!! 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 ************ CAR TRACKER ************* Uploaded By: The Phoney Phoner And The Skeleton Krew ************************************** By: Ford Prefect "my name is bond, james bond." My next gadget is what is called a bumpbeeper. It attaches to the under side of a car with magnets and then sends out a signal that can be heard on a radio. Parts list: () = diagram # (1) 2n635a transistor (2) 4.3K 1/2 watt resistor (3) 1 meg potentiometer (4) 10k 1/2 watt resistor (5) 50pf capacitor (6) 365pf variable capacitor (7) .005Uf capacitor (8) .01Uf capacitor (9) ferrite loopstick (from a crys- (10) coil [see text] tal radio) (11) single-pole single-throw switch (12) 9 volt battery (opt.) Battery clip & case (13) antenna this device is a constant tone signal- ling source that can be tuned to any clear spot below 1000 khz. If magnets are attached to the case, it can quick- ly be installed under the persons car. (9) Is a standard ferrite loopstick tha t can be purchased at radio shack. (10) Is simply 12 turns of plastic cov- ered hookup wire wound over (9). 13 (*)-------\(----+-----______--- >>a<< \ \ ^^^^^^ \ 5 \ \ 9 --- -\(-- --\(--->>b<< - 6 \ 7 v \ --->>a<< >>a<<------+------+------o/ o----- \ \ 11 \ / --- \ \ - \ / v \ 4 \ -------- \ \ \ --[][]->>c<< --->>b<< 12 >>c<<----/\/\/\/\----+-----+------- 2 \ \ \ \ \ \ >>d<<---)\------- \ \ v >>e<< 8 -----/\/\/\-- \ 3 >>f<<-----------+ /---\ 1 ( \ ) ( / /-)---->>d<< ( \ > ) ( ----- ) ( \ ) \---/ \ \ >>b<< >>e<<------- \ ( ) ( 10 ) \ ------>>f<< >>d<<--- \ --- - v (ground) to tune the transmitter: 1)pick an empty spot on the am car radio below 1000 khz. 2)Switch on the transmitter with the spst switch. 3)Tune the 365 variable capacitor slowly until a shrill note can be heard from the car radio. 4)The pitch of the note is adjustable by turning the 1 meg potentiometer resistantly, Ford Prefect Uploaded to: The Party Line (415) 447-0963