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.


Les invito a visitar mi sitio

VI100ACT on 40m

I can use trhge special call VI100ACT on 40m until August 7 2013. Since that call cannot be used in WSPR I will use my own call VK1WJ and all contacts mane in WSPR count also vor VI100ACT. Paper QSLs only for VI100ACT please!

HVT vs Tatty-Tenna TX

HVT-400 mobile ant

12:48 9A/DD5CF 10.140248 -23 0 JN75gg 0.5 DJ2RD JO40cc 716


13:10 9A/DD5CF 14.097173 -25 0 JN75gg 0.5 SV8QG KM39gc 1201
13:10 9A/DD5CF 14.097157 -11 0 JN75gg 0.5 DC8SE JN48xi 489
13:10 9A/DD5CF 14.097162 -15 0 JN75gg 0.5 SP5ISZ KO02md 900
13:10 9A/DD5CF 14.097124 -19 0 JN75gg 0.5 DM3FML JO60ux 638
13:10 9A/DD5CF 14.097144 -25 0 JN75gg 0.5 DC3RJ JN59 540
13:10 9A/DD5CF 14.097153 -23 0 JN75gg 0.5 PA2WO JO21uf 930
13:10 9A/DD5CF 14.097151 -23 0 JN75gg 0.5 LA9JO JP99gb 2655
13:10 9A/DD5CF 14.097147 -17 0 JN75gg 0.5 PI4THT JO32kf 955
13:02 9A/DD5CF 14.097173 -23 0 JN75gg 0.5 SV8QG KM39gc 1201
13:02 9A/DD5CF 28.126130 -21 0 JN75gg 0.5 OV1MK JO65bb 1102
13:02 9A/DD5CF 14.097158 -17 0 JN75gg 0.5 DC8SE JN48xi 489
13:02 9A/DD5CF 14.097173 -23 -1 JN75gg 0.5 G4CUI IO93fi 1467

HVT vs Tatty-Tenna Rx

HVT-400 Multiband mobile ant.

12:58 SV8ARJ/1 14.097085 -13 1 KM17uw 5 9A/DD5CF JN75gg 1115
12:58 DM3FML 14.097137 +5 0 JO60ux 5 9A/DD5CF JN75gg 638
12:54 G4CUI 14.097044 -14 0 IO93fi 1 9A/DD5CF JN75gg 1467
12:54 G8VDQ 14.097067 -16 0 IO91um 5 9A/DD5CF JN75gg 1293
12:54 DM3FML 14.097137 +2 -1 JO60ux 5 9A/DD5CF JN75gg 638
12:52 HB9BDJ/P 14.097192 0 0 JN36li 5 9A/DD5CF JN75gg 600
12:50 G4CUI 14.097044 -15 0 IO93fi 1 9A/DD5CF JN75gg 1467
12:50 G8TDL 14.097115 -32 0 IO91ok 0.5 9A/DD5CF JN75gg 320
12:46 G4CUI 14.097043 -9 0 IO93fi 1 9A/DD5CF JN75gg 1467
12:46 ON7KO 14.097110 -16 -1 JO21ce 1 9A/DD5CF JN75gg 1008
12:46 SP5ISZ 14.097118 -17 0 KO02md 10 9A/DD5CF JN75gg 900
12:46 OZ7IT 14.097186 -15 0 JO65df 5 9A/DD5CF JN75gg 1119

13:08 G4CUI 14.097046 -11 0 IO93fi 1 9A/DD5CF JN75gg 1467
13:08 ON7KO 14.097112 -8 0 JO21ce 1 9A/DD5CF JN75gg 1008
13:08 SP5ISZ 14.097122 -1 0 KO02md 10 9A/DD5CF JN75gg 900
13:06 G4CUI 14.097047 -13 0 IO93fi 1 9A/DD5CF JN75gg 1467
13:06 SV8ARJ/1 14.097086 -4 1 KM17uw 5 9A/DD5CF JN75gg 1115
13:06 DM3FML 14.097139 +6 0 JO60ux 5 9A/DD5CF JN75gg 638
13:06 OZ7IT 14.097188 -22 0 JO65df 5 9A/DD5CF JN75gg 1119
13:04 G8VDQ 14.097069 -6 -1 IO91um 5 9A/DD5CF JN75gg 1293
13:04 HB9BDJ/P 14.097194 -17 1 JN36li 5 9A/DD5CF JN75gg 600
13:00 G4CUI 14.097046 -6 0 IO93fi 1 9A/DD5CF JN75gg 1467
13:00 G8TDL 14.097116 -26 0 IO91ok 0.5 9A/DD5CF JN75gg 1320

