119 lines
4.0 KiB
Plaintext
119 lines
4.0 KiB
Plaintext
Unauthorised Access UK 0636-708063 10pm-7am 12oo/24oo
|
|
|
|
This file Presented by METRONET system (301)-944-3023 The bug's that this
|
|
device detects are Infinity transmitters, read the Infinity transmitter
|
|
bulletin for more info.
|
|
|
|
::::::::::::::::::::::::::::::::::::::
|
|
: :
|
|
: How to build a Bug Detector :
|
|
: :
|
|
: by :
|
|
: :
|
|
: The Gremlin :
|
|
: :
|
|
::::::::::::::::::::::::::::::::::::::
|
|
|
|
|
|
|
|
Warning: This formatted for 80 column and upper/lower case capabilities...
|
|
|
|
][][][
|
|
Basic theory
|
|
][][][
|
|
|
|
Because most bugs are triggered through certain frequencies, it is very simple
|
|
to build a small sweeping device that will trigger any bug present. The two
|
|
IC's are what create the oscillating tone. The IC1 operates at .8 Hz where the
|
|
IC2 runs at about 10 Hz. Frequency is determined by this formula:
|
|
|
|
f=1.44/(R1+2R2)C)
|
|
|
|
f measured in Hertz, R in megohms, and C in microfarads
|
|
|
|
The oscillation can be varied by the voltage placed upon pin #5. This is how
|
|
we create the wave sound. When voltage goes up, so does the frequency, and
|
|
vice-versa.
|
|
|
|
Normally, the output pin 3 is a square wave. Since we need varying wave at pin
|
|
#5, we need a triangular wave.We get this through integrating the square wave
|
|
created at pin #3 of IC1. It is acheived by D1, D2, R3, R4 and C2.
|
|
|
|
This varying output is fed into the phone line by transformer T1 which has an 8
|
|
ohm winding going to pin #3 of IC2 and the 500 end to a 0.1 microfarad capaci-
|
|
tator at the phone line.
|
|
|
|
Enuf talk..let's get movin!
|
|
|
|
|
|
][][][
|
|
Schematic Design
|
|
][][][
|
|
|
|
|
|
+9v
|
|
|
|
__________|_____________________________
|
|
| _|__|_ _|__|_ |
|
|
R1 | 4 8 | _|<D1__R3__ | 4 8 | R5
|
|
| | | | | | | |
|
|
+-----+2 3+---+ +-+5 2|--+----+----+
|
|
| | | |_>|R2__R4__| | | | |
|
|
R2 | ic1 | | | ic2 | R6 D3
|
|
| +-+6 | ___| | 6+-+ | V
|
|
| | | | | | | | | -
|
|
+---+-+7 | | +--+3 7+-+-----+----+
|
|
| |___1__| | | |___1__| |
|
|
| | | | | C4
|
|
| | | | | ^
|
|
C1 | C2 T1 _|_._C3|(_. |
|
|
^ | ^ 8--500<_|_. |
|
|
|_________|______________|__|______|__________|
|
|
|
|
|
-G-
|
|
|
|
|
|
][][][
|
|
Parts List
|
|
][][][
|
|
|
|
C1 10-uF electrolytic capacitator 25 WDVC
|
|
C2 300-uF electrolytic capacitator 25 WDVC
|
|
C3 0.1-uF capacitator
|
|
C4 0.068-uF capacitator
|
|
D1-D3 1N914
|
|
IC1,IC2 555 timers
|
|
R1, R4-R6 1-kilohm resistors
|
|
R2 91-kilohm resistor
|
|
R3 22 kilohm resistor
|
|
T1 500-to-8 ohm audio output transformer
|
|
|
|
][][][
|
|
Construction
|
|
------------
|
|
|
|
When building this unit, it is very useful to use a breadboard or vector board.
|
|
I suggest that leads being connected to phone line (T1, C3) end in a jack or a
|
|
modular connector to make the hookup easier. To test it, hook it to the phone
|
|
line (not the suspected line) and call the line you suspect is being bugged.
|
|
The party you are calling should not answer the phone.Now, the unit is
|
|
activated. 3 times, every 4 seconds, the oscillator will go up to 10 kHz and
|
|
back down again..like a bell curve..If there is a frequency sensitive bug on
|
|
the line, the phone will stop ringing, and you will be able to hear everything
|
|
said in the room. If the phone keeps ringing, chances are that all is
|
|
fine..unless the bug requires a multi-frequency trigger..but these are very
|
|
rare..
|
|
|
|
So, we can see that 415-BUG-1111 really does work! It creates the tone..any
|
|
click heard is the Phone Co's (or whoever is bugging) speaker/tape recorder
|
|
picking up!
|
|
|
|
|
|
Have phun, and hope it helped!
|
|
|
|
The Gremlin
|
|
|
|
...call the Gremlin's Lair..201-536-7794..today!...
|
|
|
|
[Thanks again Metronet!]
|