SOME
UNIQUE
FEATURES
@FM
front-end
employing
a field
effect
transistor to hear more stations more clearly
@ Integrated circuit (IC) employed in FM tuner
assures outstanding capture ratio with high
reliability.
@Multiplex
circuitry
(MIPX)
for
maximum
channel separation
@uUnique
muting circuit permits the easiest
tuning control
@High
performance single ended
push-pull
(SEPP)
output
stage
eliminates
audio
transformers and provides large output with
true frequency fidelity
@Full
complement
of inputs and outputs
@Electronic
switch
fully
protects
the
precious power transistors
INSTALLATION
Remember that the SX-1500 T is a transistorized receiver. Desira-
ble places to install the SX-1500T
are:
@Places airy and free from
humidity and dust. Avoid installing
on close, low-ceiling shelves.
@Places
not directly exposed to the sun
ray.
By the use of FET (field effect transistor) in the FM
radio frequency amplifier
stage,
design
of nearly
perfect
FM
front-end
was achieved—free
from
cross
modulation,
free
from
drift,
with
better
sensitivity,
lower
inherent
noise, and
high spurious
rejection ratio.
In the FM intermediate frequency amplifier stage, integrated circuits are employed,
resulting in an entirely different outstanding
performance from that of IF stages
hitherto
designed,
especially
in the limiter characteristic
and
the capture
ratio.
The
accurate
electronic
switching
circuitry
is employed
in the
FM
multiplex
demodulator,
insuring maximum
separation
with excellent
tonal quality.
The
muting
circuit
provided
in the FM
tuner
completely
eliminates
the FM
inter-station
noise which
has hitherto been annoying the user in tuning.
The
power
amplifier
employs
the
high-performance
single
ended
push-pull
circuitry in the output stage and the push-pull complementary
circuitry in the
driver
stage,
completely
eliminating
the
distortion inherent
transformers
from
the audio stage. Trippie diffused
mesa
transistors
are adopted
as
the
power
transistors
in the output
stage for full-fidelity frequency
response
with
large
audio output
power
and
least harmonic
distortion.
The inputs and outputs
provided
in the receiver
include
two pairs of PHONO
MAG
inputs.
When
two turntables
are connected
to these
inputs,
the
user
is able
to switch
from
one
turntable to the other
any time
at will. Also, two
pairs of loudspeaker
outputs are included
for switching
between,
or for per-
mitting the simultaneous use of, two loudspeakers.
The electronic switching circuitry employed in the power supply completely protects
expensive power transistors even when
the loudspeaker leads are shorted while
the receiver unit is in use.
@Places where there.is as little vibration as possible and where
the surface
is level.
The optimum stereophonic listening position
is across the room
from
the speakers,
somewhere
close to. the
midpoint
between
the right and left speaker systems.
@Places not close to heat-emitting objects
such as heaters and
stoves,
Switching Line Voltage Setting and Fuse
In order to remove the fuse, turn the fuse cap located on the
line voltage selector switch in the direction indicated by an arrow.
Then
remove
the fuse plug from
the unit. Put the fuse plug
back so that the proper fine voltage marking can be seen thru
the cut on the edge of the plug.
Whenever
the set position
of the selector
switch
is changed,
check
the rating of the fuse.
A 1.5-ampere
fuse is to be used
for either 220V
or 240V
operation
and
a 3-ampere
fuse
for
any
of 110V,
117V,
or 130V
operation.
If the rating of the
fuse is proper,
install the fuse on the fuse cap.
FUSE CAP
FUSE
FUSE
PLUG
SOCKET
Take off the fuse cap
by
turning
it
with
a
coin, etc. in the
direction
indicated
by the
@Replacing of Fuse
When
the fuse is blown off, remove the fuse cap and replace
the fuse with a new one.
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