Lundahl Microphone transformers

Microphone transformers

Microphone transformers are normally used for impedance matching:
At mic preamp input circuits to match microphones to preamp.
In tube microphones for matching high impedance tube circuits to normal output impedance.
In ribbon microphones to transform very low voltage, very low impedance ribbon motors to normal microphone output levels.

General properties of Lundahl microphone transformers:
PCB mount style (with exceptions)
High level capability
Excellent magnetic and electrostatic shielding
High mu cores (mu metal or amorphous strip core)