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

Sony ST-70 tuner

AM/FM Stereo Tuner
A stereo tuner offering many facilities normally found inn more expensive models. It provides for a reasonable price the additional dimension of a stereo radio to your hi-fi system.

An incredibily compact AM/FM stereo tuner offering facilities normally found inn more expensive models. These include MPX decoder for FM stereo, AFC switch, tuning meter, stereo indicator ligt, built-in AM/FM aerials and external antenna terminals for AM/FM.
For clarity, purity , and economy model ST-70.
FM Tuner Section
Tuning Range :  87,5 - 108 MHz (3,43 - 2,78 m)
Aerial Antenna:  300 Ω balanced
Intermediate Frequency:  10,7 MHz
Sensitivity:  2 µV, (s/n30 dB)
Signal-to-Noise ratio:  65 dB
Capture Ratio:  4 dB (IHF)
Image Rejection:  40 dB (IHF)
IF Rejection:  90 dB
AM Suppression:  45 dB
Frequency Response:  20 -15,000 Hz ±3 dB
Harmonic Distortion : 
Monaural :  0,5% at 400 Hz
Stereo :  1,0 % at 400 Hz
Stereo Separation:  35 dB at 400 Hz
AM Tuner Section
Tuning Range:  530 -1605 kHz (566 - 187 m)
Aerial:  Built-in ferrite bar aerial and external aerial terminal
Intermediate Frequency:  469 kHz
Sensitivity MW:  48 dB/m built-in aerial, 20 µV external aerial
Signal-to-Noise Ratio:  50 dB
Output Level:
High :  2 V
Normal :  750 mV
Circuit System:  FM/AM superheterodyne tuner
Semiconductors:  14 Transistors;  1 FET; 15 Diodes
Power Requirements:  AC 240 V 50 Hz
Power Consumption:  8 watts
Dimensions (W x H x D):  330 x 87 x 245 mm (13" x 3-1/2" x 9-7/10") including projecting parts
Weight:  2,8 kg (6 lb 2 oz)

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