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Signal Receiver Type 57A, by Marconi Company, England, 1959

Inventory Number: 40275


Date: Dated 1959

Maker Details: Signed by Marconi Instruments Ltd.

Inscription: "R MARCONI INSTRUMENTS LTD. ..." painted on front vertical face. See Documents for other inscriptions.

Size: 660 x 320 x 220 mm (case)

Materials: Steel, plastic, bakelite, glass, assorted metals.


Signal Receiver Type 57A, with black enamelled steel case with multiple controls and displays upon front vertical surface. Controls include multiple scale 360 degree frequency control with clear plastic multiple-scale reader, glass-fronted half-moon carrier/modulation display (scale 0-100), output voltage dual scale & dial (scales 20dB-0dB, 10-0), range scale & dial (assorted ranges in megacycles & kilocycles), incremental tuning dual scale & dial (scales -50,0,50 and other non-linear scale), percent modulation dual scale and dial (scale 75-0). All dials and knobs are polished black bakelite. With dials for multiplier (units volts), continous wave, set modulation, set carrier. With off/on supplies switch and external modulation control. With power cable plug terminal at rear.

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