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.

New to WSPR, initial observations

OK, just two days of experience with WSPR.

1. On 20 meters with 1 watt and a Miracle Whip INDOORS, pretty cool what can be accomplished.
2. On 30 meters with an outside end-fed half wave wire at 20 feet high horizontal, 0.5 watts, very impressive.
3. Not much results on 20 after sunset.
4. 30 is ALWAYS open to somewhere.
5. The database queries are cool.
6. Is there any analysis being performed on the data, like what was done with PropNETPSK several years ago?

Magnetic Loop Antenna

I have been using a Magnetic Loop Antenna from Alpha Antennas and I'm very impressed with the performance of it. I have this inside my shack and it has done almost as well as my full wave 160 meter loop at 40'. Check out my spots for the past week 11/27 on 20 meters.

Magnet Loop Antenna

160m 26-27.11.2013.Thank All

160m Antennas - Beverage toward Europe

Just want to advise our 160m operators that I currently have up a 160m Beverage antenna and a 1/2 wave Inverted V dipole.

As the Beverage is an RX only antenna, what I am doing is running the Inv V for the USA guys (TX/RX) until I head to bed, then switching over to the Beverage to run RX mode till sunrise.

The Beverage is a full wavelength on 160m, so 160m in length. It has been set up aimed roughly in Europe direction, about 310 deg. In theory, it should have a good front lobe toward Europe of about 60 deg. Its only about 1.1m above ground, and does cut out lightning static quite significantly. There could also be issues with Kangaroos hopping into the wire at night time, though I have been out and scared a few away last night and tonight. So if suddenly I stop hearing Derek, you could assume its been damaged.
The wire is 0.6mm single strand, insulated. I only have up about 1/2 the number of supports I wanted to run to hold the wire up, but its actually looking not to bad even with the supports at 20m intervals.

Last night was the first test run and saw good reports for Derek VK6DZ's signals, even though technically he is off the side a bit. There were no EU signals heard, but that could just be conditions.

Hope to hear some of you, good luck.

boujour a tous

du nouveau ici
j'ai un KX3, vraiment un super tx et biensur en QRP

je vais le servir en wspr sur 160 m
soit avec 5w ou 2 w

via un signalink usb et le cable pour le KX3

le tx chauffe vite a 60 c hi

merci pour tout rx de votre part

noel arrive bonne fête

hb9hfr michel

du nouveau ici


I have been running 1mW on 40m WSPR for the last couple of days and getting spots from over 2000km away. Such has been the success I have decided to go lower in power and will be going down another 10dB to 0.1mW. From the reports so far at the 1mW level I think I can go much lower still, but I'll try it in stages.

The WSPR program only allows power settings down to 1mW (0dBm) and I will have to keep that setting even though I am at lower power. Output power levels have so far been confirmed by measurement with an oscilloscope. It will be interesting to see how far I can get on these low levels.




Well, I just got my Raspberry Pi to listen to WSPR stations for me.
Wahoo! Now I get my laptop back for other things.

Why i am doing WSPR

I like to get a statistical feeling about conditions on 80m.

What i need is a receiving and a transmitting station which are not changing.
It will work all day for about 8 weeks.
After that i make graphs of the signalstrengths over that time.

I do not like to use my normal tranceivers for it, because i do not like
them to work for a 8 weeks continious. ( thunderstorms - lightning problems)
So i build some receivers and a transmitter.
I used the circuit diagram of the Bitx20a as an example.
I build all in so called Manhattan style.
All oscillators are a si570 chip which i do program with an AVR microcomputer.
So the frequencies are very exact and stabil.

This days i am just testing the apparatus.

Ham Radio Balloon on 7, 10 and 14 MHz in WSPR

This Saturday, November 16 Australian radio amateurs will launch a HF high altitude balloon, PSB-5, transmitting WSPR, JT65, THOR and Slow Scan Digital Video (SSDV).

1mW experiment

I'm currently transmitting on 20m, 15m and 10m using 1mW.

So far, my best spot is 1,065km, equivalent to >1,000,000 km/Watt ! (Thanks to SWL Dan I1-12387)

2013-11-13 07:28 G0LRD 14.097055 -23 0 JO02ac 0.001 I1-12387 JN44ln 1065 138

Ultimate 2 QRSS Beacon now on 40m and 20m

My Ultimate 2 QRSS transmitter ( continues to work great. I just received and assembled filter modules for the 40 meter and 20 meter bands, in addition to the 30 meter filter I already had. I'm picking up lots of WSPR reception reports on both bands. I also updated the firmware to the latest 2.06b version (using my Bus Pirate to program the PIC chip in-circuit). The new firmware allows transmitting on up to 3 different frequencies and modes.

