esp32_loraprs/extras/cad/README.md

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# FreeCAD tracker models
**Rubber duck antenna**:
- `antenna_base` - base for rubber duck antenna, to be printed with PETG filament.
- `antenna_cover` - cover for rubber duck antenna, to printed with TPU filament.
👉 Rubber duck antenna spiral widing was done with 1.3mm copper wire on 8mm aluminium scaffolding tube.
**Tracker case**:
- `aprs_tracker_e22_v2` - base for tracker case.
- `aprs_tracker_e22_cover_v2` - upper cover for tracker case.