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.

W1AW/4 QRV WSPR 09-15 April 2014

2014 marks the centennial of the American Radio Relay League (ARRL). As part of the year long celebration, K4RCG has been authorized to operate with the ARRL HQ callsign as W1AW/4 on WSPR, JT65, JT9, and PSK-31 during "Virginia QSO Party Week". Look for me on all of the usual HF WSPR/JT/PSK freqs. JT65/JT9 and PSK-31 QSOs will be uploaded to LOTW; I will also forward all W1AW/4 WSPR spots to the ARRL but they are not uploadable to LOTW at this time. More info is available at


Micro Beacon on 5,250 Mhz

I am testing a 60m beacon with audio generated from a micro processor. Any information on the quality of my signal and speed of the CW at the end will be appreciated. 73 de Paul ZS6EHG

JA1KWV on 2m

JA1KWV in Tokyo may be on the air tonight(3/14 around 2000 to 2100JST).
Please spot him.


How about we try 40 MHZ?

WSPR right
So how about 40.670 MHZ band
Allowed 1 watt eirp with no licence, needed so it should be easy.
Q is?
What frequency should we use?


Where are JAs on 6M WSPR?

Only 2 JAs logged.


5 watts to 50 watts

France on MF band 472 - 479 kHz : OK from today...

By decision 2013-1515, issued to day 2014 march 12th in the French "Journal Officiel", all amators in France may now transmit on the MF band 472 - 479 kHz.

73 de Andy F6CNI.

160m activity- VE1RBR arrival

The activity on 160m is always consistent from one week in particular on the period from 05:00z to sunrise. I spotted this night a new entry (W8CT). The 34th NA stations in my list.
As noted by Jim (WB5WPA) new stations come on 160m. In this respect, I welcome Jim (VE1RBR) for its recent arrival on 160m. In a few weeks he has already spotted all major European stations and even Leigh (VK2KRR). Good job, really FB station!!!
73 - Patrick

Balcony MFJ loop 935 500mW-1W 17/20m

2014-03-09 05:48 RV3APM 14.097141 -23 0 KO85ru +30 0.501 WA8PGE EM89ov 7973 4954
2014-03-09 05:48 RV3APM 14.097109 -26 -1 KO85ru +30 0.501 GM4SFW IO77sn 2524 1568
2014-03-09 05:48 RV3APM 14.097132 -20 0 KO85ru +30 0.501 OE6PWD JN77rb 1799 1118

And 5W on 17m

2014-03-09 18:34 RV3APM 18.106135 -26 0 KO85ru +37 5.012 DL8YCA JO31or 2022 1256
2014-03-09 18:30 RV3APM 18.106140 -2 0 KO85ru +37 5.012 PI4THT JO32kf 2020 1255
2014-03-09 18:30 RV3APM 18.106132 -24 0 KO85ru +37 5.012 W8AC EN91jm 7750 4816

2m WSPR result

Last night session on 2m WSPR was as follows.

2014-03-08 11:56 JH1GYE 144.490582 -19 0 PM96mi 10 JR4ENY PM95sn 99 153
2014-03-08 11:54 JR4ENY 144.490450 -10 -2 PM95sn 10 JH1GYE PM96mi 99 333
2014-03-08 11:46 JH1GYE 144.490572 -20 1 PM96mi 10 JR4ENY PM95sn 99 153
2014-03-08 11:44 JR4ENY 144.490459 -9 1 PM95sn 10 JH1GYE PM96mi 99 333
2014-03-08 11:36 JH1GYE 144.490573 -20 1 PM96mi 10 JR4ENY PM95sn 99 153
2014-03-08 11:30 JH1GYE 144.490578 -19 1 PM96mi 10 JR4ENY PM95sn 99 153
2014-03-08 11:24 JR4ENY 144.490464 -10 0 PM95sn 10 JH1GYE PM96mi 99 333
2014-03-08 11:14 JH1GYE 144.490565 -18 3 PM96mi 10 JR4ENY PM95sn 99 153
2014-03-08 11:12 JR4ENY 144.490463 -7 -2 PM95sn 10 JH1GYE PM96mi 99 333

Please look at the file attached.
Adjacent lines are airplane reflection?
No VK station except VK4TVL and VK6DVR on 6m.


