Microphone Preamplifier Board

Full Writeup Coming Soon!

A preamplifier and power board I made for a stereo electret measurement microphone rig. This PCB is optimized for the Primo EM258 or Panasonic WM61 but may be used with others with some resistor value adjustments.

Fresh bare PCB’s, expo marker for scale.

A fully assembled board.

The hand-soldered LDO, with tweezers and solder wire for scale.

The back of the board.

The circuit schematic.

PCB layout, sans ground and power planes for clarity.