The Tektronix 183 is a rotational analyzer for use with the 182 angle-encoding transducer. The 183B appears in the 1961 catalog.
The Tektronix 182A and 183A were furnished as a set, since the calibration of the 182A was part of the 183A. This was changed in the 182B and 183B series, so the 182B rotational transducer and the 183B rotational analyzer were completely interchangeable. Consequently, "A" series and "B" series models may not be mixed.
The 183's predecessor might be the 32TU.
- Tektronix Rotan System 182B/183B in 1961 Catalog (PDF)
- 182B/183B Photo-Rotational Analyzer Manual (PDF)