Repeater Station Microphone Pre-Amplifier from Mexico
A low-noise pre-amplifier circuit board for microphone signals in analog telephone repeater stations. It provides initial gain before main repeater amplification stages, serving as a part of audio-frequency electric amplifiers.
Duty Rate — Mexico → Canada
0%
Import Tips
• Classify this board as a part of an audio-frequency electric amplifier, not as a standalone pre-amplifier
• Provide evidence of its use in repeater stations
• Check if the board is a printed circuit assembly, which may affect classification