!! THE BUG DETECTOR !! BY: FORD PREFECT UPLOADED BY: The Phoney Phoner and The Skeleton Krew What you will need: (the number in brackets is a reference number which matches the schematic. The number in paranthesise is the amount of the part needed.) [1] (1) 1n34a crystal diode [2] (2) 2n107 audio transistors (ge-2 or equivalent) [3] (1) 3k ohm variable resistor [4] (2) 560 ohm 1/2 watt resistor [5] (1) 15k ohm variable resistor [6] (1) 500 ohm variable resistor [7] (1) .002 Uf capacitor [8] (1) 1.5 Volt aa battery [9] (1) aa battery holder [10] (1) 0-300 microammeter (lafayette 99-g-5028 or equivalent) [11] (1) 10 millihenry choke (ohmite z-50) [12] (1) single-pole single-throw (spst) toggle switch [13] (1) project box (radio shack) [14] (1) antenna (either from an old transistor radio or a stiff piece of wire will also work) [15] (1) 2000 ohm headset (or a mini- ature earphone like most tv and radios use) the parts can be purchased from radio shack for less than $20. This is a very good high-gain meter-type bug detector. It has a crystal diode with 2 amplification stages to boost the power of the meter. This produces a broad-band, battery-powered, receiver that can sense radio-frequency transm- itters up to a mile away. Unfortun- ately, it will also pick up a commerc- ial am or fm station up to 3 miles away.... Bug detector schematics: [14] [1] (*)-----+------\<---+------+----\ \ \ \ \ \ \ \ \ \ \ \-/ ( / [7] \ \ v ) [3] \ --- \ [11] ( / ^^^ \ [0] ) --> \ \ \ \ \ / \ \ \ \ \ \-/ \ \-/ \ \ v \ v ----+ \ \ [0] \ [0] \ \ \-/ \ v \ \ [0] \ \ \ --------------------------------------- \ /----\ \ ( /--)-----------\ --->>b<< \ ( \/ ) \ \ ------(---\ ) \ \ ( \\ ) ----+---\ ( <--)-----\ \ \ [2] \----/ \ \ \ \ \ \ \ / \ [0] \-/ \ \ v / \ [4] \ \ / \ \ \ \ \ >>a<< \ \ \ --------------------------------------- \ \ [12] [8&9] \ ____ <-><+> \ / \ ---------() ()-----\ \---->>c<< \ [4] >>a<<--------\/\/\/\/\----->>c<< ---------------->>d<< \ [2] /---\-----\ ( \ ) ( \-\ ) >>c<<----(---\ \-----)----\ ( \-->-\ ) \ ( ) \ \---------/ \ [0] \-/ v [5] >>b<<-------\/\/\/\/\--- ^ \ \ ------------>>d<< [6] >>d<<-------/\/\/\/\/-- ^ \ \ Uploaded to: The Party Line (415) 447 - 0963