Hi Michael and the group... Does anyone have a schematic for the Piggy Back? >From the picture on the web http://www.nlsa.com/labjack/labjack_piggyback.html the components are easily identifiable and readily available, including the olde molde golde U-12 for a DIY project. Thanks and 73, Alan VE4YZ AMSAT LM 2352 http://www.mts.net/~ve4wsc/ AMSAT A-485