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.

Increasing numbers of my spot reports do not upload with "attempted access to WSPRnet timed out" messages.
Is the server capacity overloaded? Should we manually upload our stored spot reports to the server to transfer the missed ones?

I have just noticed a typo error in my locator should read IO91UO not IO91OU. I have updated details today.


I had some extra time off over the holidays, and although the WX has been cool (-20 oC -ish) the thought that it would be nice to have something for 80m wouldn't leave my mind. On the other hand, midwinter isn't the time to be doing anything large or elaborate outside. I noticed an article in an old copy of TCA describing a dipole reduced in size by folding it into a square. Not a loop; the tips do not connect. For 80m, it's only 10m on a side, and I have a couple of 15m spruce trees in the side yard - directly beside the power line :(.

Just installed the frequency-hopping version of WSPR last night, and left it running on recieve-only. First indications are good, and I'm picking up signals from 80m (hello G4SPE!) to 15m (hello UA3ARC!).

I'm running an inverted L for an antenna at the moment along with an LDG Z100Plus ATU, so until I build some way of triggering the ATU from the machine running WSPR, I'll be sticking to transmitting on a single band for now.

Branford CT FN31ng is QRV on WSPR, 80-10M using Ten-Tec Orion at ~ 10W and a motley collection of dipoles and a 3-element SteppIR (20-10M).

The computer is an Intel Atom 230 CPU (1.6 GHz) with 1 GB RAM and Ubuntu 11.04 64 bit OS.

It seems that Amateurs are allowed to broadcast, as long as they have nothing to say! This is the mode for the tongue-tied ham.

73 Martin

Yesterday i built a new Antenna for 30-Meters. A little Spraycan with 28 Turns on a 50 mmm tube. Please see my blog for details.

73 de Oliver, DL6KBG

as from 17.00hrs today m3uls will become 2E0UAE. Thanks

Have changed my set-up---the FT817 now permanently on WSPR, the TS570 back to flogging cw when my pacemaker allows it!

Hi everybody

Although I am primarily a HF HAM, I would like to use this nice tool on VHF or even higher frequencies. How many stations are active on 2m / how is the experience with WSPR on that band?

73 Herbert

Using the Ensamble II SDR Receiver to receive WSPR from 80m to 10m
The soundcard is a 24 bit 96 kHz soundblaster Live.

Antennas are dipole for 80m,15m,10m and R7 vertical with elevated radial system. 6 radials 10m long 2m above ground.

Software used is either the WinradHD or Rocky.


I'm currently in the Canadian arctic, (Rankin Inlet). When I'm home next week I'll be trying WSPR for the first time.

I built a simple antenna splitter in order to receive simultaneously on 40m using a crystal-controlled Softrock and on other bands using a frequency-agile Softrock. It worked very well spotting wise, but I could not figure out how to do this with two identical USB sounds cards connected to the same computer (only one of the two worked; probably a driver limitation). I ended up using two computers. A few more details on my blog.

Hi All !

I am still testing and try to find the best setup.

i installed a new soundcard, e-mu 0404 usb. now i can hear a lot more stations :-)

my little mag-loop i installed horizontally and try to see, what that will improve.

73 de Oliver, JO61ub

Softrock RXTX 0,5 Watts

Not much up in the air at the moment.

Using an 80m Dipole at 5m AGL for everything 160-10 along with a manual ATU at the rig end of the co-ax.

Rig is IC7000

You may recall, I partially implemented data scrubbing on incoming data in April of this year. It looks for bogus calls, duplicates (including mixing product harmonics...receiving the same signal at multiple freqencies in the passband), etc. Because of some controversy, I never did roll out the "wrong band" detection code, because of some concerns it might be overly aggressive. Anyway, the implementation deleted the bad spots by moving them into a separate table. I have about 250k of them.

Thanks to all of pointers by K1JT, W1KBX, G4KLA and others
I finally got it working under OS X.

But I figured there had to be an easier way so I created a script to download a good gfortran, all prerequisite packages, compile and install WSPR in a single process.

1 - get and install xcode from

2 - download my somewhat hackish install script from

This site has now operated more-or-less unchanged for 2.5 years, and in the process it has managed to collect a huge amount of useful propagation data. I remember it being a big deal when we hit 1 million spots, then 5 million, .... By the time we hit the 3rd anniversary of the introduction of WSPR, we will have well over 50M spots, and that's at least an order of magnitude more than I ever imagined.

I'm now working through some design ideas for a next-generation implementation of the site. Part of this will almost certainly involve separating the spot database implementation from the community/social aspects of the site. They can certainly be mashed up to provide an integrated experience, but I'm pretty sure the right thing is to divorce the underlying technologies and server environment. Personally, what I want to spend my time developing is the new data store and query interfaces, and I will post more info for feedback as I refine ideas and tinker with more scalable technologies. An important part of this is getting the right APIs in place to feed other analysis, curate data, provide monitoring/notifications, etc.

I would be very interested to hear from others who are particularly interested in moving the community aspects of wsprnet forward. I initially did this site in drupal because I had some experience with it and it was easy to deploy, but it's a bit clumsy for some of what we do (e.g., there are far better discussion forums out there!). The "chat" page could be rebuilt on twitter. You all probably lots of other ideas about what sorts of tools we could have to interact better.

Anyway, please let me know if you want to be a part of design/implementation/management of the next generation of WSPRnet.

Hi All and especially Alex !

I just finished my Softrock RXTX Ensemble Transceiver and did some local tests. I tried to receive myself, which works quit good. I was really impressed as i saw the Call of Alex UA3ARC from KO85 (-26 dB) on my RX Screen while listening to 40 Meters with only the elecraft DL1 Dummy Load (which i built myself from the schematics) connected. This is real fun.

73 de Oliver DL6KBG, JO61UB


Transatlantic contact on 2m with WSPR, possible or not ?

After some testing in WSPR on the HF bands with very low power levels, I wish to share with Ham located on the East Coast from Noth America, particularly from NF Canada (VO1)
During 2011, I will relocate the station to a secondary QTH, who will be located a few meters from the sea, on the western tip of Brittany. The idea is to implant a HF contest station for SOAB.
But why not take advantage of this excellent take of to let it run 2m WSPR beaming North America!