Radio Listens In On Phone Calls (Jul, 1936)

Radio Listens In On Phone Calls
AN ELECTRICAL eavesdropper, the invention of a Washington, D. C, man, Samuel S. Hixon, permits the listening in on phone conversations without connecting to the line. The device, operating on the radio principle, is capable of picking up conversation from phone wires within a radius of twenty-five feet without tapping lines.

1 comment
Submit comment

You must be logged in to post a comment.