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[
The Pearl Box:Definition - This is a box that may substitute for many =
boxes
which produce tones in herts. The Pearl Box when operated correctly can =
pro-
duce tones from 1-9999hz. As you can see, 2600, 1633, 1336 and other =
crucial
tones are obviously in its sound spectrum.

Materials you will need in order to build The Pearl Box:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
C1, C2::::::::.5mf or .5uf ceramic disk capacitors
Q1::::::::::::NPN transistor (2N2222 works best)
S1::::::::::::Normally open momentary SPST switch
S2::::::::::::SPST toggle switch
B1::::::::::::Standard 9-Volt battery
R1::::::::::::Single turn, 50k potentiometer
R2::::::::::::  "     "    100k potentiometer
[R3::::::::::::  "     "    500k potentiometer
R4::::::::::::  "     "    1meg potentiometer
SPKR::::::::::Standard 8-ohm speaker
T1::::::::::::Mini transformer (8-ohm works best)
Misc.:::::::::Wire, solder, soldering iron, PC board or perfboard, box =
to
         contain the completed unit, battery clip

Instructions for building The Pearl Box:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Since the instruction are EXTREMELY diffucult to explain in words, you =
will be
given a schematic instead. It will be quite diffucult to follow but try =
it any
way. There is also a Hi-Res picture you can get that shows the schematic =
in
great detail.

[                         (Schematic for The Pearl Box)

                +-------------+------------+---------+
                !             !             \        +--S1----
                C1            C2             \           SPKR
                !             !               +      +--------
                +             +           ----+T1    +
                !\            +---------------+------+
                !  b  c-------!
                !   Q1                   !
                !     e-----S2---+       !
                !                !       !
                !               B1       !
                !                !       !
                !                +-------+
[                !R1   R2   R3   R4!
                /\/\ /\/\ /\/\ /\/\
                  +--+ +--+ +--+

Now that you are probably thourghly confused, let me explain a few minor =
de-
tails. The potentiometer area is rigged so that the left pole is =
connected to
the center pole of the potentiometer next to it. The middle terminal of =
T1 is
connected to the peice of wire that runs down to the end of the battery.

Correct operation of The Pearl Box:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
You may want to get some dry-transfer decals at Radio Shack to make this =
job
alot easier. Also, some knobs for the tops of the potentiometers may be =
useful
too. Use the decals to calibrate the knobs.
R1 is the knob for the ones place, R2 is for the tens place, R3 if for =
the
[hundreds place and R4 is for the thousands place. S1 is for producing =
the all
the tones and S2 is for power.
Step 1: Turn on the power and adjust the knobs for the desired tone.
       (Example: For 2600 hz- R1=3D0:R2=3D0:R3=3D6:R4=3D2)
Step 2: Hit the pushbutton switch and VWALA! You have the tone. If you =
don't
  have a tone recheck all connections and schematic.=20


     =20
=1A