I let the WSPR run a couple of hours on 20mtrs today, just to test the reported QRG's. I checked my TX QRG accuracy & stability before and after the data collection to be within 2 Hz.
I expected to get a symmetrical Gauss distribution but that was not the case. Please look at the frequency deviation of total 41 stations with 270 spots. The mean freq deviation spot of each station is plotted. Only 16 out of 41 stations had a max deviation of + and - 4 Hz.

Time to check the TX folks or use the freq correction in Version 2


remark big ears SM0FLY DL2ANV they must have low ref noise and excellent antennas.
I am using a PE1NNZ SI-570 Beacon with 10Db att at output into W3DZZ at 10m.
I did not change manually the power in the data base it is 10mW.

1 mWatt +0dbm Test
Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
2009-12-12 16:34 ON8DC 3.594067 -20 0 JO21be 0.001 G0KTN IO81ti 452 275
2009-12-12 15:58 ON8DC 3.594066 -15 0 JO21be 0.001 DL2ANV JO33tc 320 47
2009-12-12 15:58 ON8DC 3.594068 -23 0 JO21be 0.001 G0KTN IO81ti 452 275

2009-12-12 12:46 ON8DC 7.040058 -23 0 JO21be 0.001 HB9TMW JN36gq 531 160
2009-12-12 12:34 ON8DC 3.594066 -14 0 JO21be 0.001 DL2ANV JO33tc 320 47
2009-12-12 12:16 ON8DC 7.040155 -12 0 JO21be 0.001 DK3SML JN49sf 443 117
2009-12-12 12:16 ON8DC 7.040157 -22 0 JO21be 0.001 HB9TMW JN36gq 531 160
2009-12-12 12:06 ON8DC 7.040058 -24 0 JO21be 0.001 HB9TMW JN36gq 531 160
2009-12-12 11:56 ON8DC 7.040157 -22 0 JO21be 0.001 DL8BB JO41ul 389 83

wspr in africa seems to be a desert area....rarely do i see a participant sad.

Listen on 30M with Yaesu FT-950. Antenna: Magnetic-loop, inside the house.

Along with the server move last night, I have begun to make some structural changes to the spot database to address some scalability issues and pave the way to support more data mining & analytics on the site. The major change is that I am in the process of separating the spot database into two tables: a realtime "live" table which will be limited to some recent history (I plan to start with 14 days), and an archive table containing the full history. Spots will go into the live table, which will be used for the standard database query page. New spots will migrate into the archive table in batches, every 30 minutes for now.

By separating the transactional "live" data, it will be easier to add more sophisticated search features to the archive database (date ranges, wildcard matching on calls (e.g., VK*), path analysis, extraction of data for download, etc.) without locking things up for new spots and auto-refresh pages. It also makes it easier to back up the archive without locking things up for new spots.

Many thanks to Rafael Haag, PY3FF, for translating the WSPR 2.0 User's Guide into Brazilian Portuguese!

The following link has been placed on the WSJT/WSPR web site:

-- 73, Joe, K1JT

My name is Andrew. I was born in 1959. I built my first shortwave radio about 1974. I've been a ham for just about 20 years (It is time to renew, actually.) I had great fun with packet radio in the early 90s. In August of 2009, while vacationing in Good Hart MI, I was scanning the bands for anything interesting, and found a type of FSK I had not heard before. It was extremely narrow bandwidth. So narrow, that I had trouble discerning with my ear that it was any kind of data at all. It was heard on LF, about 290 kHz, too. Very strange, I thought. I recorded the signal, took it home and downloaded it to PC where I could view the waveform. Indeed, it was data.

Flash forward to November 30th, when I learned of something called WSPR. Aha! I downloaded the program, poked at the User Interface for a while, and finally read the user manual. In no time, I had decodes! How exciting.

This technology combines many areas of interest for me: Low power, beacons, and data over radio to name a few.

My current set up is RX only: Eton E1 radio and an Acer Aspire One netbook/laptop.

Thanks to Michel, F1ERG, a French translation of the WSPR 2.0 User's Guide is now available. The following link has been placed on the WSJT/WSPR web site:

Now is a good time to mention that translations into other languages will be very welcome, and I will be happy to post them on the web site as well. If you are interested and would like a copy of the original MS Word file in English, please let me know.

-- 73, Joe, K1JT

Hi all,

I think evry one have had one.
I did decode: 28 nov 2009 at 0904 -21dB 0.9DT 144.489470 -1Drift JT1/HL4LFX 53.
A unknown Ham from South Korea in Mongolia on 2 meter !!!
This is indeed a very strange one...Hi Hi Hi

Keep on wishpering with a smile
' 73
Peter , PE1DCD

Most QRPp'ers will know of my method of timing in my PC-less WSPR Keyers. (look at that I am being PC and saying PC-less).
I had query the other day regarding the XORgan 'have I considered adding GPS timing as a facility on my system'.
Well it has the facility, however my concept back in March 2008 was to abolish such things. Here were my thoughts:-
I smile at the huge power used by PC generated WSPR and a Transceiver to produce the few mW needed to span the globe. Why in a PC-less system then, add GPS timing to put the current consumption back up? Not to mention the complexity, QRPp'ers like to KISS.
Just because a Windows computer is a lousy time keeper why should we consider it impossible to keep time as accurate as the needs of WSPR. Heavens I had a fully mechanical wrist watch 40 odd years ago which kept perfectly adequate time for the purpose. Does the Quartz watch on your wrist deviate more than a second in a Month? We QRPp'ers have got to be able to do better than resorting to GPS, MSF etc.

My KISS approach:-

Hi everybody,

I just made a companion program of WSPR.

It is called wspr-map and it is available on

It reads from ALL_WSPR.TXT the infos about the received stations and plot them
on xplanet map centred on the QTH.

It also computes the distance and the bearing.

It supposes that wspr is installed in ~/WSPR as done by the .deb distributed

WSPR 2.0 was downloaded 1157 times over the past 3.5 days. The most recent full day summarized in the WSPRnet database shows 567 distinct callsigns reported.

This level of interest is great, but...

Recently, especially on the 30m band, I've noticed many cases of failures to decode caused by two or more WSPR signals QRMing one another. Lest WSPR's increasing popularity contribute to its own downfall, let me suggest that users should consider moving some of their WSPRing time to less-occupied bands. Sunspots are (finally!) starting to pick up, so we should be probing potential propagation paths on some of the higher bands. Similarly, it's always fun to see what can be done at night, or perhaps along the "gray line", on the low bands.

Let's spread out more, over our available bands!

A second, unrelated item:

Interesting data from the WSPRnet "Stats" page:

The number of WSPR spots per day has roughly doubled since a week ago. The number of reporting stations and the number of unique calls reported have both increased by 60%.

I believe that yesterday (21-Nov-2009) was the first time we've seen more than 100,000 spots in a 24-hour period.

-- Joe, K1JT

Yesterday I started to use the MEPT-beacon, the one Gernot, OE1IFM has build.
Purpose is to provide Gernot input to his wonderful beacon project.
We have long conversations to make it even better.
So far it is TX-ing on 80,40,30,20,17,15,12 and 10 meters with 1 Watt in a horizontal wire of 7 meters.
The antenna is far from ideal and has a bad VSWR.
The results of the first 24 hours: more than 550 spots, no spots on 12m, mostly Europeën stations, some stations from America and later even from Australia.

' 73 from Rotterdam
Peter, PE1DCD