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   gigabecquerel (gigabecquerel@chaos.social)'s status on Friday, 13-Sep-2024 03:36:31 JST gigabecquerel

   I have acquired a geiger counter with a satisfactory number of buttons, dials and switches!

   Now I only need to find some 1.5, 15 and 75 V batteries for it, or fitting switching regulators. The count indicators are basically discretely built decatrons!
   Schematic is in the manual:
   https://orau.org/health-physics-museum/files/library/manuals/hoffman-countmaster.pdf