Scott 348-B Service Manual

SPECIFICATIONS
TUNER
(FM-MPX)
Scott ... where innovation is a tradition
~
SCOTT@
SERVICE MANUAL
FOR
MODEL 348-B
Usable Sensitivity (IHF) - 3% THD, Noise and Hum
Signal to Noise Ratio
Total Harmonic Distortion, Mono
Frequency Deviation (Drift) less than
*Frequency Response
Capture Ratio
Selectivity (400 kHz off channel)
Spurious Response Rejection (Cross modulation rejection)
19 kHz Pilot Suppression
38 kHz Sub-carrier Suppression
AM
Suppression
Tuning Range
Accuracy of Calibration
Separation
l.5uv
65dB
0.8%
.02%
50 to
l.9dB
45dB
90dB
40dB
60dB
55dB
15,000 Hz+ 1 dB
-
87
to
109
me
0.5%
40dB
*This is limit of FCC Stereo Broadcast specifications. All H. H. Scott tuners have far wider
frequency re~ponse.
AMPLIFIRR
TaJ)e
Ou,tput
Rated voltage to tape recorder
Recommended load resistance:
greater than
Recommended cable capacitance - less than
tfag. Low .... - _In,put Impedan.E,e
Signal for rated output (switch selected}
S/N Ratio
!ape Head ,- Input. ,,Im2edance
Signal for rated output
S/N Ratio
H~gh Level Inputs - Input ~m2e~ance
Signal for rated output
S/N Ratio
Frequency response in flat position
Treble Controls: Boost and Cut at 10,000 Hz.
Bass Controls: Boost and Cut at 50 Hz.
Lousness Compensation, maximum
Rumble filter
Music Power
@
4 ohm
@
8 ohm
Rating (watts/channel)@ 0.8% harmonic distortion
Continuous Output - Single C~annel @·8 ohms
0.8% Harmonic Distortion
Continuous Output - Both Channels@
8
ohms
0.8% Harmonic Distortion
Total Harmonic Distortion at rated output
Fr~quency Response - Power Amplifier@ 1·w
Power Bandwidth at rated distortion (IHFM method)
Hum and Noise
Damping Factor
Line Voltage and Frequency
Power Consumption@ 117 volts, 60 Hz
1
C Copyright H. H. Scott, Inc, 1967
0,5
V
200 k ohms
200 pF
47 k ohms
3,5,9, mv
65dB
47 k
ohms
3.0 mv . .
-52dB
47 k
ohms
0,5
V
-80dB
17 to 30,000 Hz+ ldB
-
9dB - 9dB
9dB - 9dB
+8dB at 50 Hz
+3dB
at
10,000 Hz
8dB
@
50 Hz
60/60 watts
50/50 watts
40 watts
30/30 watts
0.8%
20 to 20,000 Hz+ ldB
-
20
to 2,000
Hz
-80dB
20
105-125 v, 50-60 Hz
35-175
w
Form D-348-B-2W