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.

I have built a stepper motor USB controller ready for a magnetic loop, but have yet to build the actual loop.

Since around 1 year I use WSJT for QSOs in meteorscatter (on VHF) and I am still surprised, what is possible with this fantastic software. Now I started to use MEPT_JT on shortwave. I am really fascinated what is possible with low power and digital modulation on the short wave. My antenna setup here is not really good, only a trap dipole around 6-7m high in a 90 degree mounting position. I'll try to be QRV 24/7, so my transmissions from Southern Germany are available for anybody out there.

In southern Spain until the end of December

As far as I did understood (TY1MS has no internet acces), the WSPR-beacon make some interference.
Thats why the WSPR-beacon is not always on, and the conditions are poor.
The first 18 spots was with 1 Watt, the rest with 5 Watt.
Lets hope that they have better conditions and can help many stations with a new country and more WSPR spots.

Many of us have a Multiband TX/RX which can run QRP but for WSPR a computer is needed in TX only mode which makes a mockery of the term QRP as applied to Station power consumption.

We have produced PIC based MEPT’s for Multi Modes and WSPR.

Some have recorded WSPR audio on MP3 and re-played that for Computer-less operation.

I think Computerless is a well understood term in all walks of life. Well this uses a lot less Computer than most. This uses a small PIC processor with no external memory, sound card, hard drive, video card, monitor, keyboard or mouse and has never had relations with Microsoft or Monica Lewinsky.
For the purists I shall say PCless in future, if I remember.

I have now produced the KISS WSPR Organ.

The name stems from my original idea of using a musical tone generator to produce the WSPR tone frequencies. Talking to an Organ engineer yesterday morning soon proved that approach to be far too complex and my simpler KISS idea was implemented.

The Output can be applied to any HF/VHF SSB Transceiver or better, a simple home brew SSB TX.

I noticed one of the 811's filament was open so I inserted a replacement. Apparently the replacement plate was shorted to ground and blew one of the 8 amp in line fuses. So I had to reopen the top cover to remove the bad tube but failed to properly tighten down the cover and the shorting switch was grounded. When I turn on the power smoke poured from the power supply section. An inspection showed two 10 ohms in parallel resistors blew apart.
Now I'm trying to locate replacement 10 ohm 2 watt carbon resistors. I will report next time after I replace the resistors.

as another Amateur has suggested use just one NPN transistor if you feel happy
with a connection between your rig and computer port.

Note: the higher value resistor between RTS and base of transistor.

Just depends what transistor you have from your junk box.

I have heard about 475 stations including of some fake callsign for my first one year with WSPRnet.
All station's callsigns have been listed at my Web-site: (Select WSPR experiments)
If your callsign was missing above, please let me know.
Rick 7L1RLL

DX contesters killed on plane crash...

More info at site of Southgate Amateur Radio Club at:

73 de CX2ABP.

I have running my Softrock 6.1 RXTX with PowerSDR40 and WSPR for about a month now and it works very fine and stable. For those who may be interested my setup is:
Antenna: 40m dipole low at about 7m above ground
Hardware: Softock RXTX Version 6.1 (80m/40m Version)
Computer: Pentium Core2Duo 5200 w. 2GB RAM
Soundcard: E-MU0202 at 96 kHz
Software: PowerSDR40 <-> VAC 1,2 || VCOM <-> WSPR

Hi All,
I am new to WSPR and trying to get started on 20m where I have been active using Digipan.
My problem is that although WSPR installs and I can get to the start screen - as soon as the RX starts the program crashes and I get the Microsoft 'WSPR encountered a problem etc etc.
I have tried setting my options differently; checked device manager; shut down other running programs - no luck.
I am running WSPR 1.12 on my Pentium 3.06 desktop with XP Home. Any ideas please?
73 Chris

Dear reader,

This is my second evening on 40 meters WSPR. As I write this, 5 stations are heard in Holstebro, Denmark (JO46gi). It is beginning to get dark, so I expect UK and Eire stations to surface soon.

My antenna is just 10 meters of household electrical cable on the floor (radial), and 10 meters on the roof. Not optimal - but it works for RXing.

I had some problemes when starting in this corner of the radio hobby.

1. What audio device to select?
Having downloaded and installed WSPR 1.12 by K1JT, I could not decide which audio device to select in Setup -> Options. When WSPR started, the command window displayed four lines:

Audio device 0; Microsoft Sound Mapper - Input
Audio device 1; NVIDIA(R) nForce(TM) Audio
Audio device 2; Microsoft Sound Mapper - Output
Audio device 3; NVIDIA(R) nForce(TM) Audio

Selecting device 1 for "Audio In" and device 3 for "Audio Out" worked for me.

2. How to get audio into WSPR

17 Oct 09
Operating 2W from Thousand Oaks California.
Antenna is a long wire.
Will decrease power to 1W or below as soon as possible.
Skype: "PatDarden" Mail:


Connect a short ground strap between the transceiver and computer. Connect radio's aux audio output to computer's line in, line out to radio's aux audio in. Use a pot at the radio end of the cable to adjust audio level for transmit. (Accessory plug in many ICOM radios). Connect 220k resistor from serial port RTS to base of NPN transistor. Add a .01 or larger cap between base and emitter. Emitter to ground. Collector to PushToTalk. Adjust audio levels to suit. Voila.