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Detector - Shaw, Crystal, 1913 Object Reg. No: ST 015475

Crystal detector, used in early crystal set radios. Designed by J. G. Balsillie, and made at the Shaw Works, Randwick, Sydney, Australia in 1913. The pyrite crystal in the holder was presented separately in 1925.

A detector is a rectifier that converts radio frequency voltages to direct current.
Brown insulating plate with brass fittings, which allow two sideways perpendicular movements achieved by two screws operated by knobs. A cup shaped holder contains grey material with wire arranged to contact the grey material. The height of the end of the wire can be adjusted by another screw.
Acquisition Information:
Purchase & Supplementary Donation from Australia: Post Master General's Department (PMG) Wireless Branch, 1925
Discipline: Technology
Dimensions: 53 mm (Height), 125 mm (Width)

More information

Tagged with: radios, radio detectors
Themes this item is part of: Information & Communication Collection, Early radio: transmission and reception, 1900 - 1914
Primary Classification: COMMUNICATIONS
Secondary Classification: Radio
Tertiary Classification: receivers
Manufacturer: Shaw Wireless Works, Sydney, New South Wales, Australia, circa 1913

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