Telephone transmission line

236

01:42:41

Ever since I heard of wire telephone I wanted to build one. This is a simple version with some amplification provided by transformers. If I could figure out how to make a carbon mike that produced AC it would work much better.
http://gizmodo.com/barbed-wire-fences-were-an-early-diy-telephone-network-1493157700

published 10 years ago

faceblast

10 years ago

any cone speaker will act as an AC microphone

rich11292000

10 years ago

Is the main run 1 wire or 2?

Karlberg

10 years ago

The main would be two lines (positive & negative) but one could be run through ground. For a full set you'll need three lines ; common negative/ground and one positive for each carrier.

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