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--------- 
PEARL BOX 
---------



------------ 
Introduction 
------------

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



--------- 
Materials 
---------

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 
------------

Since the instruction  are  EXTREMELY  difficult  to  explain  in
words,  you  will  be given a schematic instead. It will be quite
difficult 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  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 piece
of wire that runs down to the end of the battery.



----- 
Usage 
-----

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 for the desired tone.
        (Example: For 2600 hz- R1=0:R2=0:R3=6:R4=2)

Step 2: Hit the pushbutton switch and VWALA! You have  the  tone.
        If you don't have a tone recheck all connections and 
        schematic.


+++EOF