My most recent build has been the WSPR receiver kit from Stellar which can be found at their site, http://www.stellarwspr.com
The kit contains everything you need to build a receiver on a pre-selected band, including cables for connection to the receiving PC. I plumped for the 30m variant after a crash course in WSPR and scouring the WSPR sites for the band with the most potential activity.
The provided instruction sheet is enough to walk you through the build. Just follow the sheet and you should have a working receiver in a few hours.
Unfortunately I didn’t but we’ll get to that in a bit!
Hind sight is a very exact science! If I was doing it again I’d leave the power and audio jack sockets off the board so I could mount panel them on the front of an enclosure. The way round this minor issue will be to mount the board as close as possible to the panel and drill large enough holes to allow the supplied jack plugs to connect to the PCB mounted sockets.
With a bit of care the on board LED will be removed and panel mounted, along with a SPDT toggle switch connected to a jumper connector to allow easy selection of the input source to your sound card be it mic or line in. A panel mount BNC connector will finish the job off to make things a little more ruggedised and portable.