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.

Back again with 50mW. Antenna (long wire) orientation has been changed slightly. Will see if this makes any difference!

Also - I just spotted K1JT...

in direction of IZ4PSG..

on 144.49047Mhz
Cycle 20% with 4x8 I0JXX.

I'm listenning full north. I have some problem of TX under Ubuntu with WSPR 3.0 (from svn)

I am currently running horizontal polarisation, on 144.49500mhz, if any stations wish me to operate on a vertical yagi please ask, I am only to willing to change polarity.

I've written some code in Vis C++ to display waterfall of wspr sigs etc., and have also input a gps pps pulse on the other channel of the sound card. I know wspr sigs are not timed to us accuracy, but the same code can be used to estimate propagation delay of ibp beacons which are accurately timed. Anyway my query regards the timing experiments done by some wspr people using wwv etc. The problem with doing it my way is that the propagation delay through the receiver is not accounted for, and I know an alternative method involves coupling the pps output to the receiver input directly.

Sure all the VHF boys will have noticed some strange data base entries today, with one station showing up as hearing a G0BZB, DL8DC and an OH3MHA, I think someone had there settings wrong as these are supposed to be for the 7mhz band, easy to confuse if you dont set everything up correctly hi
Angus M0IKB

Will be RX and TX on 10m and RX on 6m all weekend. Hopefully some 50MHz for the first time...

1 Watt to 9el Tonna

KP4MD WSPR station has been off the air since mid March 2011 due to hardware problems (recalled overheating HP computer due to a defective Nvidia GPU chip). http://www.nvidiasettlement.com/

I'm in the process of relocating to another house and have no proper antenna. I stuck a mobile whip for forty metres on a 16 foot pole and pushed it up inside the foliage of a large cherry tree in the garden. Unsurprisingly, not many contacts on forty in comparison to the horizontal dipole at the other house.... Until I found WSPR, that is.

If your running a flex grab the latest full release of 2.0.22, in 12 months its come a long way ! The 1500 is tops for stuff like WSPR and super compact for the briefcase. Camping or Hotel room working it goes with you and runs no fuss and no crashes ! It makes very good use of the new high performance small notebook processors. Its now my favorite radio.

With the arrival of Tronson RF attenuator (model RA1728A)
I was finally ready for more low power experimenting.
Easter Friday afternoon was ideal time to tune into 40m WSPR.
An email notification about experiment was sent to LF reflector
and couple of locals quickly joined in.

The very frist transmission was done with barefoow Genesis G59 transceiver running 10 mW:

10 milliWatts

2011-04-22 02:32 VK2DX 7.040060 -18 0 QF56oe 0.01 VK3DB QF31dt 657 221
2011-04-22 02:30 VK2DX 7.040062 -6 0 QF56oe 0.01 VK1DSH QF44ms 253 231

The G59 10 milliwats signal was an easy decode over the distance of 657Km
so power was immediately reduced to 1 milliwat (10dB attn)
Signal at this power level was barely detectable at VK3DB, but good enough for decode at -29 s/n.

1 milliWatt
Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
2011-04-22 03:12 VK2DX 7.040060 -15 0 QF56oe 0.001 VK1DSH QF44ms 253 231
2011-04-22 03:10 VK2DX 7.040059 -29 0 QF56oe 0.001 VK3DB QF31dt 657 221

With additional 10dB attenuation and 100 microwatts output,
the signal was still an easy copy over the distance of 253 Km by VK1DSH.
Actually, Dale decoded almost every transmitting sequence!

100 microWats

Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
2011-04-22 03:50 VK2DX 7.040060 -20 0 QF56oe 0.0001 VK1DSH QF44ms 253 231
2011-04-22 03:48 VK2DX 7.040060 -19 0 QF56oe 0.0001 VK1DSH QF44ms 253 231
2011-04-22 03:44 VK2DX 7.040060 -24 0 QF56oe 0.0001 VK1DSH QF44ms 253 231
2011-04-22 03:42 VK2DX 7.040060 -23 0 QF56oe 0.0001 VK1DSH QF44ms 253 231
2011-04-22 03:40 VK2DX 7.040061 -21 0 QF56oe 0.0001 VK1DSH QF44ms 253 231
2011-04-22 03:38 VK2DX 7.040061 -23 0 QF56oe 0.0001 VK1DSH QF44ms 253 231

Just put a 7.5m vertical on the back fence. Couple of counterpoise wires along the fence. Self-resonant about 8.6MHz but tunes well on 40-6m. Will shorten it tomorrow to be self-resonant on 30m, but in the meantime, the LDG Z-11 ATU seems to be doing the job. Eventually a remote switched loading coil to accomodate 80-6m is in the plan.

Much more lively than the experimental 30M (horizontal) flat-top (in the walnut tree to the east and the plum tree to the west) fed with 10.7m 300 ohm ribbon that I have been using for the last year on 30-10m.

For the last two days I have been monitoring WSPR signals on 7, 10 and 14 MHz and uploading spots. It is amazingly good though my reasonably quiet receiving location is a help. Surprises have been the relatively close VK2 stations heard at less than 200km, and the much more distant EU and NA signals heard on all three bands at various times of the day. Also some of them have been quite low powered, as low as 23 dbm or 0.2W. As a nice additional touch today, one of the stations heard was K1JT.

What a great piece of software! Thanks, Joe!

A smashing success with this little baby, within 15 minutes of installing the power connector it's up online and on air. With the VAC & CAT for this work this Flex1500 has real sex appeal. Mmmmm nice ! No old suit case style radios and sound card interface units, all software, all sleek and modern.

Today I stop my WebTRX and let run WSPR. I use WSPR before only from home for little tests but it is so interesting, that I will run it now longer. I let it run for first tests simultaneously on 15 and 20 Meter on a 2 Element Quad. I beam now 310 degree. If I find a program that can turn rotors which used HyGain DCU1 or Yaesu GS232 protocol by time, I turn it in the morning time to east. Any ideas?
On 10 I try to run WSPR from home, but not 24h a Day.

I'm getting some very strange decodes, so I'm not quite sure what's going on.

I'll let it run for a while, tx on 144.489,469 MHz.

Latest beacon design has 16 stored frequencies covering all bands 1.8 to 50MHz selected randomly. AD9852 DDS generates WSPR directly http://www.g4jnt.com/JTModesBcns.htm Feeds to broadband 6W PA driving untuned 7m high vertical antenna

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