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More than Circuit EngineeringEspionage. Non contact output of information from a telephone line
Схемы >> Espionage >> Espionage. Non contact output of information from a telephone lineEspionage. Non contact output of information from a telephone line
The device registers the changes of electromagnetic field round a telephone wires. For the no contact output of information from a telephone line a telephone pair of wires is stopped up near the core of the choke L1. A signal from an amplifier gets on the microphone input or on a telephone percussion cap. Supply voltage is 1.2 – 3 V. A choke L1 has 600 coils of the wire ПЭВ 0.05.
Circuit of non contact output of information from a telephone line
Literature: Magazine Радиохобби №3 1999.
added 26.01.08 22:19:49 | 
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