MIXER AND BUFFER AMPLIFIER A1400.

TM 11-5820-401-34-3/0967-LP-432-3060

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MIXER AND BUFFER AMPLIFIER A1400.

MIXER V1401

Mixer V1401 is the last of three vacuum tubes in the receiver. During reception it accepts the following

inputs:

1. Amplified fm rf from the A1300 module.

2. Rf from the local oscillator 11.5 MHz above or 11.5 MHz below frequency of A1300 input.

The signals applied to the mixer are heterodyned to produce four strong frequencies. One of these,

the 11.5-MHz difference frequency, is applied to the receiver if amplifiers. The 11.5-MHz difference

frequency carries the audio intelligence, and is referred to as the if (intermediate frequency).

BUFFER AMPLIFIER Q1401

The buffer amplifier in the A1400 assembly is not used in the R-442/VRC.

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