To see how far I can get on low power - testing propagation at the same time. This tests my equipment and antennas as well of course. The fact that you can see how well a distant station can receive you is what I do it for.
Also, you can fit in WSPR alongside other things you are doing. In my case today it is chippping up a concrete floor, in inch-square pieces, on my hands and knees, with a chisel and a very large hammer.
Today WSPR has been about what power I needed to work Jon Ove, EA8/LA3JJ, on Fuertaventura in the Canary Islands.
At 11:44 he could receive me at +3dB when I ran one watt. So I cut it steadily to 50mW, at which stage I had fallen to -25dB. After that it dropped out and he cannot hear me now even though I am now running 200mW. Conditions change. It is 3159km from here to Jon Ove's location.
By dropping the power in this, a coupe of was I worked Chris 4X1RF (3833km) on 1mW. That is the equivalent of 3,833,000 km per watt.
|I do not intend to post here so often in future but I have a backlog!|