Graymark 803 - INTRODUCTION; TOOL REQUIREMENT

INTRODUCTION
Your
model
803
is
specially
designed
for
applications requiring
a
low
voltage
DC
power
source. lt
provides
a continuously
variable
output
of
0-15 Vdc
at up
to
300mA
of current
at
full
load.
lt is ideal
for
use as a
battery
eliminator
for
tr"ansistor radios,
amplifiers,
oscillators,
etc. or
you
may
use it as
a convenient
voltage
source
for
designing,
experimenting,
repairing
and
testing low
voltage
semiconductor
devices and
circu its.
Your Power
Supply is
constructed in
three
PHASES,
which will
allow
you
to
experience
many fascinating
and meaningful
experiments
and will
give you
a
solid foundation
in voltage rectif
ication
and
power
supply
design.
PHASE I
consists of constructing
the unit
in
a breadboard
form.
Breadboarding
is
a common
technique
used by electronic
engineers
and
technicians in
industry.
By using
this technique,
you
achieve
an over-all
assembly
of the
circuit, which
demonstrates
the
inter-relationship
of
components
as well as
gives you
easy
access for
circuit testing.
Thus,
the construction
and testing
of PHASE
I enables
you
to understand
the HOW
and WHY
of the
unit's
circuitry. If
you
are
constructing
this
proiect
without
the supervision
of
an
instructor,
you
may
omit
PHASE
I
and
go
directly
to PHASE ll.
PHASE
ll is, industrially
speaking,
the assembly
operation.
This
phase
is
con-
cerned
with arranging
the
components
and fittings
onto
the chassis.
This
phase
will
provide
you
with
experiences
such
as, component identif
ication,
component
mounting,
solder techniques,
lead
dress, and final
assembly into
the
plastic
cabinet.
PHASE
lll
provides
you
with
Operation
tnstructions,
Product
Specif
ications,
Learning
Experience and
Skill
Development
Review,
and Review
Evaluation.
At
the back of
this book is
a section
on servicing
and
parts
replacement,
which
gives
a
Service Flow
Chart
for
your
use in
troubleshooting
problems
and
gives
information
on
ordering replacement parts
and
on
f
actory
servicing.
You
are now ready
to start constructing your power
supply.
Follow
the in-
structions
closely
and
you
will
have
a
worthwhile project,
one
that
you
can be
proud
of
and one that
you
will enjoy
assembling.
TOOL
REOUIREMENT
lllustrated
below
are the tools necessary
to assemble
your project.
Additional
tools,
such
as nut
drivers,
pliers,
and soldering
aids,
make
circuit assembly
easier, but are not
required.
WIRE
STRIPPER
SCREWDRIVERS,
PHILLIPS
HEAD
1-LARGE
SCREWDRIVERS, 1
-
Ta" BLADE
1
-V8"
BLADE
DIAGONAL
CUTTERS
GRAYMARK
INTERNATIONAL,
INC.
SUBSIDIARY
OF
BUCK
ENGINEERINC
CO.
INC.
2
P/N
61S4U
rc
All
righa
reserued. This book ot
patts
thereol may not be reproduced
in
any torm without violating
the copyright law. Printed in U.S.A.
LONG NOSE PLIERS