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.

Tomorrow, I will be making a change which will redirect all access to the wsprnet community drupal web site (this site) from to You may need to login again to create a new session. This is in preparation to move the interactive user site to another server to improve performance and separate that functionality from spot reporting.

Site changes for new WSPR FST4W modes

Since around version 2.1.1 wsjt-x has been uploading a `mode` value that WSPRNet has not been consuming. With the advent of new FST4W quasi-beacon modes we will now consume that value.

Going forward we will process the `mode` according to 4 values:

  • "2"
  • "15" for the current WSPR modes -2 & -15
  • "5
  • "30" for the FST4W modes 300 & 1800

This change applies to the manual upload too, i.e. WSPRNet will support an 11th column `mode` which can be one of these above 4 values.

[From Admins] Map issue -- a fix of sorts

The issue with the Google Maps is related to the change Google made on July 16th, 2018 that severely curtails the free API limits. WSPRNet will be transitioning to an alternative mapping solution as soon as possible.

In the interim I have added a new field to the User Profile form for storing your own Google Maps API Key, if you want to get back to the way things were. You can get your own API Key by following the link below and I would strongly encourage you to read the Q&A down the page.

Zachtek mid set for 30 and 40m into 30m end fed long wire with ATU tuned for 40m (antenna 10 on
Zachtek high set for 10, 12 and 15m into 24MHz 1/4 wave vertical (antenna 11 on

Success at last. GPS Discipline was necessary to get decodes.

The other changes I made in the meantime: antenna and ground - appeared to help.
Pretty good results for a compromise antenna in horrible conditions.
I'll take it !

Antenna: Superantenna MP1 parts, mostly from a pre-2010 kit.

Concluded at 3:15 AM UTC 8/7/2022

I left this beacon running for quite a while, and it's just not making it.

I'm now making refinements to cabling, antenna, etc.
Perhaps most importantly, connecting to GPS receiver for time and frequency sync.

This time, I'll make a trial run on 20m CW and have some fun that way before
trying beacon mode again.

I'm thinking the three factors contributing to the failure to make a contact:

  • Transceiver alignment
  • Timing (manual instead of GPS disciplined)
  • Antenna

Beginning test WSPR transmissions at 05:56 UTC 7/12/2022


Actual power < 1 watt

Antenna is not well matched and is inefficient

ERP is therefore minuscule

I hope my WSPR is going out on 6 Meter I had a request to use it. If there is a issue please let me know @ denise9999901@outlook. KD2YGN

Launched on the 14th of april on a Yokohama balloon, a wspr tracker with PA3DJR callsign.

Transmitting 4 bands,

minute zero at 10 meter
minute two at 15 meter
minute four at 30 meter
minute six and minute eight on 20 meter. (default and telemetry extended)

Antenna wire is 1/4 wave for 20 meter, 503 cm from antenna out hanging down and 1/4 wave for 10 meter, 251 cm, up from ground connection to balloon.

Appears to make a great resonator for 15 meter , over 80 percent of the reports comes from the 15 meter band transmission.

Hello WSPR friends,

I notice that the spotter M0LMH generates wrong spots in the database as follows:

2022-05-02 12:58 R3AHC 14.097102 -22 0 KO85uq 1 VK4CT QG62jv 14021 86 2
2022-05-02 05:58 R3AHC 14.097101 -20 0 KO85uq 1 EA8BFK IL38bo 5041 255 2
2022-05-02 05:38 R3AHC 14.097104 -22 0 KO85uq 1 CT1EBQ IM58gr 3930 262 2
2022-05-02 06:18 R3AHC 14.097102 -19 0 KO85uq 1 CT1JF IM68an 3850 260 2
2022-05-02 06:08 R3AHC 14.097102 -16 0 KO85uq 1 CT1JF IM68an 3850 260 2

I have noticed, that someone in grid JN55sm is using my call OH1HPZ for WSPR in different bands. The real me is operating from OH-land, Finland.

New to this that's why m7 be kind and helpful 73s and Ta