Question

The output stage of a television transmitter is most likely to be a

• A. plate-modulated class C amplifier
• B. grid-modulated class C amplifier
• C. screen-modulated class C amplifier
• D. grid-modulated class A amplifier

Answer 1

Answer: (B)

grid-modulated class C amplifier

Answer 2

Because of their inherent distortion class $C$ amplifiers are never used as audio amplifiers, but they are primarily employed in the final stage of TV transmitters. Also, owing to low efficiency of class $A$ operations, these amplifiers are not employed where large RF (radio frequency) power is involved e.g., to excite transmitting antenna. In such cases class $C$ amplifiers are used, since a class $C$ amplifier has a very high efficiency, it can deliver more load power. In out put stage of a TV transmitter grid modulated class $C$ amplifier is used.