| ==Phrack Inc.== | |
| Volume One, Issue Three, Phile 7 of 10 | |
| *************************************************************** | |
| * * | |
| * Electronic Eavesdropper * | |
| * * | |
| * by * | |
| * * | |
| * Circle Lord * | |
| * * | |
| *************************************************************** | |
| 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... | |
| Parts list: | |
| -=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) | |
| 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+ | |
| S1 here is on the potentiometer | |
| M3 can be an earphone earpiece | |
| ---- / | |
| / / | |
| / / | |
| / ircle / ord | |
| ---- ---- | |