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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





Akai AT 2450 (1978)

FM TUNER SECTION

Frequency Range: 87,5 MHz to 108 MHz

Sensitivity (IHF): 1,7 μV

Capture ratio: 1,2 dB

Selectivity (IHF): More than 80 dB

Image Rejection: More than 90 dB (98 MHz)

IF Rejection: More than 100 dB (98 MHz)

Spurious Rejection: More than 100 dB (98MHz)

AM Suppression: 55 dB

Signal to Noise Ratio: 75 dB

Harmonic Distortion:

Mono: less than 0,15% (100% modulation)

Stereo: Less than 0,2% (100% modulation)

Muting: Level Control (1 μV to 100μV)

Stereo Separation: More than 45 dB (1 kHz)

Sub Carrier Suppression: More than 65 dB

Output Voltage: Controllable from 0 mV to 2,0 V (100% modulation)

Fixed: 0,77V (100% modulation)

Antenna Input Impedance: 300 ohms balanced, 75 ohms unbalanced

AM TUNER SECTION

Frequency Range: 520 kHz to 1,605 kHz

Sensitivity (IHF): 100 μV/m (bar antenna), 15 μV (external antenna)

Selectivity (IHF): More than 30 dB

Image Rejection: More than 50 dB (1,000 kHz)

IF Rejection: More than 40 dB

Signal to Noise Ratio: More than 55 dB

Output Voltage: Controllable from 0 to 2 V

Antenna: Built-in ferrite bar antenna

MISCELLANEOUS

Semi-Conductors: Transistors: 9, Diodes: 14, FETs: 1, ICs: 4

Power Requirements: 110/220/240 V, 50 -60 Hz Switchable

Dimensions: 440 x 144 x 368 mm; (17,3 x 5,7 x 14,5 inches) (W x H x D)

Weight: 7,3 kg (16,1 lbs)

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