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1588B Microphone Preamplifier

 

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1588B Microphone Preamplifier

DESCRIPTION


The 1588B microphone preamplifier features low noise characteristics, high sensitivity and power output and is easily mounted in an octal socket.
The Altec 1588B Microphone Preamplifier is a sealed, plug-in solid-state module with a transformer-isolated input and low noise characteristics. The built-in transformer provides a balanced and isolated input for maximum protection from RF and other stray fields normally induced on low-level microphone lines. The entire unit is encased in mu-metal to provide effective protection from stray magnetic fields, with magnetic shielding of 90 dB for the input transformer. The equivalent input noise is equal to or better than -124 dBm. The gain is variable from 20 dB to amaximum of 33.5 dB by installation of a user selected resistor. Frequency response is ±1 dB from 30 to 20,000 Hz. Input impedance is 200 ohms and is designed to accept signals from source impedances of 150/250 ohms. The output has an internal source impedance of less than 10 ohms and is designed to drive loads of 600 ohms or greater. Operating power can range from +12 VDC to +20 VDC. The 1588B will deliver +9 dBm to a 600 ohm load when operated at +12 VDC and will deliver +14 dBm to a 600 ohm load when operated at +20 VDC. The total harmonic distortion (THD) is less than 1% within a frequency range of 30 to 20,000 Hz with a 600 ohm load when operated at + 20 VDC.

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