a. M1, M3, and M5.
c. M3, M4, and M6.
b. M2, M3, and M5.
d. M4, M5, and M7.
9. When key S is raised, V2 develops no grid bias, because of loss of
excitation; consequently plate current rises to a high value. The safety bias that
limits plate current to a safe value is developed by
a. resistor R11.
c. capacitor C8.
b. resistor R24.
d. inductor L6.
the plate tank circuit of the intermediate power amplifier must be tuned to the
a. fourth harmonic of the buffer.
b. third harmonic of the oscillator.
c. fourth harmonic of the oscillator.
d. second harmonic of the oscillator.
11. High-power radio transmitters normally contain several power supplies to
serve specific functions. The power supply that has its positive side grounded is
identified in the schematic as the
a. high-voltage rectifier.
c. driver rectifier.
b. exciter rectifier.
d. bias rectifier.
12. In which stage are the tubes connected in parallel?
a. The modulator stage
c. The modulator driver stage
b. The high voltage rectifier
d. The intermediate power amplifier
13. The buffer-doubler stage has no neutralizing capacitor because tube V2
a. is a beam power tube.
b. operates at audio frequencies.
c. operates only as a straight amplifier.
d. is operated in a linear manner so that there is no feedback voltage.
14. If the plate voltage for V1 were to have a 120 Hz ripple it would indicate
that
a. inductor L15 is open.
c. capacitor C17 is open.
b. resistor R10 is open.
d. the filaments of V7 are open.
321 L4
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