I am going to make the SWR meter enclosure out of sheet metal, and do the drafting in Fusion 360.
The plan for the enclosure is shown below: There needs to be a conducting shield between the tandem coupler and the log amp board. I'll use bulkhead mounted SMA connectors to feed the RF signals. I'll also put a shield between the detector board and the MCU/Display section. A 9V battery will go in the MCU section. Front panel controls will be a small battery switch, and a cutout for the OLED display.
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