6. b--para 40b
Upper frequency limit = 2 x 20.852 MHz - 41.704 MHz
Center frequency = 2 x 20.850 MHz = 41.700 MHz
Frequency deviation = 41.704 MHz = 41.700 MHz
= 0.004 MHz, or 4 kHz
7. a--para 40c(2), (3), (4)
8. c--para 41b(4)
The power amplifier of a low-level AM transmitter must provide
linear
amplification which in this case is about 25 percent efficient
whereas the power amplifier of an FM transmitter may be
operated at the more efficient class C.
Since the plate efficiency of a class C
amplifier is from 60 percent to 80 percent,
Power out1 = 0.60 x 225 watts - 135 watts
Power out2 - 0.80 x 225 watts = 180 watts
9. a--para 41d
10. d--para 41f(3)
11. c--para 41e
12. d--para 41g(10)
13. b--para 41g(2)
14. d--para 41f(l), (2)
The output capacitance of an unneutralized push-pull amplifier is one-half
the output capacitance of one tube. The output capacitance of a neutralized push-
pull amplifier is one-half the output capacitance of one tube plus twice the grid-
plate capacitance. Hence,
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