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 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.

Ok Life`s too short for QRP? A stated and known way of speak... But correct? Do`nt think so! Now i`m a pretty young man and may see things abt different ok? So here we go as stated. Now i`m not the type to fiddle inside the radio, nor attemting to homebrew any interface. But i know where to buy`em (good way to start anyway HI) Don`t get me wrong, i love my seldering iron.... but that reguards antenna work... coaxial cables and so.
So why here.. Where else to fully test the antenna designs? i ask... Where else you got the repply mesured in db? WISPR HURRAY !

Just downloaded HRD and ordered an interface. active within the week (I hope).

I decided to participate in the 160m test.
I strung up a 135 foot doublet which I bought
15 years ago but had never opened. Right now
the ends are up about 30 feet and the center
is about 10 feet. The ladder line comes in
the window sill wrapped in a plastic shopping bag.
Most of the 100 feet lies on the floor in a

in the next couple of days we should see first signals from Namibia V51
It is OE1IFM and OE1CSC who will install the new beacon system, that has been built and sponsored by Om Gernot.

vy 73 de Mike

Like to get on WSPR with your homebrew rig? Looking for a challenge that goes beyond simple plug-and-play?
Then you should consider the GenesisRadio kit: G3020 is a multimode, 30m+20m duobander with 5W output. Yes, G3020 is no beginners kit but if you are clever and possess good soldering skills you'll get it right too. Homebrewing+QRP=Fun! For more information visit
73 Nick VK2DX

PS here is an unsolicited report from yet another happy builder:

Hi you all out there,

I have cut a 30m half wave antenna, which is connected to the match-box of my PAR End Fedz antenna. The wire is still indoors, strung down the hallway, and dangles down the stairs, but it seems to work fine. I soon got it on frequency with my home brew antenna analyser. I still want to build and try a magnetic loop to see how the two indoor antennas compare. Will probably use 15mm Copper pipe with mechanical compression fittings, rather than having to buy a blowtorch and flux to use solder joints.

I carried out my first WSPR tests this evening on 30m. Rig is an Icom IC-746 running about 5W, or at least as little RF as I can, and the antenna is an American PAR End Fedz 40/20/10. It runs from the upstairs spare bedroom 'shack', and is tacked to a door frame. The wire then runs down the length of the hallway, then down the stairs towards the front door of our small house. Hardly ideal, and besides, the antenna is nowhere near resonant on 30m with a very high SWR.

Nevertheless - I was heard in Japan, ZL, and USA, and was also hearing stations bordering the Pacific. Not bad given the antenna restrictions!

I hope to either fit a resonant 1/2wave indoor wire up for 30m, or alternatively build a magnetic loop for indoor use that I can tune up on 30m.

I dug out an old PC today so I could run WSPR and already I'm hooked.

Just watching those callsigns roll in on 30m is addictive.

Now I need to figure out a serial port to PTT interface and I can see how far my signal will go.

This is magic.

Hi all,

started using this nice piece of software this afternoon. On 40 mtrs they heard my QRP 8 watts in VK land, on 30 mtrs both me and K1JT heard each other. Not bad for an OCF wire dipole.


Nice Mode, immediately successful with FT-817, some wire and homemade audiocoupler. Decoded ZL on 30!