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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





Hitachi FT-440 tuner

 Hitachi model FT-440 AM/FM Stereo Tuner
Specifications:
Circuitry:  AM/FM 2-band stereo tuner
Semiconductors:  12 Transisors; 1 FED; 2 ICs; 23 Diodes; 2 LED
FM Section
Frequency Range:  88 - 108 MHz
Usable Sensitivity:  1,7 µV (IHF)
Image Rejection:  75 dB
IF Rejection:  100 dB
Distortion:
Monaural :  0,1% (400 Hz)
Stereo :  0,25% (400 Hz)
Signal-to-Noise ratio:  76 dB
Selectivity:  80 dB (±400 Hz)
Stereo Separation:  50 dB (1 kHz)
Capture Ratio:  1,0 dB
Antenna Input Impedance:  300 Ω balanced type; 75 Ω unbalanced type
AM Section
Frequency Range:  530 - 1,605 kHz
Usable Sensitivity:  12 µV (IHF), 250 µV/m (bar antenne)
Image Rejection:  45 dB (1000 kHz)
IF Rejection:  388 dB
Selectivity:  34 dB (±10 kHz)
Signal-to-Noise Ratio:  45 dB
Output Voltage:
AM :  0 -165 mV (variable) [400 Hz, 30% modulation]
FM :  0 - 550 mV (variable [400 Hz, 100% modulation]
Power Requirements:  AC 120 V 60 Hz or 110 V, 120 V, 220 V, 240 V 50/60 Hz
Power Consumption:  12 W
Dimensions (W x H x D):  435 x 166 x 377 mm
Weight:  7 kg (15,4 lbs)


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