Digital Synthesizer
Stereo Receiver
Absolutely Precise
Digital Synthesizer Tuning with 12 memory Positions, 4 Instant Selection of 6
FM and 6 AM Stations.
Beautifully styled
with walnut side panels and brushed aluminum front panels. Lower half of front
panel disappears into the unit to expose less often used controls. Double-pair
speaker selection, tone control defeat (flat) switch, subsonic filter, loudness
switch, stereo/mono mode selection, push-button source selection with full tape
monitoring/duplicating facilities including a source-on/recording-off position.
Green LED tuner
frequency, signal-strength, stereo and band displays. All push-button tuning
system using quartz crystal digital synthesizer system providing manual and
automatic tuning with six each preset memory stations for FM and AM.
A professional
41-position click-stop volume control is conveniently located at the upper
right. Superb craftsmanship coupled with advanced technology - the essence of Toshiba's attitude toward high
fidelity component design.
Quartz Reference
Frequency Synthesizer Tuner
Both the FM and AM
tuner sections make use of quartz crystal reference frequency and digital
frequency synthesizer circuits with PLL system to insure essentially perfect
station tuning each and every time. What's more, the ultra-stable control
voltage of the PLL is used to tune the 3-gang variable capacitance diodes of
the front-end for excellent sensitivity and adjacent channel rejection. This
means more received signal power for higher Signal-to-Noise Ratio and less
phase distortion than from conventional tuners.
Manual and Automatic
Tuning
You get your choice
of tuning either manually or automatically with push-button selection. In the
manual mode, you can tune up or down the FM band in 0,1 MHz increments while
for AM, the increments are 1 kHz. In the automatic mode (FM : Auto Tuning, AM : 10 kHz step tuning), you
have a choice of any of six present stations and this holds true for either AM
or FM giving you twelve preset stations in all. And more, presenting the
station frequency is just as simple by manually tuning to the desired station
and pressing two buttons (memory and channel). Channel frequencies are retained
with power off and even for a good time with the power cord removed from the
outlet.
Clean Stereo
Amplification for Low Noise at High Power Levels
Full-complementary direct-coupled power amplifiers provide 50 Watts
rms power per channel into 8 Ω
and are driven by low distortion differential
amplifiers and powerful Darlington drivers with plenty of feedback for
inaudible distortion. Clean power supply designs using an extra-large
triple-secondary power transformer and twin 10,000 µFd filter capacitors keep
power line noise and hum out of the outputs and prevent back-coupling to the
low level preamp and tuner stages.
Full Tape
Monitoring/Duplicating
You get provisions
for attaching two three-head (or other) tape decks to the SA-850 with full
monitoring provisions plus duplicating switching between the decks either way,
1 to 2 or 2 to 1. and, to isolate the input amplifiers of the decks when their
power is off, a special intermediate source monitoring switch position (REC
OFF) has been added which eliminates the record output signals to the decks.
Wide Range Sound
Quality Controls
A large 41-position
click-stop volume control is conveniently located at the top, right of the
SA-850 to give you level control capability. Twin-pair speaker selection
switching lets you fully utilize speakers in remote locations and provides
silent operation for use with headphones. Bass/treble controls can be defeated
by just loudness control. A subsonic filter eliminates rumble and other low
frequency player/disc problems which occur occasionally and a mode switch
permits monaural deck playback through both speakers.
Specifications
Main Amplifier
Section
Power Output (Both Channels Driven):
continuous power output of 50 Watts per channel , minimum rms int 8 Ω from 20 to 20,000 Hz
and with no more than 0,03% T.H.D.
55 watts into 8 Ω
at 1t 1,000 Hz
Total Harmonic Distortion( (20 to 20,000 Hz, 8 Ω )
0,03% or less at 50
Watts per channel
0,02% or less at 25
Watts per channel
0,02% or less at 1
Watt per channel
Intermodulation Distortion (50 Hz : 7000 Hz signals mixed at 4 : 1 ,
at 8 Ω )
0,03% or less at 50
Watts per channel
0,02% or less at 25
Watts per channel
0,02% or less at 1
Watt per channel
Power
Bandwidth: 10 to 35,000 Hz
Residual Noise: 0,5 mV rms
into 8 Ω
Damping Factor: 50
Preamplifier Section
Frequency Response
Aux : 10 to 40,000 Hz +0,5, -1,0 dB
Phoo : 20 to 20,000 Hz ±0,3 dB
T.H.D: 0,025 % or less
Subsonic
Filter: 16 Hz , 6 dB/oct
Signal-to-Noise
Ratio
Phono : 78 dB (2,5 mV), 90 dB (10 mV)
Tape/AUX : 95 dB
Phono Overload
Level: 200 mV rms 1,000 Hz
Input
Sensitivity/Impedance
Phono : 2,5 mV/47 k Ω
Tuner/AUX : 150 mV/47 k Ω
Tape : 150 mV/47 k Ω
Output Level:
Tape Rec : 150 mV
Tone Control
Bass : ±10 dB at 100 Hz
Trebble : ±10 dB at 10,000 Hz
Loudness Control
(-40 dB position)
+8 dB at 100
Hz; +4 dB at 10,000 Hz
FM Tuner Section
Usable
Sensitivity: 10,3 dBf (1,8 µV)
50 dB Quieting
Sensitivity:
Stereo : 38,2 dBf (45 µV)
Mono : 15,3 dBf (3,2 µV)
Signal-to-Noise
Ratio
Stereo : 68 dB
Mono : 72 dB
Distortion (1,000 Hz
)
Stereo : 0,2%
Mono : 0,15%
Frequency
Response: 20 to 15,000 Hz +0,5 -1,5 dB
Capture Ratio: 1,0 dB
Selectivity: 80 dB
Spurious
Rejection: 75 dB
Image
Rejection: 60 dB at 98 MHz
Subcarrier
Rejection: 60 dB
IF Rejection: 90 dB
AM Suppression: 50 dB
Muting
Threshold: 13,3 dBf (2,5 µV)
Stereo Separation:
45 dB at 1,000 Hz
30 dB from 30 to
15,000 Hz
Antenna
300 Ω
balanced twin-line feeder
75 Ω
unbalanced coaxial cable
AM Tuner Section
Sensitivity: 300 µV/m (IHF, ferrite antenna)
Selectivity: 35 dB
Signal-to-Noise
Ratio: 50 dB
Image
Rejection: 35 dB
IF Rejection: 30 dB
General
Power
Requirements: AC 120 V, 60 Hz
Power
Consumption: 220 W (2,7 A)
Dimensions (W x H x
D): 480 x 115 x 390 mm (18,9" x
4,5" x 15,4")
Weight: 12 kg (26,4 lbs)
