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.
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?