2006-12-20 23:40:16 · 3 answers · asked by nagant39@sbcglobal.net 2 in Science & Mathematics ➔ Engineering
A triode is a type of vacuum tube (or valve in British English) with three elements: the filament or cathode, the grid, and the plate or anode. The triode vacuum tube was the first electrical amplification device. The principle of its operation is that, like in a vacuum tube based diode, the heated filament causes a flow of electrons that hit the plate and create an electric charge to it. The control grid is then charged negatively to repel some of the (also negatively charged) electrons back towards the filament: the larger the charge on the grid, the smaller the charge created on the plate.
A pentode is a multi-grid vacuum tube, which was invented by the Dutchman Bernhard D.H. Tellegen in 1926.
2006-12-20 23:44:15 · answer #1 · answered by Cawmaster 3 · 5⤊ 0⤋
For completion I would like to add that there is indeed a combination of Triode and Pentode in one tube (or valve), like model ECL86 where "C" always stands for a triode, and "L" stands for a pentode. (The "E" stands for 6.3V heating wire voltage).
2006-12-21 13:10:15 · answer #2 · answered by Marianna 6 · 1⤊ 0⤋
IN A DIODE VALVE IF A GRID IS KEPT BETWEEN THE CATHODE AND THE PLATE OF THE DIODE THEN SUCH A DEVICE IS CALLED TRIODE AND I THINK PENTODE IS A COMBINATION OF TRIODE AND DIODE
2006-12-20 23:45:34 · answer #3 · answered by bosco 2 · 0⤊ 4⤋