triode
Datecirca 1916
Inventory NumberVT1238
ClassificationVacuum Tube
Subject
Maker
E.-C. et Alexandre Grammont
1899 - 1967
Cultural Region
Place of Origin
Dimensions9.1 × 5.5 × 5.5 cm (3 9/16 × 2 3/16 × 2 3/16 in.)
Material
Accessorieswooden case
DescriptionTM Type. This is a standard early amplifier vacuum tube. It has four pins to connect to each element (two for cathode). The cathode is a thin metallic wire that would be heated during operation. It is surrounded by a solenoid wire which is the grid, and then my a rolled metallic plate which constitutes the anode. The pin base is made of wood.
Signedon bulb: FOTOS
FunctionThis is a very standard triode made around the period of the war. As in other triodes, electrons are produced at the cathode and are accelerated towards the anode if they are connected to different voltages. This creates a steady current. The mesh that stands between cathode and anode, if connected to a voltage more negative than the cathode, hinders the circulation of some of the current, so if one connects the grid to a weak signal, the signal will be reproduced in the main current. It will be amplified.
E.-C. et Alexandre Grammont
Date: 1915
Object number: VT0532
E.-C. et Alexandre Grammont
Date: 1915
Object number: VT0533
Radio Corporation of America
Date: 1920-1930
Accessories: red cardboard cylinder case
Object number: VT5200
