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.

Excellent night session on 160m WSPR

Excellent night session on 160m WSPR with great opportunities and so, great spots!!:

2013-09-01 19:54 ZS1LS 1.838070 -25 0 JF96fd 20 F59706 JN07th 9181kms
2013-09-02 04:00 W1FVB 1.838062 -21 0 FN44ej 5 F59706 JN07th 5467kms
2013-09-02 04:00 VE3SWS 1.838105 -24 0 FN06ge 20 F59706 JN07th 5882kms
2013-09-02 04:04 K4RCG 1.838096 -23 0 FM08xl 20 F59706 JN07th 6278kms
2013-09-02 04:38 K9PAW 1.838188 -26 0 EN61ar 1 F59706 JN07th 6723kms

This morning greyline gave me 3 new NA Callsign to my 160m wspr Challenge.

I want to thanks all and hope soon same conditions to spot you with lower power!!

A warm hello to my friend George (K9PAW) still on air with 1W !! : i spoted him for the third season.

Seven European stations have taken advantage of the same opportunities so congrats to all.

Best 73,




Crossed Field Loop "CFL" Testing

Hi Chaps,
Ran the CFL last night on rx test, with a very low tx ratio. This CFL is now mounted at approx. 8 meters ( 25 Feet ) above ground. It was setup up on 7.040 Mhz, where the bandwidth is much more than I expected, over 100 KHz. This little aerial is only 40cms (15 inches) in diameter. With this setup in the horizontal mode, this tiny aerial heard two Vk's and several east coast stateside stations plus various European stations. At Midnight 31st August this little setup goes on line for an extended test on 7Mhz.

( Softrock Ensemble @ 500mW )

( Homebrew CFL )

( WSPR V 2.21 )

CU on the map Paul G4HDS

WSPRnet Spot Data Application to other Communication Modes

This modification to GM4ISM's Excel Spreadsheet polls real time WSPRnet data and estimates the signal path quality for various communication modes: WSPR, JT65, Olivia, PSK31, CW, RTTY and SSB. These charts show expected signal dB over threshold on these modes with user-defined transmitter powers and relative antenna gains. The values below threshold are in red, above 6 dB in green and intermediate in yellow.
Note: This Microsoft Excel spreadsheet requires support for Visual Basic macros and may not work with some Excel program clones.

Screen captures at

First time on WSPR today. was heard in Israel.

Running 3w to ATAS-120 mobile antenna on 20m daytime.

First try on WSPR

Tried my first ever transmission on WSPR this evening. On the very first TX period I got this:

2013-08-26 18:10 G0LRD 14.097194 -24 0 JO02 1 HS0ZLG OK03gr 9435 74

9435km from 1W into a poorly positioned 20m off-centre fed dipole. Very pleased!

Pro am 17m vertical.

Today 24.8.13 using a Pro Am 17m band mobile whip.

Early departure in 160m wspr

I spotted this morning, with a little advance, my first North American station of my new season in 160m WSPR, as usual in my gray line:
2013-08-24 03:54 VA3MW/P 1.838148 -22 0 FN04qm 5 F59706 JN07th 5930 56
2013-08-24 04:06 VA3MW/P 1.838148 -21 0 FN04qm 5 F59706 JN07th 5930 56
2013-08-24 04:14 VA3MW/P 1.838148 -17 0 FN04qm 5 F59706 JN07th 5930 56
2013-08-24 04:20 VA3MW/P 1.838149 -16 0 FN04qm 5 F59706 JN07th 5930 56
2013-08-24 04:30 VA3MW/P 1.838149 -17 0 FN04qm 5 F59706 JN07th 5930 56
2013-08-24 04:36 VA3MW/P 1.838149 -19 0 FN04qm 5 F59706 JN07th 5930 56
2013-08-24 04:42 VA3MW/P 1.838149 -28 0 FN04qm 5 F59706 JN07th 5930 56

I hope to do a great new season (27 unique NA call on the previous season) and see again all familiars of this nice band.
73 to all, Patrick, F-59706

Just getting back on!

For the last year or 2 I have played with WSPR, but never had a dedicated WSPR station. I have one set up now and will let it run for when I am home. Its tough going from a non-digital mode station to a digital mode station and makeing sure all settings are correct, as far power and audio levels. I am using an MFJ-249 radio interface card as the interface. This is a little dated, since it interfaces VIA serial port as the PTT.

