Mounting Instructions - McIntosh C20 Instruction Manual

MOUNTING
INSTRUCTIONS
(Serial No.
6L001 and
Later)
Your C-20
Stereo
Prearnplifier rnay
be rnounted
in
a
cabinet
of your
own,
in the
Mclntosh
Cabinet Model
L-66, ot
on
a
rack
panel.
MOUNTING IN YOUR
OWN CABINET.
This prearnplifier has been designed to mount on a shelf or from
the
front
panel
if
the
panel
thickness is 3/8" or rnore. It is
suggested
that the instructions be read through
com-
pletely before starting the installation.
Enclosed
in the Instruction Manual envelope are two copies of the "WOODEN PANEL
CUTOUT TEMPLATE"
and two copies
of
the "SHELF CUTOUT TEMPLATE'| for
mounting
the
C-20.
Prepare the cabinet for
the mounting by
first cutting
the wooden
panel
to receive the pre-
arnplif
ie
r
.
l.
On
the
back of the
wooden
cabinet panel make a
vertical center line
on
the
exact
center
of
the
area
in which the preamplifier will
rnount.
In the
parts
bag
that was packed
with
the
prearnplifier there are
two
metal
mounting
striPs
l/2" wide and 3 I12" Long.
The
"WOODEN
PANEL CUTOUT TEMPLATE" shows
how
the
rnounting
strip is
used
as a measuring guide
to locate
the
two "LOCATION
HOLES.
''
Z. Take the rnounting
strip and with
a
pencil mark one length
13
LlT"l both to the right
and
to the left of the vertical center line, approxirnately
one rnounting
strip length
above the
sheIf.
Rest the end of the rnornting strip on the shelf
and
mark
one
length (3 l'2"1 vertically.
Where these
rnarks intersect is the position of the "LOCATION
HOLES. "
3. Drill these two holes with a 3/16" drill
being
careful to
hold the
drill as nearly per-
pendicular as possible so as not to transfer
any
error in location of
the holes
to the front
of
the cabinet.
4. Transfer the
"WOODEN
PANEL CUTOUT TEMPLATE" to the front of the
wooden
cabinet panel. Match the "LOCATION HOLES'| for the ploper positioning of the
template.
Caref
ully drill the
s
ix
3
I
I6" rnounting
hole
s
.
5. Cutout the openingin the cabinet keep-
irg within the
line
s
. If the
s
aw
doe
s
not
quite
reach the
line
s, finish the
opening
with a file
or coarse
sandpaper.
6
.
Us
ing two
f
lathe
ad rnachine
s c
re
ws
fasten the two mounting strips on
the back of
the cabinet panel so
that the
edge
of
the
mount-
irg strip is flush with the
edge
of
the
cabinet
hole, and that the rnounting
hole
s
coincide
with
the mounting
s
trip
nuts
. Two lengths
of
s c
rews
are provided
f
or
diffe
rent cabinet
pan-
eI thicknesse. (Flathead 6-32 x LlZ"
and
6-32 x I Ll4"l.
IMPORTANT: The heads of the
two
flat-
he
ad rnachine
s c
re
ws holding the
rnounting
strips in place rnust be flush with
the
front
s
urface of the cabinet. If the
s
crews
will
not
p
ull into the
wood
, a
s
light
c
ounte r
s
ink with
an
oversize
drill rnay be necessary.
,@
#
6-32
FLATHEAD
MACHINE
SCREW
/#'
d
Ik
UNTING
STRI P
SPRING
CLI PS
CABINET
PANEL
CUTOUT
-5-
MOUNTING HOLES