Radio Listens In On Phone Calls (Jul, 1936)
Filed under: Radio — @ 10:24 am
Source: Modern Mechanix ( More articles from this issue )
Issue: Jul, 1936
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Source: Modern Mechanix ( More articles from this issue )
Issue: Jul, 1936
| Buy on Ebay
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.
