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.

Using my trusty old U3 (now with GPS at long last) 200mW or 500mW on 6m and and 20mW on 80m into a dummy load dipole antenna I wanted to see how far I could get, first of all I received 878 spots in 24 hours. and my best spots were:

2017-12-10 19:42 DD5CF 5.366148 -25 0 JO30nq 0.5 EA8BFK IL38bo 3021

2017-12-10 08:28 DD5CF 18.106145 -27 -4 JO30nq 0.2 EA8BFK IL38bo 3021

2017-12-10 17:20 DD5CF 7.040145 -26 -2 JO30nq 0.2 EA8BFK IL38bo 3021

2017-12-09 12:32 DD5CF 14.097153 -23 0 JO30nq 0.2 SV1BTL KM17vx 1929

Finally got my Raspi-PI2 working a few weeks ago using the latest Raspi version of WSJT-X. Works fantastic with no issues. Setup is simply my PI2 with an RT Systems converter for rig control and a SignaLink USB for the sound card interface. Just attached a new Pi Zero Wireless with a MakerSpot USB hub in place of the PI2 and it seems to be working the same, speed and all. I am presently using an ICOM IC-703 that is dedicated for this project. I have been running 20dBm (100mW) for almost a year and today have decreased it to 10 dBm (10mW).

Hexbeam today into direction 270 degrees (Caribbean/North America)

I cut the drive level for the Si5351 in half, and added a 7 pole 20m low pass filter after the BS170 amplifier, dropping my output from 200 mW to 100 mW. This did help clean up spurious emissions. Then I raised my 20m inverted vee's shamefully low fiberglass mast from 16 feet to (a still pathetic) 24 feet. The net result is a cleaner signal, lower swr, and the addition of European spots. I also modified the Arduino code to randomize transmission times, so I'm no longer transmitting only on the 10s.

This is just too much fun!

I put up an OCF diplem on the roof disguised as part of the Christmas lights. SWR on 20m is about 1.2 so no tuner needed. We'll see what we get with just 20 dBm out of the whispering raspberry pi.


Good activity this night with 258 UNIQUE dx spots "across the pond" and 72 stations in the round (25NA/47EU).
This is the first really active night of the season; I heard 15 NA my best score in one night.

We are now in the best period so It's time to publish the current station score of the season from July 1st to December 5.

Best EU Rx: G8DYK (49NA), F59706(47NA), GM4OAS(36NA), G4WLC(35NA), LX1DQ(34NA), DK6UG(30NA), EA8BFK(30NA), G0KTN(27NA), G0LUJ(27NA), EA1FAQ(24NA)

I'm QRV this week from Laos. Will be trying a variety of bands.

Intermittent line noise that I need to track down on receive. Transmit seems to be working good so far. Dipole is at 10 meters high.

WSPR Bandpass

Lower frequency Upper frequency Bandwidth
1,4 kHz 1,6 kHz 0,2 kHz

WSPR Frequencies

I got my call sign (SV1CIF) in 1993, was born in Agrinio, where he lived until 2010, Agrinio is a small city with about 100,000 people in Western Greece. About 300 km from Athens, where I live now I am active in most of the amateur bands. I really like the hobby, the radio, and this is my main hobby since March 1993 I love to collect QSL cards. Always reply 100% all cards can reply directly papers the same day. Can I use LoTW (mostly) , QRZ and eQSL

QSL policy:

I'm normally running KiwiSDR with vertical whip tuned on 2,200m.
Three users can login without password whenever if solar power on.
Chrome or Firefox are usable at URL:

I added a 200 mW BS170 amplifier onto the end of the Si5351 and, lo and behold, the little thing can be heard on the west coast, and also in the Canary Islands.
I can only imagine what would happen if I could get the antenna a little higher off the ground.

Ham radio is cool!

I'm now using a ft817 and a 10db attenuator giving 50mw. Some Antenna swapping including EFHW Verticals

Today K8KSM heard my Raspberry Pi WSPR beacon. This is the first time someone in my same town has heard me. The previous shortest distance was almost to Cleveland (~ 100 miles away) ... So, I had been suspecting my random wire had properties that made it bounce up higher before going anywhere so most of the reception was from the signal traveling in the upper atmosphere. The usual close reception is Indiana or Michigan on 30 meters.

I added power levels to the transmit and receive station summaries. Each combination of callsign, 4 or 6-character grid, and power level (if transmitting) is counted as a separate station.

Transmit summaries for each different power level used by a station. Multiple bands grouped together then sorted by distance. Shows number of different reporters and total spots.