increase in capacitance = 2 x (grid-plate capacitance)
= 2 (14.5 pf)
= 29 pf.
15. c--para 41h(4)
Load impedance = QL x XL1
= 10 x 1,500
= 15,000 ohms, or 15K
16. c--Attached Memorandum, para 3-2a
17. b--Attached Memorandum, para 3-2c
To produce an output of 10 MHz with a 2.5-MHz input, the collector
circuit must be tuned to the fourth harmonic
.
Therefore, the
approximate efficiency
18. c--Attached Memorandum, para 3-2
19. c--Attached Memorandum, para 3-5b(2)
20. d--Attached Memorandum, para 3-6a
LESSON 4..................................FM Transmitters
All references are to TM 11-668, unless otherwise indicated.
1. a--para 42b
2. d--para 43b
3. c--para 43d(1)
Using a single cathode would short the output load circuit.
When the
frequency varies from the center frequency in a discriminator, a potential
difference must appear between the two cathodes to obtain an output voltage that is
proportional to the frequency change.
4. c--para 43d(2)
5. b--para 45b(1)
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