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Marconi Bellini-Tosi Direction Finder, by Marconi Company, London, c. 1916

Inventory Number: 20815

20815-3t 20815-1t 20815-2t

Date: c. 1916

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

Inscription: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / NO 155010 LONDON" etched onto upper surface of ebonite panel.

Size: 290 x 220 x 255 mm (excluding dials and terminals)

Materials: Teak, brass, bakelite, ebonite, steel?, copper.

Other Given Number(s): Christie's 59, 783/2 (white tag), Science Museum Loan 1936-270.


Marconi Bellini-Tosi Direction Finder, with double index, copper and steel? cylindrical rotating core and dovetailed teak case (sides cut away to reveal interior). Topped by ebonite surface with bakelite knob and dial marked "DIRECTION FINDER" (scale 0-360). With ten brass terminals: a pair on the left hand side (marked "TO RECEIVER TERMINALS & TUNING CONDENSER TERMINALS") and four pairs on the right-hand side (marked "A" - "H"). Accompanied by paper leaflet stating "Part of Marconi-Bellini-Tosi System Wireless Direction Finder Pat.I907". Previously associated and catalogued with Tuning Condenser and Album of Direction Finder (Inv. Nums. 75237, 34635) .

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