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.

While visiting friends out in the country, I noticed an old vertical antenna stacked with some plastic pipe and managed to talk them out of it. They were happy to get rid of another piece of scrap and I have a plan for t, already. Originally made for use on 11 meters, I realized it should be simple enough to convert it to work on 10 meters and maybe even tune it for 20 meters, so I began working on it. The mast itself had at some time been replaced with galvanized electrical conduit, which was corroded, so that will be removed and replaced with 3/4 inch copper pipe of the correct length.

Just re-checked the map and I have entries for the QRPGuys EZ WSPR-PI from Illinois, Alabama and Georgia!

Not bad for an estimated 80mw transmitter and an OCF dipole with no tuner.


So, I recently reworked my 'snake' antenna that is merely about 600 feet of two pair armored telephone cable. I terminated it by wrapping it onto the top wire of a barbed wire fence down by the road and drive it at 1 watt from a Yaesu FT-890 with an on board tuner. I didn't expect much, but am pleased that it produces better results than a handful of Hamstick verticals mounted on the house. Next, I'll probably try to use that wire on the ground to work FT4 and FT8. Nothing to lose, I guess.

Finished the WsprPi hat and added it to the Pi 3 B+. All seems to run OK, but nobody seems to receive the (100mw?) transmission. My local HF rig with a junk antenna heard it and it decoded ok in WSJT-x. Oh well, more troubleshooting to follow. I'll try 5w with my base and make sure that's working OK tonight.

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