| ==Phrack Inc.== |
| Volume One, Issue Three, Phile 7 of 10 |
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| *************************************************************** |
| * * |
| * Electronic Eavesdropper * |
| * * |
| * by * |
| * * |
| * Circle Lord * |
| * * |
| *************************************************************** |
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| Have you ever considered buying one of those hi powered microphones often |
| seen in eletronics magazines, but thought it was to much to buy and to small to |
| card? The circuit shown in this file will provide you with the information to |
| build one for a lot less money. |
| These audio eavesdropping devices are probably one of the hottest items in |
| the underground due to their ability to pick up voices through thick walls. |
| You can also attach the speaker wires to a tape recorder and save all the |
| conversation. As one can see these are great for blackmailing a teacher, |
| classmate, principal, neighbor, or whoever you seek services from... |
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| Parts list: |
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| -=EM-------------------------- |
| M1 Amplifier Module. (Lafayette 99C9037 or equiv.) |
| M2 9-VDC battery. |
| M3 Microphone |
| R1 20K poteniometer with spst switch. |
| S1 Spst switch on R1 |
| SP1 8-ohm speaker |
| T1 Audio transformer (Radio Crap part 273-1380) |
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| Schematics |
| +------+--------M1 |
| 1 1 1 |
| 1 1red 1blu |
| 1 1 1 |
| 1 transformer |
| 1 1 1 |
| 1 1yel 1grn |
| +------+ 1 |
| 1 +-----+ +-----+ |
| 1 1 1 1 |
| b1 b1 r+M2+b o+S1+o 1 |
| l1 l1 e1 1l r1 1r 1 |
| k1 u1 d1 1k g1 1g 1 |
| ********************** 1 |
| * yel>*-+ ++ |
| * * R 1 |
| * M1 * 1-+ 1 |
| * red>*-+ 1 1 |
| * * 1<< |
| ********************** 1 |
| b1 1g y1 1 |
| l1 1r e1 1 |
| k1 1y l1 1 |
| 1 1 +----------+ |
| +SP1+ |
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| S1 here is on the potentiometer |
| M3 can be an earphone earpiece |
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| ---- / |
| / / |
| / / |
| / ircle / ord |
| ---- ---- |
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