Heathkit HW-9 User Manual

Page
44
—
Heathkit
NOTE:
Many
of the ICs
used in
this kit
are
CMOS
(complementary
metal-oxide
semiconductor)
de-
vices.
These
are rugged
and
reliable
components
when
they are
installed,
but
they can
be
damaged
by static electricity
during
installation.
The
other ICs
are of
a type that
is not
susceptible
to
static electric-
ity.
Nevertheless,
you should
treat
these
ICs
as if
they
were
CMOS
types, since
it will avoid
all
possi-
ble
confusion
between
ICs and
provide
protection
in all
cases.
Use the
procedure
shown
in Detail
2-8A
whenever
you
are directed
to install
ICs.
(
)
U304: LM324N
integrated
circuit
(#442-602).
(
)
U302: CA3130E
integrated
circuit
(#442-715).
(
)
U301:
MC1349P
integrated
circuit
(#442-55).
(
)
U306: LM388N-3
integrated
circuit
(#442-
763).
Once you
remove a
protected IC
from its
protective
Compare
the
IC to the
drawing
shown
below.
Then
foam packing,
DO
NOT lay the
IC
down or let go
determine
of it until
it is installed
in its socket.
When you
bend
the leads
of a
protected IC,
hold the IC
in one
hand
and place
your other
hand on your
work
surface be-
fore you
touch
the IC to
your work
surface.
This
will
equalize the static
electricity
between the
work
surface and the
IC.
an an
so they do
not line up
with the
holes in the IC
socket.
DO NOT
try to install
an IC without
first
bending
the
pins as
described
below. To do so may
damage
the
IC pins
or the
socket, causing
intermittent
con-
tact.
IC LEADS
Before you install an
IC,
lay
it down
on its side as
shown below and very carefully roll it toward the
pins to bend the lower pins into line. Then turn the
IC over and bend the pins on the other side in the
same manner.
i Bi
SMALL
INDENTATION
NOTCH
DOT
PIN
1
RIDGE
PIN
1
PIN
1
NOTCH
PIN
1
PIN
1
Position
the
pin
1
end
of the IC
over
the index
mark
start
socket.
Make
sure that
all of the
pins
are started
into
the
socket.
Then
push the IC
firmly
into
the
socket.
NOTE:
An IC
pin can
become
bent
under
the IC
and
it will
appear
as though it
is correctly
installed
in
the
socket.
INDEX
MARK
.
•
m
SOCKET
INDEX
MARK
Detail 2-8A

Heathkit HW-9 Specifications

General

Brand	Heathkit
Model	HW-9
Category	Transceiver
Language	English