How to Build a Hydrophone
Page 8

Feed the other ends of the two insulated #24 wires through the cover of the phone plug.

Connect the signal insulated #24 wire (white) to the smaller piece of the phone plug (white to phone plug), by feeding it through the little hole in the phone plug and twisting.

Connect the ground wire (orange) to the longer piece of the phone plug (orange to phone plug).


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