c. prevent the modulated amplifier from oscillating.
d. prevent the grid from being driven to the zero grid bias point.
7. One favorable characteristic of a transmitter that uses low-level modulation
b. the transmitter has high efficiency.
c. audio-frequency power requirements are relatively low.
d. the modulating voltage is applied to the final power amplifier.
8. What are
a. Plate and screen grid modulation
b. Plate and control grid modulation
c. Plate and suppressor grid modulation
d. Screen grid and control grid modulation
9. The proper phase relationships between input voltage, plate current, and
plate voltage appearing in a grounded-grid amplifier are shown in figure 2-1 in the
10. One of the characteristics of a grounded-grid amplifier is that it
b. operates best on very high frequencies.
c. is best suited for use as a modulator.
d. needs very little RF driving power.
accentuate certain frequencies in the usable speech range while attenuating all
The primary purpose of this type circuit is to reduce the
a. improve tonal quality.
b. retain intelligibility.
c. strengthen carrier power.
d. improve naturalness of speech.