What are other WSPR users doing about powerline noise

I have terrible constant powerline noise from a pole about about 1000 ft from my small city QTH (40M through 15M). Aside from getting the power company to fix it (that could take a while), what are WSPR users doing to mitigate powerline noise from reaching their receivers, especially for the small kits and QRP setups. I know that SDR approach can help for mild cases, but what about more extreme cases?

My setup is a TS-690s with a 2.8KHz (8.33MHZ IF) filter and a 250Hz (455KHz IF) (for WSPR). The Kenwood noise blanker is very effective at reducing the powerline noise and I can spot some stations with the noise blanker on but I don't think I am getting the best SNR possible. I would like to block some of the pulses from reaching the receiver, possibly with a line-synchronous noise blanker? I tried the MFJ-1026 but it is not a viable option as I cannot put up another decent antenna for noise pickup and it seems to distort WSPR signals worse than the internal NB

What effect is the internal noise blanker or a line-synchronous noise blanker having on the WSPR signals and SNR?

What can be recommended for stand alone Transmit/Receive kits/sdr/etc that can deal with powerline noise. My preference is for analogue approaches, multiple band operation, but simplicity of setup is key.

My antenna is a homemade multi-band vertical dipole for 40M - 6M, axially fed. it should also have a fairly low angle of radiation for 17M and above average dipole gain for 30M and 20M. the bottom is 5ft off the ground and the length is 39 ft.

If anyone is interested in setting up a sked for comparing antennas at the same time, especially verticals I would be interested in comparing spots, determining antenna efficiency etc. I know comparing antennas with WSPR is trivial, but it can be useful.

One hour of Australia 160m

2013-07-27 18:54 RX3DHR 1 838173 -25 0 K094ks 5 VK7DIK QE28sf 14664 106
2013-07-27 18:44 RX3DHR 1 838167 -12 0 K094ks 5 UT7GH KN66hp 1004 203
2013-07-27 18:32 RX3DHR 1 838171 -24 0 K094ks 5 VK2DDI GF55hf 14444 96
2013-07-27 18:32 RX3DHR 1 838173 -27 0 K094ks 5 VK7DIK GE28sf 14664 106
2013-07-27 18:18 RX3DHR 1 838171 -20 0 K094ks 5 VK2DDI GF55hf 14444 96
2013-07-27 18:18 RX3DHR 1 838167 -14 0 K094ks 5 UT7GH KN66hp 1004 208
2013-07-27 18:06 RX3DHR 1 838170 -17 0 K094ks 5 VK2DDI GF55hf 14444 96
2013-07-27 18:06 RX3DHR 1 838167 -16 0 K094ks 5 UT7GH KN66hp 1004 203
2013-07-27 17:52 RX3DHR 1 838167 -22 0 K094ks 5 UT7GH KN66hp 1004 203
2013-07-27 17:52 RX3DHR 1 838170 -18 0 K094ks 5 VK2DDI QF55hf 14444 96

WSPR beacon on 40m tonight July 23rd

Antenna fixed and beacon working as being spotted by DU1MGA 2 hours before sunset...
Unfortunately my low-band antenna seems to have been damaged by the strong wind today...

After the good results on 80m a few weeks ago and the deceiving condx on 20m, tonight I setup my beacon on 40m.
Antenna is OCF dipole 10m above ground and power around 1W.
I hope no power cut will reset the beacon this time.

By the way, W8DIZ (Kits and Parts) 5W class C amp is very tough. Following the beacon reset, it transmitted a 14MHz signal to a 7MHz antenna for a night long.
It was damn hot, the glue fixing the toroids had melted, but still putting good power on all bands...

Yan - XV4Y.


My Raspberry Pi WSPR Transmitter

Hi all,
I'm testing Raspberry Pi WSPR Transmitter now as follows;
My additional task is improving the FET Linear Amplifier.

ja9mat Hidehiko.

