F-deck's Hpf 3 *Verified*

[Zanius]

This is in the request section, posting here as well so it don't get lost.

Drawn and verified, very useful little preamp for giging with an upright!
I built it using a Tl074 and still is super transparent.

[masonsjax]

Thank you for your work on this! I am building one right now!