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.

I have placed a self-contained utility that, in one go, will generate a text file for use with PIC assemblers. The utility will generate either conventional callsign/4 digit locator or compound callsign/6 digit locator data. Additional information is at

Gene W3PM

This project was updated to include GPS derived frequency calibration and compound callsign/6 digit locator capability. Additional information is at

Gene W3PM

2013-01-11 08:22 OH2GSY 28.126077 -22 0 KP30ll 5 VK2KRR QF34mr 14985 84

I had heard VK2KRR regularly before, but this was the 1st time VK2KRR heard me.

Hi all
This morning at 10 m band I`m received this one,
0910 -20 4.4 28.126173 -1 32B/PN7UPE 53
who knows this call and who received??

Hi All !

Since a few days my Locator Suffix is missing in the WSPR Database.
Now it is "JO50", but it should be "JO50cb".

Any idea what has happened ?

73 peter dl6nl

2013-01-13 07:28 KD8GBK 1.838034 -33 0 EN56st 5 F5OIH JN06ci 6384 55
2013-01-13 06:58 K9PAW 1.838189 -25 0 EN61ar 1 F5OIH JN06ci 6685 53
2013-01-13 07:22 K9PAW 1.838189 -23 0 EN61ar 1 F5OIH JN06ci 6685 53
2013-01-13 07:10 K9PAW 1.838189 -23 0 EN61ar 1 F5OIH JN06ci 6685 53
2013-01-13 01:06 K5DNL 1.838069 -30 0 EM15lj 50 F5OIH JN06ci 7742 47
2013-01-13 02:54 K5DNL 1.838069 -27 0 EM15lj 50 F5OIH JN06ci 7742 47

30 at 04:15UTC still good. Receiving eastern Europe on the east coast of the US

2013-01-11 12:18 DL5AKF 14.097140 0 0 JO50mx 0.05 F5OIH JN06ci 946 241
2013-01-11 11:02 DL1FX 14.097123 -11 0 JN49gr 0.1 F5OIH JN06ci 724 242
2013-01-12 00:06 F4DTL 0.475666 -16 0 JN18fp 0.2 F5OIH JN06ci 306 214
2013-01-11 23:44 F5WK 0.475716 -20 0 JN18hp 0.2 F5OIH JN06ci 313 216

2013-01-11 09:04 ZL4VV 14.097036 -18 0 RE79mc 5 F5OIH JN06ci 19280 327
2013-01-11 08:36 ZL4VV 14.097037 -16 0 RE79mc 5 F5OIH JN06ci 19280 327
2013-01-11 08:30 ZL4VV 14.097037 -14 0 RE79mc 5 F5OIH JN06ci 19280 327
2013-01-11 08:26 ZL4VV 14.097037 -18 0 RE79mc 5 F5OIH JN06ci 19280 327
2013-01-11 08:18 ZL4VV 14.097071 -14 0 RE79mc 5 F5OIH JN06ci 19280 327

Excellent, managed to master Ubuntu enough to install WSJT and WSPR this afternoon.
Now up and running again at a new QTH, hope to be very active once more now I'm not tied to windoze.
Just need a good time synch for the clock.

I decided it would be fun to process all of the spots in the spot database since the beginning (March 2008) and keep track of various "records", i.e. the top 25 spots per callsign in various categories. I had to pre-process some of the data to remove duplicates and properly sort LF/MF bands (newer monthly archive files have better filters applied, but corrections were never made to older data).

New radio, need to get it cabled up.

today Sunday 6 Jan 1255
using 3 element SteppIR at 45 ft

Sorry to say that the participants in the ARRL RTTY Roundup 2013 have camped themselves all over WSPR on 20. Thats why I like the WARC bands so much.

homebuild SDR trx based on Flex1000 software: PowerSDR 2.5.3 Liniair amplifier homebuild 100W . Antennae wire dipole 2x 20m

I just finished construction of Jay Wilson's kit with the addition of a low pass filter from Kits-and-parts.
I attached the low pass board right above the WSPR-AXE board.
Broke the PC trace going to the output BNC and inserted the low pass filter.
Tomorrow I will strip the outer insulation from some RG-58 and fold back the braid to make a 1/4 wave vertical coax dipole.
I will run it up with a fiberglass surf fishing rod and get it on the air.
And will do it on the first day of a new year.

What a great kit!

Just beginning to spend some quality time setting up WSPR to receive on my old trusty Yaesu FT840. That's what extended holiday vacations are for.

After years of WSPR-ing I decided to give two meters WSPR a try.
The radio has CI-V (CAT) commands for setting frequency but not
transmit/receive. So I went into the microphone input so I could
use VOX to key the transmitter.

The 706 stock oscillator is nowhere near stable enough.
I tried the little German crystal heater but I couldn't get
the expected results. It couldn't counter the temperature
variation from the fan going full tilt during transmit.

Santa gave me a new WSPR transmitter for Christmas, the kit arrived from England well before christmas and was assembled in a few hours, since then it has been running on the bench, as I played with its many (9) different modes of operation.

Then came the task of putting it in a box and adding the finishing touches, and finally the big moment yesterday I connected it to the antenna.

What can you expect from two intergrated circuits, one a 74HC00 logic chip the other a small AT microcontroller with two 2N7000 MOSFETs as the PA, running from a 5 Volt supply pulling 110mA on transmit, the answer is 8.4volts P/P on 50 ohms, a quick calculation 175mW, increasing the PA volts (only) to 6 Volts produced the desired 9V P/P or 200mw RF output.

A quick touch up of the frequency to 10.140170MHz, selecting WSPR Mode and setting the realtime clock to UTC and into the antenna, a Vertical Moxon Rectangle (top at 30 ft reflector at 6ft) a real NVIS cloud warmer, SWR 1.2:1 and fingers crossed, where will my 200mW go.

Two and a half minutes later the answer a +10 s/n spot from VK4TMH 507km away a good start, as the afternoon progresses the reports get better VK5ZEA @ 1.817km, WA2YUN @ 5,409km, KL1X @ 11,169km, W5Olf @ 12,805, then just before bedtime several -28 s/n spots from OH8GKP @ 14,502km.(a total over 75 spots in 5 hours)

A quick final technical check, 200mW yes, the 2n7000's do run a little warm at that, but at 60 cents each that is not a worry, the realtime clock once set has kept time to better than a second (or my windows computer without help), the frequency has slowly drifted a few Hz with a 5 degree C change in ambient temperature.
(I am not at this stage using the external GPS time frequency input option provided in the software).

So we now have a viable battery powered, stand alone 200mW WSPR Beacon transmitter that works. (time to think about a small solar panel battery charger)