g3cwi's blog

We have upgraded the WSPRlite firmware to support Type 2 and 3 WSPR messages (compound callsign and six character grid). This upgrade, together with the ability to run a WSPRlite from an Android phone makes it a handy package for a little holiday WSPRing. In this configuration, the WSPRlite gets its grid and timing from the phone (internet connectivity needed). It can also be powered from the phone!

In time for the eclipse, we have just released a free Android app for WSPRlite. WSPRlite-to-go allows you to program and use a WSPRlite in the field. It uses timing and location data from your Android device too.

WSPRlite-to-go is a free download at https://play.google.com/store/apps/details?id=net.dxplorer.wsprliteconfig

73 Richard G3CWI

I spent a pleasant morning yesterday using WSPR to compare a Chameleon P-Loop with an Alexloop.

Details here:


73 Richard G3CWI

DXplorer.net is a handy tool for charting HF propagation. The picture shows 30m over the last two days. The disturbed conditions last night are clearly visible as is the negative effect on today's propagation. All WSPR users can use DXplorer.net on 20m - 160m.

We issued a new version of the WSPRlite config app today. This corrects a bug in our random frequency assignment algorithm.

We have also issued the Config app source code for third party developers.


73 Richard G3CWI

We finally have stock of our WSPRlite system. WSPRlite is a small standalone WSPR transmitter that covers 20 thru 160 metres. When used with our analysis website http://www.DXplorer.net , WSPRlite provides a unique way to compare antenna systems in real-time. The basic facilities of http://www.Dxplorer.net are available for all WSPR users to experiment with.


73 Richard G3CWI

The attached screenshot shows a series of nighttime spots between the UK and Denmark. I often see similar runs but to different Scandinavian locations. They are always very specific paths. My theory is that they are the result of E layer propagation from the northern wall of the mid latitude trough. This dips south in slightly disturbed conditions. Is that a likely explanation?

Hi folks

We have developed a way of testing antennas using WSPR. It consists of a special WSPR transmitter (WSPRlite) and a website (www.DXplorer.net).

The website is available for anyone to use - you don't need a WSPRlite. It works well on a phone, tablet or desktop. It's a neat and unique way of looking at WSPR data. If you have a beacon running on 160-20 m give it a try with your own callsign. www.DXplorer.net

I teach physics at a high school. Two WSPR projects come to mind for my students to develop:

1) A solar powered WSPR beacon to be deployed in a challenging environment in the Atacama desert. I have contacts on the ALMA project:


2) An ocean current monitoring beacon using "on the fly" position encoding to measure currents in the North Atlantic.

Any other ideas out there?