Triode Electronics:On Line Studio Electronics Diagrams
DIY Racked 175B VariMu Case - DIYRE Wiki
Build a tube Mic Pre: Build Your Own Two Channel Vacuum Tube Mic Preamp! | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording
A Simple One-Tube Compressor Circuit c.1953 – Preservation Sound