po 2161 km
2018-12-14 00:50 ZL3PX 144.490539 -16 1 RE66hm 5 VK2DVM QF56og 2144 km

This is just the beginning. We need a lot more stations active, if anyone has a good reference locked radio please join in and help us cover ore area and get more paths through.

A big round of applause to the following stations who conquered the Pacific Crossing tooday on 6m WSPR -

2018-12-14 00:50 N3IZN 50.294508 -24 0 DM13ji 50 VK5BC/P PF85mc 13347 km
2018-12-14 00:50 N3IZN 50.294501 -24 0 DM13ji 50 VK5ZK PF94jl 13226 km
2018-12-13 23:30 N3IZN 50.294505 -24 0 DM13ji 50 VK5AKK PF94ix 13212 km
2018-12-13 23:30 N3IZN 50.294523 -23 0 DM13ji 50 VK5PJ PF95mk 13164 km
2018-12-13 23:46 N3IZN 50.294521 -23 0 DM13ji 50 VK5LA QF05gq 13026 km
2018-12-14 00:14 N3IZN 50.294518 -18 0 DM13ji 50 VK3WE QF32se 12612 km

1) We can't receive second and higher harmonics of WSPR signal because
a) Subband's WSPR is not multiply on different bands.
Example: CW Signal 7030 KHz, second harmonic is 14060 KHz may be received by skimmers or operators.
WSPR signal 7040.100, second harmonic is 14.080.200 and not in 14.097.000...14.097.200 subband.
b) Four frequences of WSPR signal will have wider step in higher harmonics and could not be decoded.
See WIDER-2F-wspr.PNG

due to the situation that hams have to use two different frequencies for wspr activity on 60m, I tried to configure my equipment for decoding both signals at the same time. In Austria only RX is permitted on 60m :(
Flexradio 6300:
Slice 1: RX - Audio DAX RX1 - SmartSDR COM 4
Slice 2: RX - Audio DAX RX2 - SmartSDR COM 5
more tricky was to start wsjt-x in two instances.
Thanks ve2ebk for the post in FT8 Blog.
first instance in the windows cmd window with wsjtx
second instance with wsjtx -r=2