Some time ago at OpenBTS and GnuRadio mailing lists we announced a new universal clocking board for USRP. One of it's ample features is an ability to drive USRP at 52MHz with enough stability to run OpenBTS smoothly. This week we finally received manufactured PCBs and are in process of preparing testing samples. Main batch of PCB will be passed to population soon and we hope to make them available for shipping in the beginning of December.
Here are some PCB pictures for now: