The Amateur Electrician: Build a telephone

Xlg Amateur Electrician
The Amateur Electrician: Build a telephone using a “Ford Spark coil” Modern Mechanix 1930 – Link.

4 thoughts on “The Amateur Electrician: Build a telephone

  1. It’s not considered good practice to ground things to gas pipes, especially spark coils. (I guess this warning comes 78 years too late)

Comments are closed.

Tagged

current: @adafruit - previous: MAKE, popular science, hackaday, engadget, fallon, braincraft ... howtoons, 2600...

View more articles by Phillip Torrone