Tuned Circuit Transmitter, by Marconi Company, London, c. 1900
Inventory Number: 64464
Date: c. 1900
Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.
Inscription: "MARCONI'S WIRELESS / TELEGRAPH COMPANY LTD. / LONDON" printed on plastic label attached to vertical surface of frame. "No 3" printed on circular celluloid label upon base.
Size: 280 x 280 x 155 mm
Materials: Mahogany, plastic, celluloid, brass, glass, steel.
Other Given Number(s): Christie's 174, 15 tuned circuit (white sticker).
Tuned Circuit Transmitter, with square mahogany frame and carrying two windings. One of these is in series with a Leyden jar and the spark-gap, the brass balls of which were connected to the terminals of an induction coil. The other winding, consisting of a single turn, was connected between the aerial and the earth.