This directory contains Eagle CAD files as well as schematic PDFs and Gerber exports for board fabrication.
The board stackup is good enough for either OSH Park 4-layer, or JLCPCB 4-layer with controlled impedance (JLC2313).
Revision 11.5.2 does away with the (hard to source) regulator from ST and replaces it with a Zener + NPN combination that delivers about 8.5V to the PA under load.
These directories contain Eagle and FreeCAD files for the NMEA0183, NMEA 2000 and USB adapters. Their front panels are PCBs so gerbers are here as well. The UART+USB adapter is a very basic breakout board for those who would rather wire the transponder themselves.
This directory contains FreeCAD and STEP exports of the 3D printed parts that make up the antenna.