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.

My WSPR image grabber is currently active at the following URL:
I am using Spectrum Lab and the images are gathered over an 8 minute period then uploaded to the site refreshing the old image, therefore you will see what I am seeing for that time period. The frequency is displayed on the right hand side of the image with the time intervals displayed along the bottom.
Please pass along any comments.


Only 300m from prior QTH.
Basic dipole cut for 40m up at about 20 ft AGL. Seems to load up on all HF bands. Dunno about efficiency, but can at least match it with the auto ATU. Sadly, it's in the trees. (contacting branches at both ends), so again, efficiency will suffer. Will eventually get up either my multiband trapped dipole, or a whole bunch of single band wire antennas. Plenty of trees and about an acre of land to play with.

The original owner obviously planted trees without regard to appropriate spacing for HF antenna installations. Never mind; at least I'm up and running.

Hi All,
I tried to join with 15m Special activities held on Nov.5 2008.
Thanks all participants.

The result is as follows:
Reported (8): ZL2TLD, 7L4IOU, JK1KTY, F6IRF, HB9TJM, SP3LYZ, T61AA, JA1MRE.

Heard(6) : ZL1RS, 7L4IOU, JA1MRE, F6IRF, T61AA, HB9TJM

Somebody asked abt my antenna.
It is made of twin-wire type material used here by telephone companies.

It uses linear stub to decouple rest of wire for 30m operation.
The same stub is acting as loading element for 80m so decreasing the overall length of antenna.

The following may give ideas to the WSPR'ers interested by 80m.

I built a RX loop - quick dirty job with plumber / electrical PVC - let say 2 hours work.
- The main loop is a single turn, made from 5mm diameter coax (only the shield is used). It is "diamond shape" 1m by side. It is tuned by a 358pF silver mica capacitor + a 5-60pF ceramic trimmer.
- The coupling loop is also "diamond shape" ; 25 cm by side inside the main loop.
- The SWR at resonnance, measured with the MFJ249B is 1.1

The WSPR 80m distance record which was held by W1CDO and ZL1ANY with 14529 kms on March5 fell 3 times today...

- The first one today was N2JR with VK7KRD with 16311 kms at 0612z
- Then followed by myself at 1612, also with Bob VK7KRD at 1612 with 16929 kms
- Finally G3SUY is the current record holder (once again with Bob) with 17326 kms at 19:10...

A special mention for Rich N2JR, who has the only 2xways and with 1 W !!!
Now we are looking for 80m long path !!!

73's Pat

See attached recorded on F5RRS 17m signal... (F5RRS is 35kms away, but behind the mountains)
Anybody has an idea on what could cause such a doppler? plane, meteor trail, or something else (ESS, UFO ? ;-)
Anybody is able to calculate the speed of the object ?

PS Sorry, have exceeded my 1Mb limit. The file is here

Great activity thanks to all participants;
However this was a bad day for me, at least on RX side, due to non-stop heavy rainfalls. For those who may be interested to compair actual reports to predictions, attached is a noise map, done on 20m with rain. I have 2 clear noise sources which correspond to the power lines towers at 270 and 130 degrees. Of course the noise level is a bit lower on 17m (about 3dB according to the CCIR model).
With rain, my quieter direction is 30 degrees, and the SNR degradation is some

See the attached showing W1CDO signal as received here in EU.
The path from NM to SE France, passes near the "aurora oval" and the effects of the frequency spreading (aurora effect) are clearly visible, although it is not strong enough to affect decoding, as it was the case on K7EK 40m signal.
This explains why it is so hard for EU -stations to get WSPR spots from US west-coast stations.
By the way this screen shot was taken today with quiet geomagnetic conditions (k=1 A=1). I guess that W1CDO signal will become unreadable, with perturbed conditions.

Once upon a time (long ago) I registered with my callsign HA6NN and was promised to get a password in email but I have never got it!

Then I asked for lost password several times...

Would you be so kind to erase my first registration or send me a password for it as were promised.

I check my mailbox regularly so no letter goes into waste...

gl de ha6nn

We have been managing to sustain a good amount of activity on 17m the last few days. I would like to propose establishing a permanent "settlement" of stations on that band.

You may have noticed that I'm finally starting to devote a little time to fixing and enhancing some things on the web site. I overhauled the map page to use google maps and a day/night overlay, which adds insight as we look at propagation paths.

I also added a simple page called "Activity", accessible from the primary link menu across the top, which summarizes how many stations are active on each band in the last hour. That's just a shortcut to finding out where current activity is clustered.

... and probably what gets people hooked on QRPp ?

For the first time since I discovered this mode of operation I found myself at home in the morning with a mind to switch on the radio and play. A Saturday morning with the whole weekend stretching away into the distance, and all this after a particularly hectic week at work.

Unlike last Thursday when I forgot about the "20m Activity Day" until it was really too late, I remembered good old WSPR and fired the system up on 30m and left it going.

On behalf of a group of several dedicated WSPRers (F6IRF, G4ILO, and G0KTN), I would like to propose that we make Wednesdays "Special Activity Days" to do some experimentation with coordinated WSPR activity beyond the usual operation on 30m.

We would like to start this process by having this Wednesday, 22 October (0Z-24Z), be a 20m activity day. We will rotate to different bands each week, and we may come up with some other activities/experiments as well. We think we'll learn a lot about propagation and about our own stations by having a larger critical mass on alternate bands.

In response to popular request I have made my compiled binary version of WSPR for Linux available. The program has been compiled on Xandros Linux similar to that used by Asus on the Eee PC. The user interface has been optimized so that it fits the 800 x 480 display of the original Eee PC, which I own. Some of the fonts have also been changed so that they are easier to read.