Eico HF-89 - Page 3

mechanical
installation
GENERAL
a)
HEAT
DISSIPATION
(VENTILATION):
In
common
with
other
electronic
equipment,
the
Model
HF-89
pro-
duces
a
great
deal of
heat in
normal
operation.
Unless
continuous
and
adequate
air
flow
is
obtained
around
the
heat
producing
elements,
these
elements
will
overheat
and
their
useful
life
will
be
greatly
curtailed.
Adequate
ventilation
will
be
provided
if
the
amplifier
is
installed
in
an
open-back
console
provided
that
the
top
of
the
amplifier
is
spaced
at
least
two
inches
below
any
shelf
mounted
above
it.
If
the
cabinet is
enclosed
at
the
rear,
provide
several
large
holes
or
slots
as
low
down
and
as
high up
in
the
cabinet
back
as
possible.
As
an
alternate,
holes
may
be
provided
in
the
sides,
bottom,
or top
of
the
cabinet.
The
important
thing
to
remember
is
that
effec-
tive
ventilation
requires
provision
for
coolairto
enter
at
the
bottom
and
to
leave
at
the
top.
If
the
amplifier
is not
installed
in
a
console,
it
should
be
situated
preferably
on
an
open
surface.
An
attractively
finished
matching
cover
for
the
Model
HF-89is
available,
which
will
provide
a
"finished"
appearance
as
well
as
protection
when
the
amplifier
is
not
installed
in
a
console.
Four
rubber
feet
are
also
provided
so
that
the
amplifier
will
not
marthe
surface
of
fumitureon
which
it is
placed.
b)
ACCESSIBILITY
TO
PARTS:
Tubes
are
the
most
fre-
quently
replaced
items
in
electronic
equipment.
If the
amplifier
is
placed
in
a
console,
sufficient
space
should
be
allotted
to
reach
and
remove
any
tube in
the
amplifier.
Furthermore,
input
and
output
terminals
of the
amplifier
should
be
accessible
to
permit
easy
interchanging
of
sys-
tem
components
for
comparison.
If
antennas
are
strung
around
the
back
of
the
console
in
which
the
amplifier
is
installed,
arrange
them
so
they
will
not
interfere.
c)
ELECTRICAL
ISOLATION:
To
realize
the
full
benefit
of
having
a
power
amplifier
physically
separate
from
the
preamplifier-control
unit
and/or
tuner,
the
power
ampli-
fier
should
be
placed
at leastone
foot
away
(more
if pos-
sible)
from
either
or
both
of
these
units.
d)
ACOUSTICAL
ISOLATION:
If
amplifier
and
speaker
are
installed
in
the
same
cabinet,
provide
sufficient
sep-
aration
to
minimize
mechanical
speaker
vibration
reaching
the
amplifier.
The
minimum
separation
is
about one
foot.
CONSOLE
MOUNTING
Having
determined
a
proper
location
for the
amplifier in
the
particular
console,
the
correct
procedure
for mounting
the
amplifier
chassis
is
as
follows:
a) If
the
rubber
feet
have
been
inserted
in
the
bottom
plate,
remove
them
(pry out
with
a
thin
screwdriver),
b)
Remove
the
10
screws
which
fasten
the
bottom
plate
to
the
chassis, c)
Place
the
bottom
plate
(bumps
facing up)
at
the
location
on
the
shelf
or
the
other
mounting
surface
in
which
it is
desired
to
mount
the
amplifier.
With
a
sharp
pencil,
placed
withits
point
directly
against
the
edge
of the
lower
surface
of
the
bottom
plate,
draw
the
outline
of the
bottom
plate
on
the
shelf
and
also
mark
the
position
of the
two
extreme
holes
on
both
the
long
sides
(front &
rear),
d) Re-
move
the
bottom
plate
and
drill
each
of
the
marked
holes
onthe
shelf
to
adiameterof
1/4".
e)
Refasten
the
bottom
plate
to the
chassis,
withthesix
#
8x 3/8
screws
previously
removed,
using
the
center
holes
on
each
of the
long
sides
and
the
two
holes
on
each
of the
short
sides,
f)
Replace
the
chassis
on
the
shelf,
positioning
it
exactly
in
the
outline
previously
drawn,
g)
From
the
bottom
side
of
the
shelf,
insert
a
#8
x
1“
screw
with
a l/2"
flat
washer
against
the
head
through
each
of
the
four
front
and
rear
holes.
These
screws
engage
the
stamped
nut
over
each
hole
on
the
chassis
flange
and
when
tightened
secure
the
chassis
to
the
shelf.
electrical
installation
POWER
a)
POWER
REQUIREMENTS:
The
EICO
Model
HF-89
re-
quires
21 5
watts
at
no
signal,
270watts
at
100
watts
out.
b)
REMOTE
SWITCHING:
The
EICO
Model
HF-89
is
provided
with
its
own
ON-OFF
power
switch.
If
the
HF-89
power
amplifier
is
being
used
with
a
preamplifier,
such
as
the
EICO
HF-85,
or
a
self-powered
tuner-pre-
amplifier,
the
line
cord
of the
HF-89
is
inserted
in
a
switched
117VAC
convenience
outlet
in
the
control
unit.
Turn
the
power
switch
on
the HF-89
to
ON.
Note:
When
using
a
self-powered
preamplifier-control
unit,
touch
one
end
of a
wire
to
the
preamplifier
chassis
and
theother
end
to
the
power
amplifier
chassis.
If
a
spark
occurs,
pull
out
the
HF-89
line
cord
plug
and
re-insert
it
with
the
prongs
reversed.
c)
CONVENIENCE
OUTLETS:
When
the
HF-89
is
used
with
a
preamplifier,
such
as
the
EICO
HF-85,
normally
the
convenience
outlets
on
the
preamplifier
will
be
used.
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