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've been on 160m at night for the last two weeks. Last night was the worst night so far - with just two spots. I looked at the map and it was sparse. I wonder what is going on with the propagation. I started to read up on 160m propagation and my head started to spin. Something about an enigma wrapped in a mystery - or was it the other way around? I'll have to do some more reading.

Any insights out there from those on 160m?

Tonight is off to a better start.


I decided to do some low power runs, after chatting with some new friends on this site.
It's always amazing to see what low power (and good band conditions) can do!

TX setup is an IC706MKIIG turned down all the way to 1.4 Watts, fed to the tuner/antenna through a "green" 5X (voltage) Tektronix attenuator.

This gives us 1.4Watts/(5^2) = 0.056 Watts.

With this 56 milliWatts, here are some of the results:

OK here we go, a nice new Alpha Delta DX-CC antenna put up in the garden. I have loads of great reports from DX stations, I even hear loads of stations on wspr, but I don't get any spots. I can't work out what's happening!

Have now been using the loop for a few weeks now, have dropped the noise floor around 6dB by choking the loop feeder at the shack end.
Perhaps I'm around the floor now, doubling the loop area has not gained any s/n improvement, results now seem about the same as other UK stations. The loop is bandpass filtered, I have a simple method of sweeping the loop in place. The loop output goes into a HP 141 Spec anal with the Tracking gene driving a 6' square wire loop in the house so I can sweep the loop directly.

A large X1.6 solar flare occurred while I was listening on 10m. I saved a screenshot of the wspr screen to show the wavy signals that immediately followed the start of the solar flare at 1402z.

Files are here:

One file is the screenshot of my wspr screen. Notice the wavy signals at 1404z and 1406z.

The other files are a graph of the X-ray flux from the NOAA website. The flux rose very quickly at the start of the flare.

I just put a flex 1500 on the 43 foot vertical at 2 watts on WSPR-2 and hope to let it play for a long while.

2014-10-20 06:06 WB5WPA 3.594150 -24 0 EM13qc 5 F5OIH JN06ci 7889 46
2014-10-20 05:40 KD6RF 3.594129 -17 0 EM22lr 5 F5OIH JN06ci 7810 47
2014-10-18 05:54 K9AN 3.594169 -17 0 EN50wc 2 F5OIH JN06ci 6807 52
2014-10-20 06:06 KC9NBV 3.594096 -20 0 EM69oe 1 F5OIH JN06ci 6780 52
2014-10-18 06:24 KF9KV 3.594057 -25 0 EN52et 5 F5OIH JN06ci 6721 53
2014-10-20 05:40 K3GAU 3.594085 -19 0 EM89cv 5 F5OIH JN06ci 6527 53

I am new to WSPR, but I already have a question: Do you report your WSPR contacts (contests, WAS, DXCC, etc)?

With the seasonality of 160m, it is nice to see again friends. This morning, Frits was present to the RDV of 160m wspr. Once again, I heard its 500mw (last time 2013/10/09):
2014-10-18 03:58 W1FVB 1.838047 -27 0 FN44ej 0.5 F59706 JN07th 5467 59
2014-10-18 04:58 W1FVB 1.838044 -24 0 FN44ej 0.5 F59706 JN07th 5467 59
He tried to reduce to 250mW without success but it is only "postponed".

Frits wrote in his blog this morning(

Wasted several hours today trying to find a 6 character ML code that at least covered my suburb. Ended up improving over the default but the 6 character combinations are really too coarse - possibly ok for HF where the distances are huge, but more precision would be good for VHF.

Antenna - Inverted L, 80 ft, parallel LC to "resonate" on both 160M/80M, trapped for 40M, metal fence ground, total cable/tuner loss < 1.5 dB over full 3 bands.

About 45 ft is vertical, the remaining 35 ft horizontal, suspended between 2 trees.

The base parallel LC achieves simultaneous resonance on both 160M and 80M. Note that there is nothing magic about "resonance" - it's only purpose is to reduce the in-band SWR in order to reduce the feedline loss to below 1 dB over the entire 160M and 80M bands.

My beef is with POWER !!

Turn it DOWN !!!

The Wspr site greets you with :-
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.


During the afternoon, I have modified my RX antenna for low bands.
Hope catch DX on LF

73 de Vincent F5OIH

Struggling with this at the moment, so any suggestions greatfully received!
I'm using SDR# v1.0.0.1326 together with the FDD and WSPR 2.12.
RX frequency in SDR# set to 40 metres, 7.038.600 and hear and see WSPR traces in SDR# waterfall, (they stop when they should etc) but WSPR decodes nothing. RX noise level in the WSPR display seems high at (red) 21dB but can't reduce this at all.
Oh yes, the pc is an old core 2 running Vista

Many thanks for reading this,
John G8DYK

An RF-powered quadcopter supported antenna and findings of the VHF/UHF WSPR group will also be presented at the "Introduction to WSPR" session at 10:45 am on 11 October at the ARRL Pacificon Convention at the Marriott Santa Clara in Santa Clara, California.

40m - 1/4 Vertical or Horizontal Dipole
20m - 1/4 Vertical
15m - 5/8 Vertical
12m - 5/8 Vertical
10m - 5/8 Vertical

In this year I have a part of my summer vacation in Crete (south coast, Plakias bay) and got the idea to combine this with experiments with WSPR. It is vacancy with family and friends. So no time for radio QSO, but all time for eyeball qso!

Hello All
Myself and others will be txing WSPR on 630 meters tonight and almost every night.
Set your dial to 474.2 khz Upper side band.
You must have Experimental license to transmit .
You can rx and upload spots .
You will be surprised what you can hear on an 80 meter dipole.

73 Ken WG2XXM / K5DNL

Running 100 mW into a hex beam pointed SE from FM06, the conditions are incredible today.

Stations who copied me that were surprising, and show just how good the prop is on 10 meters: