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 was amused by the snapshot

It seems WSPR transmissions like to travel in pairs!

I've been consistently noticing that the number of stations who are hearing me at any given moment is usually a few stations more that the number I’m hearing, (i.e. my "voice" generally outperforms my "ears"). The ratio fluctuates but usually rests at about 4:3 (heard by/hearing). I suppose the solution is to use separate antennae for TX and RX, (i.e. a better RX antenna). Any ideas?

73. Larry, AC7SM


I'm new to WSPR.

I have downloaded it and the main screen is being displayed.
I have it running through a Signalink USB interface but with no internet connection so I monitor it thought wish website.

Firstly are the frequency's USB dial (MHz): 0.5024, 1.8366, 3.5926, 5.2872, 7.0386, 10.1387, 14.0956, 18.1046, 21.0946, 24.9246, 28.1246, 50.293, 144.488
are the ones that I put into my transciever when I want to transmit or are these the listening frequencies?

On the program itself in the Frequencies (Mhz) box it displays 2 Dial and Tx.

Hi Preston! Thanks for the reply.
I read you comments about the G3020 on the vendors page there.
Yeah I have several usb2serial converters flying arround at home. I would prefer "extract" one from its "case" and directly mount it inside the case of the G3020 then.
I am aware that it seems to be lots of work to do, perhaps thats the reason why I fancy with this kit. Except my sound converter for digimode I have nearly no homebrew staff in my shack and this is uncool.
The G3020 is maybe a good start. Since I learned electrotechnical job the soldering is hopefully not the problem. At leasts its not SMD at all.
I already saw the cooling fans in some pictures in the internet, already have a nice fan for this in backup.
Although I have a brand new Intel CoreI7 - PC with an ASUS board at home I never trust "onboard soundcards". But I must say at least for music this one on the ASUS board is ok. What does not necessarily mean that its ok also for WSPR and digimode.
Is there an external soundcard model you can recommend? External thats why because I plan to take the G3020 along with the laptop when traveling and the laptop build in soundcard is definitely crap.

I test since some days ICEPAC and WSPR for compare the SNR value on 1.8 MHz and 18 Mhz

The PIC-EL is a PIC project/demonstration board described in the February, 2010 QST. The PIC-EL in combination with the DDS-60 daughter board make a nice multiband QRPp WSPR transmitter.

A modified version of AA0ZZ’s excellent signal generator program to include WSPR operation is located at Capabilities include 160 – 6 meter operation, LCD readout, internal timing, VFO control, and a frequency calibration routine in software.

Thanks for all that did reply and giving me useful hints. For now I will try to reduce the audio level feeded to the FT857 to get less power out. Maybe next week I try to find time to build the attenuator but I see this only as a temporary solution. Instead of feeding 5 Ampere into the FT857, transform at least 4,5 Watts into heat and in the end send with 500 mW I am now considering to buy an SDR. So far the Genesis 3020 looks most comfortable to me, also because of the price.
Well, I am not the "solder-god" but I think I can make it, also there seems to be much support online.

Hi all! Everytime I read the "special activities" where power of 500 mW is mostly planned I wonder how you guys do it and which RIG's you use for this. I use an FT-857D where the lowest power set is 5 Watt. Although I know that in fact because of some loss in cable and tuner now the whole 5 Watts reach the feed of the antenna even with this 5 Watts its obviuosly no problem to get reports from Australia with my crappy multiband vertical antenna. So I'd love to do it with less power and really send a "weak" signal but how? What RIG's do you use?

don't receive decoded texts...
need help...

vy 73 de Dieter, DL6SDI

Hi all

What i do see is that many people are running there system on demand. Or more like 24/7
I guess it's allowed in other countries???

I do know it's not allowed in the netherlands.. But even there people seems to disobey the rules.
I find this strange. Maybe i have to ask where did they get there license hihi. At the super market. :)


The internal clock on my (very old) Thinkpad laptop is very unstable - it can lose
0.3 sec every 5 minutes for about 1 hour after power-on so not much use asis for WSPR use. To keep in sync with the rest of the world and allow me to use WSPR I use (and would recommend) Karen Kenworthy's program Time Sync (at This allows me to sync up with a time server automatically as often as every 5 minutes and (differing from an installed sync service) allows me to see how far

The Mahabalipuram eye-ball meet has gained popularity among Hams over the years, conducted on 2nd Saturday of February each year, this year the event will be held on 13th February, 2010 at Tamilnadu Tourism Development Corporation Beach Resort Complex on East Coast Road.

No Delegate fee is charged.

All Hams & SWLs are invited.

Contact Person : Mr. S.K.Vittal, VU2VIT

In addition to experimenting on the 1750 M and 600 M bands, I'm also active on the Broadcast Band, DXing with hi-tech crystal sets that I have built from scratch.
Building sets of any type is fun, but there's something special about a radio that gets all of its power from the antenna its hooked to. No active devices nor any
external power from batteries or the mains.

I also like to experiment with High Voltage. I've built several Tesla coils, including my 3 KVA input coil which can emit multiple 4 foot streamers! Have a look at: