Specifications
BACK
PANEL
CONNECTIONS
Phono
Connections
Either
a record
changer
or
a professional
type
turntable
can
be used.
There
are
three
pairs
of
phono
inputs,
allowing
for use of all
types
of
phonograph
cartridges.
There
is
a
choice of
(1)
low level
magnetic
cartridge,
(2)
high
level
magnetic
cartridge,
or
(3)
crystal
or
ceramic
type.
Most
pop-
ular
magnetic
cartridges
are
of
the
low level type. However,
if
the
cartridge
is
rated
at
more
than
20 millivolts
this
is a
high
level model,
and
the
high
level
magnetic
input
should
be used.
If
you
are
using
a low level
magnetic
cartridge
and
find
that
there
seems to
be
too
much
amplification when
using
it
in
the
low level
phono
input,
then
the
high
level
magnetic
input
may
be used.
This
will reduce
the
total
amplification
without
detriment
to performance. Always
read
instructions
which
accompany
the
cartridge
to
deter-
mine
whether
its
manufacturer
has
any
special recommen-
dations
for
its
connections
and
use.
In
many
of
the
turntables
and
record changers
made
today
there
is a
separate
ground wire.
This
should
be con-
nected
to
the
screw
on
the
back
panel
of
the
SCA-35 above
the
phono
inputs.
If
such
a
ground
wire is
not
supplied
with
yout
phonograph,
then
it
may
be necessary to
connect
a
wire,
in
addition
to
the
audio
signal cables from
the
car-
tridge, from a
ground
point
on
the
turntable
motor
or
arm
to
the
grounding screw
on
the
SCA-35.
Normally
it
is
not
desirable
to
make
further
ground
conections
to
water
pipes
or
to
an
"earth"
ground.
If
the
phono
cartridge
is a mono one,
then
it
is suggested
that
you
COlUlcct
its
output
to
only
one
input
(either
chan-
nel).
If
you
want
to
hear
sound
through
both
channels,
turn
the
stereo-mono
switch
on
the
front
panel
to
its
mono posi-
tion
to
hear
the
program
through
both
loudspeakers.
Tape
Connections
The
SCA-35
can
be
used
either
with
a
tape
machine
which has
its
own
tape
amplifier, or
playback
electronics, or
with
a
tape
deck
having
direct
output
from
the
tape
head.
If
the
machine
has
a
tape
playback
amplifier,
then
the
out-
put
is
at
a
relatively
high
level.
In
this
case
this
output
is
connected to
the
input
of
the
SCA-35
marked
"From
TAPE
AMP."
If
the
machine
is
a
deck
only,
the
output
is
very
low
and
the
input
marked
"From
TAPE
HD"
is
used.
The
tape
head
input
has
very
high
amplification
and
the
required
NAB
7%
i.p.s.
equalization
for
tape
head
playback.
Generally, when
the
tape
head
input
is used, a
ground
wire
must
be
connected
from a specific
point
on
the
tape
deck
(see
instructions
supplied
with
tape
deck)
to
the
grounding
screw
on
the
SCA-35.
Try
it
with
and
without
this
ground
wire for lowest
hum.
If
the
tape
machine
has
a recording amplifier,
you
can
connect
the SCA-35
to
the
tape
machine
for recording from
the
phonograph
or
from
the
tuner.
The
high
level
input
of
the
tape
recorder
(not
the
microphone
input)
should
be
connected
to
the
socket
marked
"To
TAPE
RECORD."
Whatever
is being
played
through
the
SCA-35 will be re-
corded
unaffected
by
volume
and
tone
controls
of
the
SCA.
Thus
you
can
listen
to
a
program
and
adjust
volume
and
tone
controls
to
suit,
without
affecting
the
signal going
into
the recorder.
In
the
special case where
it
is
desired
to
play
a
multi-
track
tape
with
a
monophonic
recording
on
all
tracks
4
through
the
SCA-35,
the
track
recorded
in
the
opposite
direction
will
come
through
one
channel
of
the
SCA-35
unless
one
of
two
expedients
is
used
to
prevent
this:
(1)
One cable
can
be
removed
from
the
unwanted
chann*,
then
by
using
the
mono
position of
the
stereo-mono
swit~)
the
sound
will come
through
both
speakers,
or
(2)
The-
balance
control
can
be
turned
to
either
extreme
position to
eliminate
sound
through
the
unwanted
channel.
The
SCA-35
can
be
used
for
playing
recorded
tape,
but
it
cannot
be
used
for recording
with
a
tape
deck which
has
no
recording preamplifier.
Radio
Connections
Radio
tuners
which
can
supply
one
volt
or
more
audio
output
can
be
used
with
the
SCA-35.
If
the
tuncr
is
FM
stereophonic,
then
its
left
output
is COlmected
to
the
upper
radio
input
and
the
right
output
goes
to
the
lower
radio
input
of
the
SCA-35.
If
the
tuncr
is monophonic,
it
can
be
connected
either
with a
"Y"
connector
to
both
radio
inputs,
or
to
only
one
input.
If
one
input
is used,
you
will have
to
turn
the
stereo-mono
switch
to
the
mono
position to receive
sound
from
both
speakers.
If
the
tuner
has
separate
outputs
for
AM
and
FM
with-
out
its
own provision for switching these,
you
may
use
one
(or
both)
of the
radio
inputs
for
FM
and
the
spare
inputs
for
AM.
Then
selection of
FM
or
AM
broadcasts
can
be
made
with
the
selector switch
on
the
SCA-35.
Additional
Inputs
The
spare
input
of
the
SCA-35 will
accommodate
any
type
of
high
level
input
source which provides
one
volt
or
more
of
audio
signal. A second
tape
machine
(having
play-
~
back
electronics huilt
in)
or
tuner
may
be
used
in
this
inpue
'
or
a
second
phonograph
which
includes
its
own preamplifier.
Loudspeakers
The
SCA-35
can
provide
sufficient power to
drive
all
but
the
most
inefficient
loudspeaker
systems.
Check
the
specifi-
cations
of
the
loudspeaker
to
determine
its
impedance.
Generally
this
will be 8
or
16 ohms.
The
speaker
terminals
of
the
SCA-35
are
marked
for
speakers
of
these
values,
but
these
terminals
will
accommodate
a wider range of imped-
ances
than
marked.
For
example,
the
8
ohm
output
can
be
used
for
speakers
of 4 to 11 ohm ratings;
the
16
ohm
output
can
be
used
with
speakers
from 12
to
20 ohms.
The
left
channel
loudspeaker
should
be
connected
to the
upper
output
strip. A
pair
of wires,
such
as
# 18
lamp
cord,
should
be
used
with
one
wire going to
the
common
terminal
(marked
HC")
and
the
other
to
the
8
or
16
ohm
terminal.
The
right
speaker
should
be
similarly
connected
to
the
lower
output
strip.
Note
that
the
extreme
left
hand
screws
on
each
strip
are
connected
together
by
a wire
strap.
N
either
of
the
two
speakers
should
be
connected
to
these
terminals. However,
it
is possible to
connect
a thiJ:d loud-
speaker-as
a
center
or
remote
speaker--·to
these
terminals.
Details
on
this use
are
given later.
It
is also possible to
connect
headphones
to the
loudspeaker
terminals, a
subject
covered
in
detail
later.
In
any
music
system
it
is
best
that
both
loudspeakers
be
identical.
If
this
is
not
possible, the
stereo
effect
may
be
considerably
distorted,
and
there
will be shifting of
positicA'
of
sounds
between the
speakers
in a way which is
unrelat~P'
to
the
correct
localization of those sounds.
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