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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-2400 (1975)


FM TUNER SECTION
Frequency Range: 88MHz to 108 MHz
Sensitivity (IHF): 1,8 μV
Capture ratio: 1,0 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 0,2% (100% modulation)
Stereo: Less than 0,3% (100% modulation)
Tuning Indicator: Signal Strength meter and Center Tuning meter
Muting: level Control (5μV to 100μV) / Switchable to ON-OFF
Stereo Separation: More than 42 dB (1 kHz)
Sub Carrier Suppression: More than 65 dB
Output Voltage Variable: From 0 mV to 1,6V
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): 180μV/m (bar antenna), 15μV (external antenna)
Selectivity (IHF): More than 30 dB
Image Rejection: More than 55 dB (1,000 kHz)
IF Rejection: More than 45 dB
Signal to Noise Ratio: More than 50 dB
Output Voltage Variable: From 0mV to 550 mV
Fixed: 250 mV (30% modulation)
Antenna: Built-in ferrite bar antenna

MISCELLANEOUS
Semi-Conductors: Transistors: 12, Diodes: 9, FETs: 1, ICs: 4
Power Requirements: 110/220/240 V, 50 -60 Hz Switchable
Dimensions: 440 x 141 x 336 mm; (17,3 x 5,6 x 13,2 inches) (W x H x D)
Weight: 6,6 kg (14,5 lbs)


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