Simple external microphone. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Simple external microphone. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Microphones, radio microphones

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An external microphone can be used for audio monitoring of premises (and any other places) via wires at a distance of up to 100 meters.

The monitoring room contains a microphone and a preamplifier. From the controlled room, the signal goes through the wires to the ultrasonic frequency converter and the power source.

The scheme does not need to be configured. The cable is better to use shielded, but you can just twisted.

See other articles Section Microphones, radio microphones.

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