2m WSPR to VK

Conditions on 6m are very good these days.
So, I’m going to test 2m WSPR directing VK tomorrow. (March 8th around 3:00 to 6:00z) And possibly next day. (March 9th)
Please watch and try to spot me. At the same time, I will be running 6m WSPR too.
Antenna direction is south. Power and frequency are +40dBm and 144.490530MHz respectively. Japanese stations are also welcome.


Is that TX on frequency ?

Since i have chosen the SI570 for local oscillator in mcHF i was wondering how good my implementation of the comm routines really is. After spending long time of tracking a bug with setting some specific frequencies I have found that the chip has internal mechanism that cause it to revert to factory startup frequency if error occurs in the frequency setup routine.

Off course this is very troublesome for a device that can actually transmit - we need to know that our transmission is on the frequency we see on the LCD and we are not breaking the conditions of our license. Also if this happens on one specific error condition, then it is highly likely that other error conditions can cause the same reset routine.

My solution - verify the frequency after every change - small or large. Yes it takes bit more time, but it never hurts to be on the safe side. The actual verify process is as simple as read back the registers 7 to 12 and compare their contents with the values i have just sent via the write command.

None of the SI570 implementations i have found on the net implement this verify, and probably there is a simple explanation why - the SI570 datasheet does not mention this reset mechanism.

73, Chris

Greyline observation on 160m- KC2STA night session

That night a highway was opened between Dan and Europe on 160m. A continuous signal throughout a night is rare.
Between 00:12z and 06:42z, I spotted KC2STA 47 times without missing period.
This is an opportunity to draw a graph to highlight the gray line near my sunrise (06:27z).

An hour before SR SNR was -22,
30mns before SR SNR is -11 or +11 db of gain!!
At SR SNR is still -14 to collapse then in few minutes (06:42z).

Dan was spotted by six other European stations: OZ7IT, SM6WZI, PA0O, CT1JTQ, G8JNJ/A, G3ZJG.

Many thanks Dan for these interesting data.
73, Patrick

There is no magic, Sorry!

I'm running a Dell 600 laptop into the FT-817 and the antenna is a low mounted temporary 40m dipole.
I left the power out level of my FT-817 at full during the activity session from about 0600z to about 0920z today. So the given power of 0.05 is rather inaccurate, and certainly not magic!
Still it is nice with spots in NA and two from VK land.
I set the output level down at about 0920, and will connect up the U3 again later today, on 30m.
Peter, LBOK / LA7ZMA

2m WSPR test

I'll test 2m WSPR today.(March 2nd around 3:00 to 6:00z)
Please watch and give me reports.
Antenna direction is south.Power is +40dBm and frequency is 144.490530MHz.


Will test 2m WSPR

I'll test 2m WSPR tomorrow.(March 1st around 3:00 to 6:00z)
Please watch and give me reports.
Antenna direction is south.Power is +40dBm and frequency is 144.490530MHz.


Sorry, canceled due to the rain.
I can't mount fixed preamplifier to the tower.


Ultimate3 QRSS kit up and running.

Hello all,

The last 2 weeks I was working on my Ultimate3 QRSS kit and have to say : I love it.
It's up and running on 10, 20 and 40m and the relay board is doing a fine job.
The thrill of building it, getting the GPS working and you're first DX report . . . price less.

On my homepage I devoted a entire page to the building of my Ultimate 3 with info and photo's.

Check out :

Any comments are welcome and hope to catch you down the log.

10 Meters - 250mW

Moved over to 10 meters this afternoon. Feeding the 40 delta loop. Hopefully, I will not get arrested.

Ultimately running 3v02 in JP20

The U3 did not react well to 12V operation, silly me! Now I have repalced the PIC and the DDS and it works again and I run the unit through a 9-36V down to 5V isolated converter. No earthloop difficulties!
Will continue making improvements.

30 Meters - 65 mW...or so.

Moving down the power to around 65mW. Well, truth be told - < 70mW, but more than 50mW.

WSPR 80m 10mW tonight

Trying some WSPR with 10mW tonight on 80m. TRX=FT817 Ant=80m square horizontal loop 7m agl.
My blog:

73, Bas

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