This is a clone of Alex Rice's Piezo preamp, from the drawings at
http://www.zachpoff.com/diy-resources/alex-rice-piezo-preamplifier/

I've setup the .brd file for single sided SMD, with the aim of being
as small as possible, hopefully to fit in a fizzy drink bottle lid
like my hydrophones.

Prototype V1: 2/4/2012
http://www.flickr.com/photos/matthewvenn/7038507997/