Dynamic mic preamp runs off “phantom power” from uBITx

This circuit from Paul K8PD assumes phantom power (~8V DC) is on the Mic Audio line (which is the case with the µBITx).  Given the small number of parts this can be “sky wired” and “shrink wrapped” into a small assembly with fly leads that will fit inside many dynamic mic bodies.


One Reply to “Dynamic mic preamp runs off “phantom power” from uBITx”

  1. I have a question about preamp schemetic.

    Is R2 1K resistor actually (2) 500ohm resistors with C1 connecting between the two ?

    Or if R2 1K is a single resistor, does C1 connect to the + or – side of the microphone element?

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