LESSON SOLUTIONS
SIGNAL SUBCOURSE 321......................AM Radio Transmitters
LESSON 1..................................CW Radio Transmitters
All references are to TM 11-665.
1. b--para 3a
2. a--para 3e, chart in para 3d
The wavelength of 3,000 meters is equivalent to 100 kHz:
F = 300,000,000/3,000 = 100,000 Hz or 100 kHz.
The wavelength of 4,500 meters is equivalent to 66.7 kHz:
F = 300,000,000/4,500 = 66.7 kHz.
The frequency range of 66.7 to 100 kHz is within the low frequency (LF) band.
3. b--para 53a
4. b--para 55c
5. c--para 55d(1), fig.
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If a sufficient number of stages is used, the CW transmitter can be arranged to
operate on 10 MHz, 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz, since each doubler
simply doubles the frequency of the preceding stage.
The transmitter cannot be
operated on 50 MHz, 60 MHz, or 100 MHz because the stages in the transmitter are
either fundamental frequency amplifiers or doublers.
6. a--para 56a
7. b--para 56a, d
8. b--para 56c(2)
321 S
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