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Rotary Attenuator in Case, by Elliott Brothers (London) Ltd., Mid 20th Century

Inventory Number 13138

Acknowledgement: © History of Science Museum, University of Oxford, inv.13138

Item type
Object
Provenance
Presented by the Marconi Corporation in 2003.
Primary inscriptions
'ELLIOTT SERIAL NO. 780 / PAT NO. 691.939 / OTHERS PENDING / ROTARY ATTENUATOR TYPE B204 / ELLIOTT BROS (LONDON) LTD CENTURY WORKS / LONDON S.E.13. ENGLAND'
Other inscriptions
'1526M'
Physical material
Metal
Glass
Bakelite?
foam
Object type
Electronic instrument
Dimensions
Height: 85mm Width: 510mm Depth: 80mm Weight: 5.35kg
Inventory No
13138
Accession Number
2003-11

Description

An attenuator is an electronic device that reduces the power of a signal without appreciably distorting its waveform. The Rotary Attenuator, by Elliott Brothers is made of metal with a rectangular body and two long tube shaped arms. There is a glass circular window which displays the reading. It is housed in a branded black case with metal fittings.

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