2 layers190.1 × 71.6 mm

OSDEHA AMP
mbrennwa/OSDEHA
Amplifier for electrostatic headphones using directly heated triodes in the output stage
85 parts2CERN-OHL-S-2.0
Boards in 1 GitHub repository, designed in KiCad, that use the ZY43 by DIOTEC (-50℃~+150℃ 1 Independent 1uA@20V 2W 40V~46V 43V ±5% DO-41 Zener Diodes ROHS). See how each wires it, with its parts, size, README and files; the ZY43’s symbol, footprint and pinout are on its own page.

mbrennwa/OSDEHA
Amplifier for electrostatic headphones using directly heated triodes in the output stage