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Short Wave Receiver Type CM294C, by Marconi Company, USA, 1917

Inventory Number 46600

Acknowledgement: © History of Science Museum, University of Oxford, inv.46600

Item type
Object
Provenance
Presented by the Marconi Corporation.
Primary inscriptions
"SHORT WAVE RECEIVER / MADE FOR NAVY DEPT. (BU. STEAM ENGINEERING) BY / MARCONI WIRELESS TELEGRAPH CO. OF AMERICA / REO. NO. NSA 595 CONT. NO. 31415 DATE 1917 / TYPE NO. CM294C TRIAL NO. 341 / WAVELENGTH RANGE 250 M TO 3100 M" printed on brass plaque on front vertical panel.
Object type
Radio communication
Dimensions
Height: 280mm Width: 495mm Depth: 275mm Weight: 12.95kg
Inventory No
46600
Accession Number
2004-9/154

Description

Short Wave Receiver Type CM294C, with coupling, primary and secondary inductance and condensers, stopping condenser, tickler coupling, on ebonite front vertical panel. With brass primary inductance wavelength dial (scale A-G), missing dial, halfmoon coupling dial (scale -30,0, 120), stopping condenser knob, secondary inductance wavelength dial (scale I-IV), tuned/send/untuned dial, sec. fine adj. knob, tickler coupling dial (scale 0-10), and buzzer test push button; with bakelite knobs and dials. With aluminium? dials for primary and secondary condensers with a main scale of 0-180 and additional other scale. With pairs of steel terminals for pri. load coil, antenna & ground (on left hand side), sec. load coil, re audion ra, tickler, telephone, audion telephone, and buzzer battery (right hand side). Rear section is uncased and reveals steel, copper and nickel-plated condensers, inductors and components. On mahogany? base.

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