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Essential warnings and precautions for safe operation of the transceiver.
Technical details covering general, transmitter, and receiver specifications of the ARU 251.
Instructions for local control and repeater operations.
Detailed explanation of each control's function and adjustment.
Explains the oscillator, modulator, multipliers, and power amplifier stages.
Details power controls, receiver RF, oscillator, IF stages, squelch, and audio paths.
Procedures for aligning power supply and transmitter parameters.
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General