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Text File  |  1992-09-26  |  4KB  |  82 lines
  1.  
  2.                                 ==Phrack Inc.==
  3.                     Volume One, Issue Three, Phile #7 of 10
  4.  
  5.         ***************************************************************
  6.         *                                                             *
  7.         *               Electronic Eavesdropper                       *
  8.         *                                                             *
  9.         *               by                                            *
  10.         *                                                             *
  11.         *               Circle Lord                                   *
  12.         *                                                             *
  13.         ***************************************************************
  14.  
  15.  
  16.      Have you ever considered buying one of those hi powered microphones often
  17. seen in eletronics magazines, but thought it was to much to buy and to small to
  18. card?   The circuit shown in this file will provide you with the information to
  19. build one for a lot less money.
  20.      These audio eavesdropping devices are probably one of the hottest items in
  21. the underground due to their ability to pick up voices through thick walls.
  22. You can also attach the speaker wires to a tape recorder and save all the
  23. conversation.   As one can see these are great for blackmailing a teacher,
  24. classmate, principal, neighbor, or whoever you seek services from...
  25.  
  26.  
  27.  
  28. Parts list:
  29.  
  30. -=EM--------------------------
  31. M1    Amplifier Module. (Lafayette 99C9037 or equiv.)
  32. M2    9-VDC battery.
  33. M3    Microphone
  34. R1    20K poteniometer with spst switch.
  35. S1    Spst switch on R1
  36. SP1   8-ohm speaker
  37. T1    Audio transformer (Radio Crap part # 273-1380)
  38.  
  39.  
  40.  
  41.                         Schematics
  42.                         +------+--------M1
  43.                         1      1        1
  44.                         1      1red     1blu
  45.                         1      1        1
  46.                         1      transformer
  47.                         1      1        1
  48.                         1      1yel     1grn
  49.                         +------+        1
  50.                                1  +-----+      +-----+
  51.                                1  1            1     1
  52.                               b1 b1 r+M2+b o+S1+o    1
  53.                               l1 l1 e1  1l r1  1r    1
  54.                               k1 u1 d1  1k g1  1g    1
  55.                             **********************   1
  56.                            *                yel>*-+  ++
  57.                            *                    * R   1
  58.                            *         M1         * 1-+ 1
  59.                            *                red>*-+ 1 1
  60.                            *                    *   1<<
  61.                            **********************   1
  62.                              b1   1g    y1          1
  63.                              l1   1r    e1          1
  64.                              k1   1y    l1          1
  65.                               1   1      +----------+
  66.                               +SP1+
  67.  
  68.  
  69. S1 here is on the potentiometer
  70. M3 can be an earphone earpiece
  71.  
  72.  
  73.  
  74.  
  75.                                ----          /
  76.                               /             /
  77.                              /             /
  78.                             /    ircle    /    ord
  79.                             ----          ----
  80. 
  81. Downloaded From P-80 International Information Systems 304-744-2253 12yrs+
  82.