Current record mode: basic


272 of 655 records      previous / next

Marconi Radio Valve Type MT1, by Marconi Company, London, c. 1919

Inventory Number: 48681

48681-2t 48681-1t

Date: c. 1919

Maker Details: Signed by Marconi-Osram Valve Co. Ltd.

Inscription: "10 TURN / GRID" handwritten in label stuck to upper neck of bulb. "Type MT / 3 ELECTRODE / Rating - Approx 100W / Used for Transmitting / 1920" handwritten on label stuck to main body of bulb.

Size: 140 mm in overall length (including electrodes)

Materials: Glass, nickel, assorted metals.

Other Given Number(s): Christie's 199.


Marconi Transmitting-Type Radio Valve (or Tube) Type MT1, with a ten-turn grid, and rated for approx. 100W. With medium glass bulb, nickel-plated interior filaments and anodes, and lacking base. With three electrodes protruding from the lower section of the bulb and a single electrode protruding from the upper section of the bulb.

272 of 655 records      previous / next

Record mode: Basic | Medium Images | Large Images | Documents (2)