!! 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 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
(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
"@ j¤ø >>c<<—-/\/\/\/\—-+—–+——-
2 \ \ \
\ \ \
v >>e<<
8 —–/\/\/\–
\
3
>>f<<———–+
/—\
1 ( \ )
( /
/-)—->>d<<
( \ > )
( —– )
( \ )
\—/
\
\
>>e<<——-
\
(
)
(
\
——>>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
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
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