OR-0020 · Tekura · 1985
Tekura 4200 — Distortion Analyzer
Tekura Type 4200 · Distortion Analyzer · restored from Ser. No. 00589-B · Tekura, Oregon, USA, 1985
The restorer's note
An instrument that measures harmonic distortion — and, run backwards, adds exactly the harmonics you specify, to the tenth of a percent. "Clean distortion" is a contradiction only until you use this. Restored from a mid-80s revision-B unit.
Restored 2025 from 1985 hardware.