Hope to hear everyone on the air!


Crossed Field Loop "CFL"

Used the antenna analyser tonight to setup the CFL on 7.040Mhz , then just for a quick test I left it running on RX on 7Mhz.
Most surprised to hear signals from around Europe, the CFL is just 40cms in diameter and its just plonked on the shelf next to a netbook and softrock ensemble, and all at ground level. Should prove an interesting test when its mounted on the house apex at approx. 5 meters.

Regards Paul..

Sample Rate Synchro between VAC and Windows 7/ Vista

I found this article/ adjustment to be very helpful, I had a sideband/harmonic about 100KC high that I could not get rid of, this sample rate synchro procedure cleaned it up. Thought it would be a good idea to share with the group, in case other's are having similar prob's.

73, John

Anyone transmitting below 10,140,100 Mhz (30m) ?


As I understand it the 30m WSPR subband ends at 10,140,100
although I know that the WSPR software includes a little bit
of overlap by default.

Unfortunately QRSS activity tends to start below 10,140,100Mhz
and there seems to be a few users using WSPR below the accepted sub band.

It may be a TX error and users not aware of it, but it would be nice
if WSPR'ers could bear in mind the QRSS activity below 10,140,100 please.

Kind regards,


WSPRing overnight

Ultimate 2 QRSS kit 100mW into G0FAH dipole up 45'. 20m 14097090


Thank you for looking me up on here but please do go look me up on and leave your call sign in the web button.

WSPR/CW beacon test operation

10.8.2013 I have started a test operation of simple homebrew DDS beacon. It currently operates on 6m only (WSPR and CW FSK 50.045 MHz) using 5W to 6 ele Yagi (heading mostly NW) from my home QTH but it is able to work on all HF bands as well (planned 80 and 17m), I will try it later. Plan is to move it to more convenient location later. Time schedule: there is a table with 10 timeslosts, each lasts 2 minutes. There are defined a mode (WSPR or CW) and freq for each slot. The timeslots are processed cyclically (that means sequence repeated every 20 minutes).

Compact Aerial Test

Hoping to be able to do some tests on 40 meters starting in September, running small compact aerials such as the CFL and EH etc

regards Paul.

Costa Rica info.....

Costa Rica TI (tango india) is a country with a few, but dedicated,
amateur radio operators. We enjoy WSPR-PSK-CW, always learning and helping... any questions??
73, TI3/AB4AW Rich email

PySDRVNA: VNA Software for RXTX Ensemble Users

I enjoy experimenting with antennas and using WSPR to evaluate antennas has been an invaluable tool. I also use the SoftRock RXTX Ensemble under Linux and recently wrote some software that allows you to use the RXTX Ensemble as a VNA for reflection measurements. This has also been an invaluable tool for antenna experiments. You can find the VNA code at:

Testing the Mini Whip with WSPR

I've been impressed with the mini whip antenna used at the main websdr station: You can find out more about the mini whip at Recently I had the chance to borrow a mini whip antenna and test its performance with WSPR. The results from the 30M tests were interesting:

Attic Dipole at 6M height: 820 spots, 174 farther than 4000km

MiniWhip at 3.5M height: 736 spots, 188 farther than 4000km

This was for the same ~20 hour period. The attic dipole had the most WSPR spots, but most of those were of fairly local stations. As expected from theoretical models, the dipole has better high-angle reception when compared to a vertical. The mini whip had the most distant spots. It has slightly better low angle reception compared to the dipole, again as expected from models comparing close to the ground dipoles and verticals. When you look at the actual SNR db numbers reported by WSPR, you can see local signals are clearly stronger on the attic dipole during the day. As night comes, the two antennas produce more comparable spot strengths. The fact that the mini whip actually had more distant spots was surprising and very encouraging.

U2 takes to the air down under

Have just got my Ultimate 2 WSPR beacon running this afternoon. Currently it is lying on the table here in the shack. Power supply at the moment is 4 x 1.2v NiMH AA rechargeable cells. I am running the PA at 4.8 volts also. I fitted all the BS170 fets so the final has 3 in parallel. Measuring about 300mW into the feedline.
How's it getting out ? I have it on 80m at the moment and the first spot was from VK1KF receiving me at -20dB S/N, a short hop of 2890Km. Not using any GPS time correction yet but that will happen later this week all being well

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