BUFFER AMPLIFIER MODULE A6400 AND REGULATOR ASSEMBLY.

TM 11-5820-670-30

1-40. MASTER OSCILLATOR A6300. (CONT)

The capacitance diodes are reverse-biased at 6.3 vdc. Any change in bias causes the effective ca-

pacitance of the diodes to change. The correcting voltages applied to the diodes alter the capacitance

which changes the effective capacitance in the tuning circuits. This change in the tuning circuits

changes the master oscillator operating frequency.

The diodes also accept voice signals and 150 Hz tone signals. These signals alter the capacitance of

the diodes and tuning circuits, producing frequency modulation of the master oscillator frequency.

MASTER OSCILLATOR

The master oscillator is a pnp transistor designed into a modified colpitts configuration. Its operating

frequency range, 30 MHz - 75.95 MHz, is the receiver-transmitter operating frequency range.

Fm signals from the master oscillator are applied to buffer amp A6400.

1-41. BUFFER AMPLIFIER MODULE A6400 AND REGULATOR ASSEMBLY.

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