Telephone wire tapping
This very simple circuit can be
listen to what people on telephone talk. Just connect it to your phone
wire (line). The line has 4 wires,
but only 2 of then are interesting. In the flat cable they are in the middle:
the green and the red. The telephone wire tapping circuit
is connected to those two wires (polarity does not matter). Values of
components are not critical at all, you can use
twice more or twice less the value. Transistor is for example BC547, BC548,
KC507, KC508, BC237 or BC238. The power supply is a 9-Volt battery.
It is illegal to connect any device that is not approved, especially wire
listening devices, to the telephone network!!
This article is intended only to draw attention to
the potencial danger of being telephone wire tapped. I do not encourage anybody to build or even use
this device! I do not take any responsibility for any
material or immaterial damage, which may be causes by the device.
Its use creates the risk of legal sanctions.
The telephone line may contain hazardous voltages.
Everything you do at your own risk.
Telephone wire tapping circuit schematic.