SolderSmoke Daily News: Homebrew WSPR from W3PM

Published on 2009-03-03 by Mark VandeWettering

Bill posted today about W3PM’s design for a dedicated WSPR beacon transciever. It’s very slick: basically a crystal oscillator that can be mixed with the signal from a PC sound card, then piped through a narrow crystal filter and through an amplifier chain into an antenna. Check out the PDF, it’s quite nice.