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.

RaspberryPI AD9850 Excalibur home CB ants (11m)

2015-07-22 13:42 WD4ELG 14.097091 -25 -1 FM06be 0.01 W6YQ DN84ic 2166 301

Can't believe that I am being heard with that little power. Measured with LP WN-2, not guessing at 10 mW. 135,735 miles per watt.

FYI my station (70cm & 10m bands) is OFF AIR until I can fix my PC. It wont switch on again after being shut down yesterday while there was a power outage.
Possibly a power supply or switch issue, I hope to get it going again ASAP.

OK, made the 200mw transmission with a maximum distance to 18403 km I heard ZL1RS practically use a multi-dipodi under the roof, you can not get this in a system of this so far.
The next step is to reduce from 100 mW to 50 mW 0,001mw and see what happens.
10/04/2015 20:56 IK1HGI JN45jj 14.097144 -10 0 +23 0200 18319 11383 ZL1RS RF64vs
73 ik1hgi Antonio

I've been playing with a Moonraker Whizz Loop for a while. Nothing I've been doing is fully scientific but it seems that the supplied loop is too small for 20m. Not really a surprise and my results really improved when I attached a larger wire loop (approx 3m vs 1.4m supplied). But using a loop using rg58u or rg213u did not seem to improve things further. I swapped to a MFJ-932 loop tuner and I expected an improvement but experience so far suggests the Whizz Loop is better.

Up and running wspr2.12 on 40m and 20m using a recently built peaberry V2 SDR. Running 1 watt into a multiband vertical/mfj versa tuner combo. Thrilled to be heard by KK1D on 40m last night and this evening getting reports from europe on 20m. Obviously spotting here aswell with lots of reports uploaded. attaxhed is a file showing unique calls hearing me. Regards to all.


The connection happiest day of my history of Digital WSPR using the antennas under the roof for little space I have no other atternativi I could have fun just wait propagation good with power from 0,001 to 200mw
THE good connection and it was on 475.700 Khz WSPR until today I did not get dressed who had the reception in April 30, 2015 hours 18.51 who connected ?? Thanks for sharing IK1HGi
IK1HGi Antonio

Interesting waterfall of WSPR transmissions from VK3DXE

Event of the night, for the first time Falkland isl. was heard in EU in 160m wspr:
2015-07-16 02:18 VP8ALJ 1.838094 -25 -1 GD18bh 10 G8DYK IO85te 12937 32
2015-07-16 02:18 VP8ALJ 1.838095 -23 0 GD18bh 10 F59706 JN07th 12377 39

I'm really please to see John(G8DYK) in the log too!

Beside that i was lucky to hear K9AN, K9PAW and K9YWO in my sunrise window.
The beginning of my 160m season is very surprising.... we are in summer and NA dx spots are ahead of one month !!.

GL to all, 73, Patrick

Heard by VK6XT, basically my antipode. Can't get any further away than that. I have maximized the distance.

Next step is to reduce from 100 mW to 50 mW and see what happens.

2015-07-15 07:40 WD4ELG 14.097081 -22 -1 FM06be 0.1 VK6XT OF86td 18403 274

2015-07-14 06:12 WD4ELG 14.097092 -24 -1 FM06be 0.1 VK7BO QE38mo 15958 247

TS480SAT, 100 mW, SignaLink. But I must confess that I am using a Hex Beam at 40 feet. That's a definite advantage over a wire antenna.

This time on 20 meters, not 10 meters.

Last few days I was listening to 160 m overnight. With great surprise the first spot of my new 160m RX Challenge season came very early compared to 2014 (Aug08) and 2013 (aug24). The goal is to spot (Rx) the greatest number of UNIQUE CALLSIGN of North American station (W and VE). The previous season I had reached the number of 36 unique callsign.
This night, I heard Tom several times:
first,2015-07-13 02:52 KJ4YBS 1.838101 -26 0 FM28bh 5 F59706 JN07th 6137 54
last, 2015-07-13 03:54 KJ4YBS 1.838102 -26 0 FM28bh 5 F59706 JN07th 6137 54

Listening all your whispers for the first time today!
Fantastic experience with a return via the ipad app.

Using here in Belgium a small GP portable PAC-12 with an IC703. The antenna is at ground level and has a length of about 4 meters with a central coil that needs to be adjusted with a clip to the appropriate band.
No transmission yet.

Very surprised to capture JA and K stations tonight on 20m.

By Anthony F4GOH and Christophe F4GOJ.


Hardware list :
  • VHF Beacon and APRS Tracker
  • HF Arduino Vna.
  • HF multimode beacon v1.
  • WSPR message Encoder.