Lotus JohnH Attenuators
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Layer by layer

Inside

The Lotus is a stack: two boards, a heat sink and a fan, clamped together and closed in a shell under a copper-inlaid lid.

  1. Lotus M3, stage 1 of 6: the array
    1 The array. The attenuation stages, on a solid aluminium PCB. Each value is made from a group of standard resistors, chosen to land on the panel's numbers.
  2. Lotus M3, stage 2 of 6: the control board
    2 The control board. Input, output, the fan circuit and a home for the coil.
  3. Lotus M3, stage 3 of 6: the fan
    3 The fan. 92 mm fan and 10 mm heat sink.
  4. Lotus M3, stage 4 of 6: the panels
    4 The panels. Front and back are circuit boards: matte black mask and exposed copper art.
  5. Lotus M3, stage 5 of 6: the shell
    5 The shell. Printed in PET-GF.
  6. Lotus M3, stage 6 of 6: the lid
    6 The lid. Printed in black glass-filled HTPLA with a copper HTPLA inlay: the lotus, the ripple vents, and a rosette over the coil.

Views

Rendered from the CAD model.