915 MHz rat-race shielding box

Rat-race shielding box — exploded 3D drag = orbit · wheel = zoom · right-drag = pan grey = 3D print (wrap in Cu tape) · green = CPS rat-race PCB · gold = WE 60312202114509 SMA ×4 · lid exploded +30 mm copper straps = Cu-tape bond, one per side of each SMA: soldered to the connector BODY side face (the wrap face is offset 4.6 mm and the nut sweeps the barrel there — a collar would block mating), routed along the slot wall 1.8 mm outside the nut sweep, folded onto the wrap and soldered dark plug + cable mated at Δ: the coupling nut enters the 13 mm slot over the barrel threads — clearances: 0.74 mm below nut, 1.94 mm each side, 3.4 mm in the lid-skirt cutout CM options on the two cables: Δ wears 2 snap-on ferrite rings (61 material, clamp over jacket, NO solder, ≈−45 dB with straps) · Σ wears the λ/4 sleeve (open mouth 2 mm off the wall, 360° soldered short 82 mm out, −53.5 dB with straps)