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.

Glad I found my way to this website. Now I can assess my antenna and it’s performance. Also I can use this to adjust the direction of its broad side signals to suit me needs!!

To have an idea about the 160m propagation, I tested during one night this feature. Using an FT450 with 5 Watts into a vertical antenna 10m high with a loading coil at the base.
The 24 to 25 April 2021.

VK4BA Running A WSPR beacon ON 20 METRES up to AMATEUR Radio Day on 18 APRIL.

Trabzon Turkey

In my previous post I forgot to provide a link to the charts.
Visit the charts at

73 John

Episode 2 brings new charts with a focus on regular winners of the "WSPR challenge" conducted by Remko PA3FYM and Rob PE1ITR at

View the charts to see the bands, times and SNR of every spot reported by winners of the RX section - as measured by total Km for all bands.

Entrants in the TX section can view their callsign in the charts for each band and SNR reported by the RX winners over a 24 hour period.
The charts reveal strategies used by reporters with the biggest ears on the planet.

Enjoy the WSPR challenge.
73 John VK4CT

I am new at WSPPRnet and i like to meet you in this net. Ilive in Apeldoorn in the middle of the Netherlands and I use Airsy HF+ Discovery and Icom IC-705

A new version of the RFzero library: has been released. It includes the new FST4W narrow digital mode with its four sub-modes. This enables the RFzero GPS controlled RF source to send FST4W, in addition to WSPR, as a stand alone transmitter.

Hi everyone. I've recently obtained my licence and have been associated with radio (11m ssb) since 1978 and enjoy making and experimenting with wire and antennas. I'm just getting started on Digital modes and like the idea of working QRP in voice and digital modes. 73's...Dave

When sending type 3 messages, i.e. a message with a six character locator e.g. JO65FR, in WSPR the call sign is hashed. This means that instead of sending the call sign a 15 bits hash code is sent. But the hash code is not unique to the specific call sign but "shared" with some other call signs. In such cases hash collision can happen if both transmitting stations are decoded by other stations irrespective of only one of the transmitting stations is sending type 3 messages.


I have finished the radio to 40m tried whisper Wow for $49 Just Wow

Just finished converting the Sirio New Tornado CB antenna to 20 and testing it with WSPR. Seems to work great. I'm hoping to catch some AustralAsia in the morning. Fingers crossed! More info on my blog. It's a simple modification and the antenna can be bought for under $100.