What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.



H.H. Scott '59





H.H. Scott 390R

Scott's new 390R is perhaps the most complete receiver ever made. A professional control center for your entire sound system, the 390R delivers a full 120 watts per channel (min. RMS, 8 Ω 20-20,000 Hz no more than 0,03 T.H.D.). And it offers more options, features and flexibility than you 'll find on most separates.
Features:
DC configuration OCL power amplifier with fully complementary output stage.
Bimodal electrosensor relay protection and delay circuit with LED indication.
Differental current mirror loaded low noise input stage.
Centaer channel and signal strength tuning meters
18 LED Analog to Digital logarithmic power display indication calibrated in watts and dBW
3 stage IF amplifier incorporating 3 linear phase ceramic filters with differential limiter and quadrature detector
LED function indicators
Connections for 3 pair of speakers
2 phono input
5 gang FM tuning capacitor with twin stage dual gate MOS FET TRF amp
Multiplex filter

Specifications
FM Tuner Section
Tuning Range:  87,5 to 108 MHz
IHF Sensitivity:  9,8 dBf/ 1,7 µV
50 dB Quieting Sensitivity:
Mono :  15,6 dBf/3,3 µV
Stereo :  35,6 dBf/33 µV
Signal-to-Noise Ratio(at 65 dBf):
Mono :  80 dB
Stereo:  75 dB
Distortion (at 65 dBf):
Mono :  0,15
Stereo :  75 dB
Frequency Response:  25 Hz - 15 kHz (±2 dB)
Capture Ratio:  1,0 dB
Alternate Channel Selectivity:  80 dB
Image Rejection:  90 dB
Stereo Separation at 1 kHz:  50 dB
Spurious Response Rejection:  100 dB
Subcarrier rejection:  74 dB
IF Rejection (98 MHz):  100 dB
AM Section Tuner
Tuning Range:  515 to 1620 kHz
Usable Sensitivity (bar antenna):  150 µV/m
Signal-to-Noise Ratio:  55 dB
Selectivity ( 1Mhz):  500 dB
Image Rejection:  60 dB
Amplifier Section
Minimum Continuous RMS Output Power Per Channel (both channels driven into 8 Ω from 20 Hz to 20 kHz with no more than rated T.H.D. :  120 watts
Total Harmonic Distortion at Rated Output:  0,03%
Total Harmonic Distortion at 10 Watts, 20 Hz - 20 kHz :  0,015%
IMD at Rated Output:  0,03%
Input Sensitivity:
Phono 1 :  2,5 mV/5 mV
Phono 2 :  2,5 mV/5 mV
Others :  150 mV
Signal-to-Noise Ratio Weighted , Input Shorted
Phono :  90 dB (re: 10 mV RIAA 1 kHz)
Others :  95 dB
Frequency response:
Phono :  20 Hz - 20 kHz ±0,5 dB (RIAA)
Others at 1 watt :  20 Hz - 20 kHz ±0,5 dB
Phono Overload:  300/600 mV
Tone Control Range:
Bass :  ±10 dB at 100 Hz
Mid :  ±6 dB at 1 kHz
Treble :  ±10 dB at 10 kHz
Filters:
High :  8 kHz 12 dB /oct
Subsonic :  18 Hz  12 dB/oct
Loudness Compensation at -30 dB
=3,5 dB at 10 kHz
+7 dB at 100 Hz
Channel Separation:
Phono 1 kHz :  70 dB
Others 1 kHz :  75 dB
Crosstalk (1 kHz):  75 dB
Damping Factor (1 kHz)  8 Ω:  better than 100
General
Line Voltage and Frequency
US/canada :  117 V AC 60 Hz
Europe :  100 V, 117 V, 220 V, 240 V switchable 50/60 Hz
Power Consumption:
US/Canada :  320 watts
Europe ;  800 watts
Dimensions (W x H x D):  580 x 165 x 400 mm (6-1/2" x 22-7/8" x 15-3/4")
Weight:  22,3 kg (49,0 lbs)


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