Sansui G-3500 - Specifications

G-3500/301
G-4500/401
SPECIFICATIONS -
\
G-4500/401
Hum
and
noise
(short-circuit,
A
network}
Capture
ratio
.......
1.3
dB
Audio ection PHONO ......... 75 dB Image response ratio... 48 dB (at 98 MHz)
Power
output
RUK
oo
oo
wale
eee
a
95
dB
Spurious
response
ratio
.
70
dB
(at
98
MHz)
Min.
RMS,
both
channels
driven,
from
20
to
20,000
Hz,
with
no
cents
Stereo
separation.
...
.
30
dB
at
100
Hz
more
than
0.1%
total
harmonic
distortion.
BASS
.......--.
+10
dB
{50
Hz)
40
dB
at
1,000
Hz
40
watts
per
channel
into
8
ohms
TREBLE
........
+10
dB
(10
kHz)
28
dB
at
10,000
Hz
Load
impedance
.....
8
ohms
LOUDNESS
(—30
dB)
.
7
dB
at
50
Hz
Frequency
response
...
3010
15,000
Hz
+0.5
dB
—1.0dB.
Total
harmonic
dictortion
5
dB
at
10
kHz
Antenna
input
impedance
RO
rere
rere
a
less
than
0.1%
at
or
below
rated
min.
;
wee
eee
eee
eee
300
ohms
balanced
RMS
power
output
FM
section
75
ohms
unbalanced
intermodulation
distortion
(70
Hz
:
7kHz=4:1SMPTE
method)
—-
Funingrange
......
-
88
to
108
MHz
AM
section
“a
pe
ya
ney
Mie
eae
ee
less
than
0.1%
Usable
sensitivity
Tuning
range
.......
530
to
1,600
kHz
Frequency
response
(at
1
watt)
Mono
!lHF........
11.0
dBf
(1.95
2V)
Usable
sensitivity
(Bar
antenna)
ou
es
een
re
ees
10
to
50.000
Hz
+1
dB
-2
dB
DIN.
.......
1.2
yV
Cee
eee
ee
eee
es
50
dBfm
(300
pV/m)
«.
RIAA
curve
deviation
(PHONO)
:
Stereo
IHF
.......
19.0
dBf
Selectivity
(£10
kHz)
..
3548
OTT
Oe
Te
+0.5
dB
—0.5
dB
(30
to
15,000
Hz)
50
dB
Quieting
sensitivity
Signal
to
noise
ratio
...
46
dB
ing
factor......
;
{
t
MONO:
sy-8
ee
aca
es
15
dBf
Power
requirements
Penner
cere
ee
rote
oe
Steree
2.0Grae
eek
ws
38
dBf
Power
voltage.
.....
100,
120,
220,
240
V
(50/60
Hz)
Input
sensitivity
and
impedance
(1
kHz,
for
rated
power
output)
—=»_-S!gnal
to
noise
ratio
(at
65
dBf}
120
V
(Usable
110
~
130
V)
‘i
.
PHONO
.........
2.5
mV/47
kilohms
Mono
......-.-.-
71
dB
60
Hz
(for
U.S.A.
and
Canada
only
(Max.
input
capability;
200
mV
at
1
kHz,
less
than
0.5%
total
Stereo...
1+.
+e
68
dB
Power
consumption
"
harmonic
distortion}
Distortion
{at
65
dBf)
Rated
consumption
.
115
watts
145
V
:
AUX.
TAPE.......
150
mV/47
kilohms
MORG:
oie
se
awe
g
4%
less
than
0.18%
at
100
Hz
Dimensions
........
433
mm
(17-1
/16
)w
WiC
vacn
sccutted
te
8
mV/10
kilohms
less
than
0.15%
at
1,000
Hz
153
mm
(6-1/16")
H
Output
level
{1
kHz)
jess
than
0.25%
at
6,000
Hz
354
mm
(14”)
D
TAPE
REC
(pinjack)
.
150
mV/47
kilohms
Stereo...
2...
ee
jess
than
0.3%
at
100
Hz
Weight.
.......-.-.
8.1
kg
(17.9
Ibs)
net
Channel
separation
(1
kHz,
at
rated
power
output)
less
than
0.25%
at
1,000
Hz
9.5
kg
(20.9
!bs)
packed
PHONO
.........
better
than
50
dB
less
than
0.3%
at
6,000
Hz
ee
ALI
chor
eo
Gi
ets
better
than
50
dB
Alternate
channel
selectivity
(at
400
kHz)
*
Design
and
specifications
subject
to
change
without
notice
oy
50 dB
1. OPERATIONS
Pop-noise preventive circuit
In order to prevent the annoying pop-noise to the loudspeakers at
turning the power of the amplifier ON, the pop-noise preventive cir-
cuit adopted in the G-4500/401 is the combination of the conven-
tional driver-voltage delay type used in the power supply (rectifier)
circuit and the NF delay type pop-noise preventive circuits. The
configuration of NF delay type pop-noise preventive circuit is
shown in Fig. 1.
In this circuit, the switching (ON-OFF) of the transistor TROS is
made by the time constant of the capacitor C40 and resistor R88.
Thereby the NF resistor, R51 is controlled, and the gain of the main
amplifier stage is lowered when TROS is ON, thus the voltage drift
(transient voltage) of the main amplifier at turning the power ON
does not appear on the speaker terminals for very short period of
time. In other words, at the instant that the power is turned ON,
the voltage at the point A rises up to +13V, then the voltage de-
creases by means of the time constant of C40 and R88 as shown in
Fig. 2. At this time, the diode D11 is inversely biased, consequently,
the potential voltage of the point B is OV as Fig. 3. Because of this,
TROS turns to the cut-off, thus the NF resistor, R51 acquires such a
state as its resistance value becomes equivalently very large, which
decreases the gain of the power amplifier. When the charge of the
C40 is completed, the voltage of the point B (see Fig. 3) becomes
negative, as a result, the diode D11 is biased. Therefore, TROS is
turned ON and the circuit of this equipment is normally operated
_ approximately 2 seconds after the power is turned ON to prevent
the pop-noise which flows to loudspeakers.
Fig. 1
to speaker terminals
for improvements.
+13V
> From this point, the set begins
< 2 seconds ———™__ working normally.
VOLTAGE —~
]
Power ON
Fig. 2 Voltage variation during a certain period
of time at @
VOLTAGE—>
oO
1
2 seconds ————>
1
Fig. 3 Voltage variation at