It works Sergei!
Did the sim using values of 30mH, 1.5k and 8200pf, and this is the resulting FR graph:
There is a signal atenuation of aprox. 2.7dB at about 10kHz,?
Looks really good for the application Pat mentined on his previous post.
The remainding question is... will be any suitable 30mH inductor wich could be used, that fits a regular BM700/800 mic body?
Thank you and kind regards!
HL