First-cut OPT design for single-ended or push-pull stages. · in Transformers
audiomatching
First-cut OPT design for single-ended or push-pull stages. Enter Zp, speaker impedance, output power and lowest frequency. Get turns ratio (Np:Ns), minimum primary inductance, air-gap thickness (SE), and a DC + signal flux check to catch core saturation.
Output Transformer (OPT) — EI lamination core geometryOutput Transformer (OPT) — Single-ended vs push-pull settings
How to use
Two modes — Single-ended / Push-pull.
What it's for
Valve OPT first cut: turns ratio, minimum primary inductance, air gap and the flux check.
You enter
Primary impedance (Zp), speaker impedance, output power, lowest frequency, primary DC current (SE), tube plate resistance (rp), and core data (µr, design Bmax, current density).
You get
Turns ratio (Np:Ns), primary and secondary turns, effective source resistance, minimum primary inductance for your bass end, air gap and shim thickness for SE.
Flux check — DC flux, signal flux at the low end, and the total, flagged if the core saturates.
