ANSWERS TO QUESTIONS Q1. THROUGH Q18.
A1. Conventional pentodes have a staggered grid arrangement, while power pentodes have a shielded
A2. Beam-forming plates.
A3. By increasing the number of electrons that reach the plate, plate current is increased.
A4. A large negative voltage causes conduction to occur only at the center of the grid
A5. Decreases gain.
a. Power pentode or beam-forming tetrode.
b. Conventional tube.
c. Variable-mu tube.
A6. It causes the control grid to short to the cathode.
A7. By reducing the spacing between tube elements.
A8. The close spacing of tube elements allows for the ready formation of arcs or short circuits.
a. They can carry more current.
b. They maintain a constant IR drop across the tube.
A12. The filaments voltage should be applied to the tube at least 30 seconds before attempting to
operate the tube.
A13. They have the ability to maintain a constant voltage drop across the tube despite changes in
A14. To visually display electronic signals.