Local Oscillator

TM-11-5826-225-35 Direction Finder Set AN/ARN-83 Manual
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TM 11-5826-225-35

111. Local Oscillator

113. IF Amplifiers

a. First and Second IF Amplifiers (fig. 15).

112. Mixer

(fig. 5-7)

b. Third, Fourth, and Fifth IF Amplifiers

(fig. 5-8). The circuitry of IF amplifiers Q9,

Q10, and Qll is similar to the first and second

IF amplifiers, with the exception that amplifier

gain is fixed with emitter and base bias volt-

ages and cannot be controlled automatically

or manually. After the 142.5-kc signal has been

amplified in the second IF amplifier, it is

further amplified by Q9, Q10, and Qll, and

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Index