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.

Wanted to record my experiments.

Since upgrading to my general ticket, I've set up a 20m center-fed flat-top dipole in my attic, about 30ft above ground, with a 1:1 ugly balun.

But I had no radio to try it out with.

So after reading up, I set up my raspberry pi model B with a LPF connected to GPIO 4, feeding 50ohm coax up to my attic. The pi is powered through my Alinco 30amp power supply's 12v/5a output, using a step-down converter to bring it to 5v.

Had some interesting WSPR reports on 15m with Hisa, 7L4IOU, on 15m this morning.

After checking VOACAP and doing some research, I think these were long path reports. This would be a record WSPR distance for me at 30073km. Next highest is VK6XT on 20m at 22509km.

2015-06-19 14:44 7L4IOU 21.096056 -9 0 PM95wr 2 KB9AMG EN52tx 9991 33

2015-06-19 14:48 KB9AMG 21.096043 -26 0 EN52tx 5 7L4IOU PM95wr 9991 323

2015-06-19 15:04 7L4IOU 21.096057 -23 0 PM95wr 2 KB9AMG EN52tx 9991 33

Looking for some JA stations to Sked WSPR on 6 meters this weekend. I know several have exchanged decodes with VK stations, time for NA... Heck I'm feeling greedy, even 2 meters maybe. I've exchanged decodes with VK and ZL on 50 Mhz WSPR. I have 50 Mhz RX on 24 X 7 usally pointing to VK, but will turn my beam by request. Right now I'm pointed at HI for this duct that is open.


2 meter WSPR spots span the 4061 km between N3IZN in California and KH6IMB in Hawaii today
Read the discussion on!topic/2-meter-wspr/4WaqFZTfYoQ

Well after spending several hours in the shack with the kenwood manual on my lap, I finally have wspr working. I can,t see myself on the map despite the grid being correct but we will figure that out in due course.

I enjoy making antennas, so I am looking forward to see where the reports come from. Today I am using a 17M band homebrew delta loop.

to all

Well, I upgraded my Ultimate3S to firmware 3.08 ( thanks Hans ). When I first fired it up, the XMT frequency was so far afield that I had to manually make added corrections to what the HP correction algorithm was doing to get the radio into the ball-park. Now that the synth frequency has been properly corrected, it takes only one or two initial corrections when first fired up to get settled.

Hi All,
I am only in ET until Friday morning 12th June and will be listening all day today on 10m and then all day thursday on 15m
(tnx Patrick!).No tx again I'm afraid.
Unfortunately it's the rainy season out here and the internet is up and down and has failed totally at the rx QTH so I
will have to post the spots manually.
So, todays 10m spots hopefully posted tomorrow, thursdays 15m spots posted Friday...... etc.
I'm just about to try and download some spots from setup testing yesterday on 10m,
73 John G8DYK

im try make WSJT-X v1.6.0-devel under KUBUNTU 14.04
result - full make ok, but after start message "An error opening the audio input device has occured."

under "Mageia 4.1" - not found rpm "QT5serialPort" and stop make

I currently don't have an HF radio, just a couple of 2M handhelds, and I wanted to get on HF to exercise my privileges somehow. I found that you can set up WSPR with a Raspberry Pi (I have plenty of those!) so I embarked on this project to set it up and I thought I would explain what I did so others can benefit. This write up is going to assume you have some knowledge of the Linux command line (bash) and know how to navigate around as well as how to set up and use a Raspberry Pi.

The Falkland Islands (IOTA SA-002) is not a particularly long distance from Johannesburg, but it is my first contact with my new/old Flex-1500 SDR after settling all the arguments in the laptop's brain between the various softwares and VACs and VSPs and goodness knows what else:

2015-06-08 05:12 VP8ALJ 3.594094 -19 0 GD18bh 10 ZR6LU KG43 7517 105

I set up my 200mw Ultimate 3S outside this morning, with a 20m hamstick and wire radials. Less than an hour out I am spotted by TWO Australian stations... 7700 miles ( 12,400 KM ) ... I am truly hooked by this mode :-)


Hello All,

Following Joe's ( K1JT ) post about WSPR Mode in WSJT-X (, I've made available the packages (in PPA form) to install WSJT-X ( includes the new WSPR and C++ decoder ) and kvasd-installer to install the KVASD Binary used by WSJT-X.

As you may have heard, a number of us have been WSPRing from within program WSJT-X in recent weeks. Up to now you could do this only if you built the program yourself, from source code. Many people have been asking when a version of WSJT-X including WSPR might be made more widely available, so here's an update.

2 spots for a great day:

- first on 630m and later in the season
2015-06-02 03:00 WG2XJM 0.475775 -28 0 EN91wr 5 F59706 JN07th 6206 54
tnx Eric (NO3M- part 5 license)

- then T2RG (Bob-VK2RG)from Tuvalu rare dxcc on wspr
2015-06-02 12:26 T2RG 21.096175 -24 0 RI91 5 F59706 JN07th 15694 357
tnx Bob for the first effective dxped with wspr

73, Patrick, F59706


Summer is almost here and me and the usual suspects are back on the 'impossible' band. If anyone wish to take part, and need testing, want me to change frequency,etc, please drop me a mail(djchrismarc at gmail).

I am using omni directional horizontal antenna and i will try to be on the air almost 24/7(no tx when away, sorry).

Here my waterfall, updated every 60 seconds:

Use the F5 button to your heart content.

Here Brian's (G0MJI):

Yesterday I blogged about attempting to reduce drift by encasing the components of the Si5351A synth board with foam. In the long run, this approach had a discernible, yet minimal benefit.

Today I took the second approach I wished to examine. I took a nickel plated brass threaded spacer and filed a flat edge on it. Then I removed the top insulation from the synth board and attached the spacer, with epoxy, to the 27 MHz crystal on the synth board. I've attached a picture showing the modification. The white material on the board is residual latex caulk from the previous test.

I really like my Ultimate3S beacon... but the drift rate has been a bit of a bother. It has been hovering at -3 and -4 ever since I built it. I mounted my WSPR transmitter in a plastic case, and I thought it would be stable after running for an hour or so. It seems that the oscillator gets calibrated after a WSPR transmission, when it has been warmed up a little by the BS170 PA FET's. Then it cools a little while the FET's are off. Then it warms up again when the next WSPR transmission occurs.

I am very much developing an interest in digital modes. I have enjoyed playing with JT65 although it is a bit tedious and time consuming. It is very good at developing patience. I like the WSPR stuff because it gives me a handle on propagation. 73 and good luck


I'm up and running 24/7 on 6m, running 5w to a PAR Omniangle at about 10m. There have been a couple openings over the past few days, but the spots don't really reflect that.

I'm hoping that a few more US stations will be able to get up and running on a full-time basis.

73 - Al, K2ZN

Yesterday I fired up again the WSPR multiband beacon after changing the DDS AD9851 with a SI5351a OCXO.

The beacon is an Ultimate 3 with the OCXO mod to have a better stability.

Programmed through an Arduino Mega as ISP the firmware 3.08 to use the OCXO on the 328p.

Spent hours to calibrate the temperature of the oven and now I am very happy with it.

During the test the frequency stays stable varing 0,01 Hz up and down @ 10.140.265 after 1 hour of use.

The measured temperature in the OCXO oven chamber is around 47 degrees celsius.