G0PKT: Martello Tower Group QRV on 30m WSPR

Over two years ago, we installed a 30m QRSS transmitter in our shack and it’s been running almost continually since then. The site is very close to the sea and the aerial is a resonant monoband dipole oriented roughly north-south and at about 40ft AGL.

As of the 8th July 2013, G0PKT is running the new 2.02k firmware in a Hans Summers “Ultimate 2” transmitter and so as well as sending QRSS, we’re now running a WSPR cycle every ten minutes.

Our site is very well sited, the Martello Tower is close to the sea and 30m really does work well from there. Many QRSS grabbers have reported big signals from our 150mW signal and that’s all down to the resonant aerial and the location.

We hope that WSPR users will benefit from our beacon.

Martello Tower Group, G0PKT

WSPR Beacon with external frequency reference.

Testing WSPR Beacon with external 10 MHz GPS DO based on W3PM Arduino Mega 2560 & DDS60 WSPR/QRSS Signal Source v3.2, 50 mw into 203 foot Random Wire Antenna, 5' high.

73, Javier

A Simple Mobile/Portable WSPR Beacon Controller

This project provides a simple means of generating an audio WSPR signal using either an Arduino Nano or Arduino Uno to drive a SSB transmitter for mobile or portable WSPR beaconing. Automatic compound callsign and GPS derived 6 digit locator encoding are included.

Additional information is at:

73, Gene


le bonjour en ce samedi 29 juin 2013

Radcom, G4JNT and Wspr above HF

Am I the only person who found the article in June 2013 Radcom by Andy Talbot strange. If I didn't know better it might have come over that some people have an agenda against free experimentation.

The article made certain assumptions about the (implied) misunderstanding (we are wearing the wrong trousers apparently) of operators on bands above HF. What if the operators already knew and understood the issues raised, but wished to experiment regardless?

When I obtained my license it was with the understanding that we would use it for experimental purposes.

We are experimenting!

Tried WSPR for the first time.

Yest I had tried on 21.09460 @ 15.23 UTC with 5W power. I had copied two stations DO1WWW.
But I couldnt see the spot in map when I checked online.

First test tonight with the 150mw Ultimate2 QRSS kit

Received the Ultimate2 QRSS kit from Hans on Monday.
Pieced it together and hooked it up to the 30m dipole which is mounted under my roof @ 8m height.
Need to learn the software capabilities a bit, the GPS which I hooked-up is not communicating with the board.
Need to look into that.
At least some OM are picking up the 150mW WSPR signal.
Will shut it down after an hour or so, must first lookinto spectral purity & stability.

Getting the softrocks on the right frequency

The Softrocks, and many other Si570 based designs are a bit temperature dependent.
I am trying to tx on 10140277 Hz with my portable rig. To check the frequency I will just read the frequency reported back to me..
As you all know the result is not very clear. One stn will tell I am on 289 Hz and another is telling me I am on 258 Hz.
I am all alone in the woods with my little softrock and on frequency unknown!

What I have done to resolve this may be of help to some of my dear wspring friends as well, so that is why this is written.

Keep in mind that this is intended as an quick and easy fix out in the field (or a remote cottage) and not as a Softrock Calibration Procedure.

I have made the Other Band selection to listen for the Russian freq std stn at 9.996 MHz.
Just put the Dial freq to 9.994500. Then on Setup Advanced adjust the A-value.

When the weather changes be prepared to adjust.

Here is my screenshot:

NB! always remember to turn off Upload spots and to turn tx fraction to 0.

Jon Ove

KC4RSN glad to be back home...

Thanks to all for the spots while I was operating portable in New Braunfels, Tx., very happy to be back home now. See you on the waterfalls...

XV4Y WSPR Beacon on 80m with 1W


I have turned on my WSPR beacon on 80m with a little more than 1W into an OCF Dipole not very high above ground.
I know that's not the best time for low-band DX but I just had enough spare time to finish the PA which was sitting in a box for many months...
Hope to have reports despite condx.

Yan - XV4Y.


Wow CN8LI @ 1320 +10dB. Even better at 1336 and 1348 +12db.

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