Assume that you are assigned to a signal company as a radio repairman. One of
your first duties is to familiarize yourself with the transmitters you must
maintain. One of them is similar to the one shown in the schematic in figure 99 of
Exercises 18 through 20 are based on the above situation.
18. The source of the plate and screen grid voltages of oscillator V1 is the 400-
volt power supply. If the supply voltage decreases 10 volts, what voltage values
appear on the plate and screen grid?
a. 200 volts on the plate and 210 volts on the screen grid
b. 210 volts on the plate and 200 volts on the screen grid
c. 210 volts on both the plate and screen grid
d. 200 volts on both the plate and screen grid
19. Assume that the input signal to V6 has a frequency of 31.8 MHz.
crystal oscillator (V3) is operating at a frequency of 2.65 MHz, the first and
second multipliers must be acting as
a. a tripler and a quadrupler.
b. a doubler and a quadrupler.
c. a doubler and a tripler.
20. Meters are installed in critical transmitter circuits to facilitate tuning.
When meter M2 is connected to points G and H, the meter indicates the value of
a. plate supply voltage for V4.
b. plate voltage for V4.
c. plate current for V4.
d. tube current for V4.
CHECK YOUR ANSWERS WITH LESSON SOLUTION SHEET #3, PAGES 43 AND 44.