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Portable Valve Transmitter, by Marconi Company, London, 1919

Inventory Number: 61008

61008-3t 61008-1t 61008-2t 61008-5t 61008-4t

Date: 1919

Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.

Inscription: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / NO 133049 LONDON" printed on brass plaque upon upper exterior surface. See Documents for other inscriptions.

Size: 275 x 240 x 180 mm (lid closed)

Materials: Brass, nickel, teak, bakelite?, paper.

Other Given Number(s): Christie's 48.


Portable Valve Transmitter, with single valve compartment, bakelite? aerial inductance (scale 0-180) and reaction coil (scale -90-+90) knobs, filament (scale OFF-3) and sliding resistance (out<-resistance->in) controls, Weston Ammeter (scale 0-10, 0-0.10), and 'Press 10 Amps' button. With earth and aerial nickel-plated terminals, hinged lid and two brass plaques on top surface; hinged lid on side. In teak case with removable front cover, circuit diagram pasted on interior of lid. Previously catalogued with Small Morse Key (Inv. Num. 71452).

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