Catalogue
272 of 655 records previous / next
Marconi Radio Valve Type MT1, by Marconi Company, London, c. 1919
Inventory Number: 48681
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.
Notes:
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)