Hans Summers is now shipping the Ultimate 3 version ( which has a backlit LCD and will work with an upcoming relay-switched Low Pass Filter board that will allow transmitting on up to 6 bands without having to change filter modules.

G to VK with <50mW on 10m

I've been running WSPR on 10m for a couple of days using a Hans Summers U2 transmitter feeding into a Sirio Gain Master aerial which is a vertical dipole.

The transmitter doesn't generate much RF on 10m - I set the power figure in WSPR mode to indicate 50mW although in reality, it's probably less than that. The needle on my Daiwa NS-660P with 15W FSD is moving barely a needle width from the bottom stop. If I had to estimate, I'd say I'm running between 20mW and 30mW through 20m of RG213 into the aerial.

This morning I was very pleased to see the following spot:

2013-11-12 09:58 G6NHU 28.126056 -27 0 JO01ou 0.05 VK6XT OF86td 14654 94

According to the WSPR-Watch app on my iPhone, that works out as 293,080 Km/Watt (see attachment).

Which impressed me!

73 Keith, G6NHU

Listening for VK on 160m this week

I've been very surprised by what I've heard on 160m this past week.

I heard VK2KRR this morning, and VK6DZ on the 7th, 10th, and today.

A few years ago, I remember seeing my cw skimmer decode a vk6 station on 160m. Up until now, I thought it was just a bad decode or some harmonic from another band on the sdr-iq.

I'll be listening on 160m from about 0400-1330 for the next 4 days. 12th through the 15th. Hope to get some more VK decodes and add them to the list at the end of the week.


2013-11-07 11:24 VK6DZ 1.838054 -26 -1 OF84ux 5 KB9AMG EN52tx 17606 61
2013-11-07 12:16 VK6DZ 1.838051 -19 0 OF84ux 5 KB9AMG EN52tx 17606 61
2013-11-07 12:24 VK6DZ 1.838051 -21 0 OF84ux 5 KB9AMG EN52tx 17606 61

2013-11-10 11:16 VK6DZ 1.838086 -26 0 OF84ux 5 KB9AMG EN52tx 17606 61
2013-11-10 11:24 VK6DZ 1.838085 -26 -1 OF84ux 5 KB9AMG EN52tx 17606 61
2013-11-10 11:42 VK6DZ 1.838073 -29 -1 OF84ux 5 KB9AMG EN52tx 17606 61
2013-11-10 12:26 VK6DZ 1.838072 -25 0 OF84ux 5 KB9AMG EN52tx 17606 61

2013-11-11 08:44 VK2KRR 1.838106 -20 0 QF34mr 20 KB9AMG EN52tx 15246 62
2013-11-11 08:58 VK2KRR 1.838107 -22 0 QF34mr 20 KB9AMG EN52tx 15246 62
2013-11-11 12:18 VK2KRR 1.838107 -23 0 QF34mr 20 KB9AMG EN52tx 15246 62
2013-11-11 12:22 VK6DZ 1.838071 -23 -1 OF84ux 5 KB9AMG EN52tx 17606 61


160 METER WSPR-15 WILL BE TRANSMITTING FROM 22:00 UNTILL 02:00 UTC 11/9&10/2013.

160m 08-09.11.2013

100 mW WSPR beacon office demo

Hello all,

We did put up a 100mW Softrock 14 MHz WSPR beacon PI4R at our office, feeding a FD3 windom 1.5 meters above the roof of a 7 storey building. 100mW, that's the same output power as a WiFi accesspoint here in Europe.

The reports you guys give to our beacon are plot in real time on an azimuthal map centered around our QTH. This display is put in the corridor of our office and shows each morning that our signal reaches Australia (18.000km) and each afternoon into central USA (8.000km).

73, Ben PA5BW

more than 14400 km with just 5w and a dipole on 80m


I appreciate so much the tools provided by I am a newcomer but its very helpfull to check ant condx and propagation.

Today I got a RX report from more than 14000km on 80.

2013-11-05 22:02 EA3KU 3.594101 -25 0 JN00jv 5 VK6XT OF86td 14499 103

really surprised

160m WSPR

Just to add my thanks to the creators, supporters and users of WSPR.
Best DX to date was yesterday, so really pleased:-
2013-11-04 18:54 VK2KRR 1.838103 -23 0 QF34mr +43 19.953 G8DYK IO85te 16800 10439

73 John

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