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Short Distance Wireless Telephone Set Type TT2, by Marconi Company, London, c. 1920

preview image for Short Distance Wireless Telephone Set Type TT2, by Marconi Company, London, c. 1920
Inventory Number: 46879
Object Type:
Place Created: London England United Kingdom Europe
Accession Number: 2004-9/597
Brief Description: Short Distance Wireless Telephone Set Type TT2, with ebonite vertical front panel in teak case. With three DEV valves, potentiometer sliding condenser (scale 0-6), Vulcan glass-fronted halfmoon ammeter (scale 0-500milliamperes), and assorted bakelite controls: aerial tuning dial (scale 0-180), receiver reaction coil (scale -90,0,90), transmitter reaction coil sliding control, aerial coupling coil sliding control, send/receive switch, all upon front vertical ebonite panel. With seven lacquered brass terminals (five marked for power, two marked "MICROPHONE"), large Post Office-type glass bulb valve with red bakelite apron, and unmarked sliding control upon upper exterior surface of case. With lacquered brass aerial and earth terminals upon left-hand side of case exterior surface, and dual lacquered brass telephone terminals upon right-hand side of case exterior surface. With detached lacquered brass terminal. With associated photocopied article.
Primary Inscriptions: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / No175707 LONDON" etched on exterior surface of front vertical panel. "MILLIAMPERES / VULCAN" printed on interior of ammeter face.
Provenance: Presented by the Marconi Corporation.
Collection Group: Marconi Collection
Material(s): Teak
assorted metals.
Height Width Depth Diameter Unit
530 220 320 mm


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