Intercom


Posted on Sep 9, 2012

The circuit provides a minimum component intercom. With switch SI in the talk position, the speaker of the master station acts as the microphone with the aid of step-up transformer Tl. A turns ratio of 25 and a device gain of 50 allows a maximum loop gain of 1250. Rv provides a common mode volume control


Intercom
Click here to download the full size of the above Circuit.

Switching Si to the listen position reverses the role of the master and remote speakers.




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