WSPRering without computer; done.

In the quest for a simple WSPR homebrew transmitter, I had to step through the process of generating WSPR without a computer.

My on-the-air transmission of last night (2009-04-06) has proven that it is possible. Given that a WSPR beacon emits a cyclic time-invariant signal, its sound can be pre-recorded and re-played endlessly with a simple MP3 player.

I have described the design process "MP3 WSPR" and the result "Beginner's Luck" in a couple of posts on my personal blog.