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Crystal Valve Receiver, by Marconi Company, London, c. 1910
Inventory Number: 69868
Date: c. 1910
Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.
Inscription: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / NO 105208 LONDON" etched into ebonite surface. "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / .01 CAPACITY / PATENT NO 15909/06" etched on capicitance dial.
Size: 315 x 275 x 130 mm (height excluding dials and knobs)
Materials: Teak, ebonite, brass, bakelite, copper, metal.
Other Given Number(s): Christie's 51, FE2 (cream tag).
Notes:
Crystal receiver'>Valve Receiver, basically of Type 16 structure (with four battery terminals rather than three), but with contacts for two FE2 valves and one four-pin valve in place of both crystal detectors. With aerial tuning inductance valve (OFF, MIN, MAX), capicitance dial (scale 0-9, SHORT), jigger switch dial, and battery and telephone terminals, upon ebonite surface on teak case. Lid is detachable. Originally included stencilled instructions and a circuit plan for a Crystal receiver'>Valve Receiver Type 16.
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