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.

Here are the results of the first transmit test of my new 160 meter quarter wave inverted L with elevated radials on September 9th. The test was conducted on 160 meters at 37 dbm power level over an approximate 12 hour period starting before local sunset and ending after sunrise. The inverted L is about 132 ft long. Vertical portion is about 70 ft. There are four 130 ft elevated radials at 9 ft above the very poorly conducting soil in the Green Mountains of Vermont. There is a 1:1 feedline isolator at the feedpoint.

Greetings fellow WSPR enthusiasts ....

I have been experimenting with ultra low power transmissions on 80M.
In particular, between my QTH (Saratoga CA, near San Jose) and a former marine radio station KPH.
KPH is located 123 km from here, heading 320 degrees, on the CA coast. (

For unknown reasons the propagation between KPH and this QTH can be exceptionally good
and quite repeatable. A Virtual Waveguide might be a good description.

Just got my WSPR on the air. Xiegu X5105 on an vertical Moonraker GPA-80F 10m AGL.
Make yourself heard!
/SA5QED David

HF is (slowly) coming back !!

Hi, I am qrv on WSPR not on a regular base but rather occasionaly. Yesterday when I worked on various HF bands, I found that radio propagation on the higher HF bands (21MHz and up) was excellent. So I decided to put WSPR back on the air once I finished qso-ing on 10m. I found that 21 MHz produced a few spots, where as 24,8 and 28 none. I may have to check the accuracy of my dial setting (calibration) on my Electaft K2 for the higher HF bands. 18MHz and 14MHz work fine! Have fun on WSPR everybody!! DL2GAN (using +33dBm, 2W on a 7m (21ft) vertical).

A time stamp-list of reports by DP0GVN, German research station at the south pole
51 spots:
Timestamp . . . . Call . . MHz ..SNR.D .Grid Pwr Reporter RGrid .km . az
2019-08-25 08:58 WB5WPA 1.838020 -26 0 EM13qc 20 DP0GVN IB59uh 13398 157
2019-08-25 08:40 WB5WPA 1.838020 -24 0 EM13qc 20 DP0GVN IB59uh 13398 157
2019-08-25 08:32 KF9KV 1.838029 -27 0 EN52et 5 DP0GVN IB59uh 14146 156
2019-08-25 08:30 WB5WPA 1.838020 -26 0 EM13qc 20 DP0GVN IB59uh 13398 157

A time stamp-list of reports by DP0GVN, German research station at the south pole
45 spots:
Timestamp . . . . Call . . MHz ..SNR.D .Grid Pwr Reporter RGrid .km . az
2019-08-22 08:56 WB5WPA 1.838020 -21 0 EM13qc 20 DP0GVN IB59uh 13398 157
2019-08-22 08:52 K9YWO 1.838180 -25 0 EN61fn 1 DP0GVN IB59uh 13949 156
2019-08-22 08:52 WB5WPA 1.838021 -20 0 EM13qc 20 DP0GVN IB59uh 13398 157
2019-08-22 08:50 K9PAW 1.838190 -24 -1 EN61ar 1 DP0GVN IB59uh 13980 156

Statistical analysis of WSPR reports over a two month period indicate that the actual relative gain patterns between antennas 1 and 2 correspond to the modelled gain patterns. The antenna model and simulation results were obtained using the Altair Feko antenna modelling software. Included in the model is the wooden tower and attached structure. The attached structure is a 10-12 foot wooden shed that houses the remote antenna tuner. The wooden tower has minimal effect on various antenna gain patterns, but it does have a notable effect on the each antenna's resonance. Resonance is lowered.


OK, it's a click-bait title, I confess :-),
It is about using Lasers to transmit WSPR.
Pretty cool regardless, more info on my blog


New to wspr, i m happy to try it and see that 5w of power can be heard so far away !
see you on the waterfall
Jean-Louis F1IEE

From 2019-07-25 until 2019-08-10 I'll be operating from the Baltic Sea coast (JO45rd). Rig will be FT-857 (up to 40 dBm) into a matched 6.3 m vertical.

Just curious what kind of antenna you are using on 160 meter WSPR band.

73, Jim WB5WPA