2 layers38.2 × 37.9 mm

NixieSupply5vto160vDCMBoost
drkmsmithjr/NixiePowerSupply
170v Nixie Tube Power Supply from 5v Supply
47 parts98MIT
Boards in 1 GitHub repository, designed in KiCad, that use the MMBT4240 by STMicroelectronics. See how each wires it, with its parts, size, README and files; the MMBT4240’s symbol, footprint and pinout are on its own page.

drkmsmithjr/NixiePowerSupply
170v Nixie Tube Power Supply from 5v Supply