Liquid Transmitter

158

00:36:46

The Telephone Museum of New Mexico had some models of "Liquid Transmitter" that Alexander Graham Bell and Mr. Watson used for first telephone call.  Wire from Battery negative terminal connects to brass rod suspended in small tank of conductive liquid. The "T' looking thing at top is membrane that vibrates from sound. downward part  of "T" is wire suspended just above conductive liquid in liquid holding cup  connections at right go to computer amplifier speakers to  increase sound.  Critical is wire height attached to membrane above conductive liquid.  

A DIY build and demo of this at:  

http://www.pcbheaven.com/opendir/index.php?show=893jc3780gm0e99d60e  

published 9 years ago

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