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Telephone Arc Transmitter, by Marconi Company, London, 1910
Inventory Number: 69632
Date: 1910
Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.
Inscription: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / NO 4772 LONDON" on brass plaque on base surface.
Size: 400 x 470 x 350 mm (maximum height)
Materials: Ebonised wood, bakelite, mica, brass, teak?, assorted metals, wood
Other Given Number(s): Christie's 53, Science Museum Loan 1924-500.
Notes:
Radio telephone arc transmitter on a teak? base with ebonised wood platform. It includes a brass and bakelite arc burner with a mica viewing port, a fuel tank, an anode-holder rotated by clockwork, a transmit/receive switch, a microphone on a jointed arm and an enclosed tuning scale. With identical sliding scales on both sides along with brass terminals marked receiver A, clips, microphone, earth, main A & B, resistance C & D. Brass terminals on rear marked primary inductance, primary conductance and secondary inductance.
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