Answer | Crossword Clue |
---|---|
pentode | vacuum tube having five electrodes, usually a plate, three grids, and a cathode, within the same envelope |
pentodes | vacuum tube having five electrodes, usually a plate, three grids, and a cathode, within the same envelope |
tetrode | vacuum tube containing four electrodes, usually a plate, two grids, and a cathode |
tetrodes | vacuum tube containing four electrodes, usually a plate, two grids, and a cathode |