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'm new at a QTH and am RX only due to lack of HF antennas - I've tried internal antennas but local QRN flattens most WSPR frequencies.

I've connected my FT897 to my colinear for VHF/UHF for RX. I've just begun rxing stations.

A few mins ago on 30m (9th Jan 2010/15 my system incorrectly decoded EB1EHO as 4T/EB1EHO - it's corrected on the next decode.

Dave G0CER

I didn't expect much but the EH Antenna in the loft which is propped up at a 45 º Angle in a due east direction did make some European Contacts but appeared to display directivity. Going to play with this some more !

I'd like to try a WSPR QSO with VK6 around your local sunrise - maybe tonight (our time) early morning your time? I will be CQing on 3575.45 tonight starting at 20:50z until 21:50z. I know it can be done on CW.

So what happened on 3575.45 tonight between 2050z and 2150z?

  1. SP3IY calling me at 2108z SN=0dB, but did not send a report.
  2. RA3ALW CQing at 2120z, 2124z from KO85, SN=-5dB, slight QSB.
  3. OE1LIC calling at 2148z, SN=-7dB. Stopped after first minute TX, QSO not complete.

So much for tonight.

trying to make some QSO's
calling CQ in WSPR mode on 3575,45

With 37db and an self-made ofcd about length: 78m I have had the confirmation of receipt on 40m band of VK6ZRY (13577 km)end VK6BN (13593 km).
Not badly as I begin.
73 Massimo.

I am fairly new to wspr, I have been running the software periodically for a couple of weeks, and have started pondering how to relate this information to "real world" scenarios. I have come across a figure of -10dB SNR as a minimum usable signal level to decode PSK31 transmissions. If I look at most the spots where I have been received, I am usually well into the "minus teens or twenties". Has anybody looked at whether there is a predictable correlation between changes in transmit power and changes in received SNR? I transmit at 37dBM (5W). If I were to double my transmit power (3dB increase), would there be a predictable amount of change in SNR at the stations that receive me, or are there too many factors that affect my receive strength at any given station. Ultimately, I would like to see if we could use this wspr data to predict, for example, how much power should I expect to need to use to get a reliable PSK31 signal into Germany, from North Carolina, on 40m with enough strength to be received.

Today I installed WSPR 2.0 to experiment with QRP. I think this will be my favorite...
After some "technical problems" it worked properly with 5 watts even on the 80m Band (I have no appropriate
antenna for 80m). Well, today's goal was just to become familiar with WSPR. It is generic and "feels good".
I am positively surprised of that radiowave propagation and I will fine tune the system asap.

hello, to all i'm a newbie of wspr from italy. i trasmit from jn56mj with 5 watt in a long wire antenna beam est/west .next fays i will operative on 6 and 2 meter with an vertical antenna for 6 meter and 17 el. yagi for 2 meter. stay tuned !

Well, my 80m Carolina Windom seems to work well with 0.5w so thought I'd use that for a bit of CW practice. For WSPR today just using 0.5w into a directly attached Miracle antenna. Shack noise already rather apparent.

This is my little configuration for WSPR mode receiption: YAESU FRG-100 and homebrewed 70cm long active rod antenna in middle of the house in basement floor.

I am interested in comments of other members as to minimum practical transmit power for 160 WSPR. Thanks, Tom N8TL

Coolest thing since sliced bread!

Hello every body, and happy new year for all.

In the little spare time during xmats (between drinks and happiness) I developed the initial structure for the graph plotting, and 2 simple graph (attached to this post) for evaluation, the plots shows only data for dec 1 to dec 16 (that's all data i have downloaded before xmats holidays, remember I only have Internet in my work place, a dialup at 33kbps)

Tell me what you think about it, and give me ideas for new plots.


For more than month I am running RX WSPR with my ZetaSDR receiver, and Rocky software on 80 m. Despite the "antenna" which is just ~17m of wire in building closed environment and industrial site, results are quite good. When conditions are better WSPR stations of Uk and around are received even in daytime. Planning to run test on fullsize 80 m antenna. The only problem is that frequency of received station is displayed incorrectly by several Hz, because Rocky can not change freq in Hz. Will see a solution for that.