Hello, all I upload schematics on my site.
http://zao.jp/radio/GPS/ This schematics is including Soft66ADD. There is few different point with PCB. Si8420 may be changed to ADUM1300 or ISO7230. This design is GPL. Because I learned many technic on the web world. I hope you can build more better receiver than Soft66. best 73 Miura JA7TDO
