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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





Kenwood KT-7000


 Solid State AM-FM Stereo Tuner model KT-7000
Features:
3 FETs, 4 gang tuning condenser front-end for superior sensitivity and spurious response ratio.
4 ICs and 2 Crystal Filter IF stages provide greatest selectivity.
Interstation Muting Circuit suppresses interstation noises.
New AM-FM Signal Strength Meter and FM Zero-center Tuning Meter with Stereo Indicator for perfect tunung.

 7¾" wide dial scale and heavy fly-wheel for easy tuning.
Automatic FM Stereo/Mono Mode silent switching circuit with Stereo Indicator
MPX Filter for eliminating noise on Stereo Signals without affecting the frequency response.
Step type Output Level Conrol to supply the proper input to amplifier
Luminous dial glass.
300 ohms balanced and 75 ohms unbalanced antenna terminals.


Specifications
FM Section
Usable Sensitivity, IHF:  1,5 µV
Frequency Response:  20 Hz to 15,000 Hz,  +0 -2 dB
Harmonic Distortion (at 400 Hz, 100% Modulation): 
Mono : Less than 0,3%
Stereo : Less than 0,6%
Signal to Noise Ratio:  Better than 70 dB at 30 µV input or more
S/N Ratio (at 100% Modulation):  better than 55 dB at 5 µV Input
Capture Ratio, IHF:  1,3 dB
Image Frequency Rejection (at 100 MHz):  Better than 100 dB
Cross Modulation Rejection:  Better than 100 dB
IF Rejection:  Better than 60 dB
Multiplex Carrier Suppression:  Better than 50 dB
Stereo Separation:
at 1,000 Hz : Better than 35 dB
at 10,000 Hz : Better that 25 dB
Output Voltage:  1,5 Volts (at 400 Hz, 100% Modulation)
Antenna Input Impedance: 
Balanced : 300 Ω
Unbalanced : 75Ω
Output Impedance:  7,000 Ω
Stero Noise Filter:  High Frequency Blend Circuit
Inter Station Muting:  Yes
AM Section
Usable Sensitivity, IHF: 
15 µV (Ext. Antenna Terminal);
100 µV (Bar Antenna)
Selectivity:  Better than 25 dB
Image Rejection:  Better than 80 dB
IF Rejection:  Better than 70 dB
Output Voltage:  0,4 Volt (at 400 Hz, 30% Modulation)
Power Consumption:  20 watts
Power Supply:  Ac 110 - 120V / 220 -240V,  50/60 Hz
Dimensions ( W x H x D):  16-5/16" x 5-5/32" x 11-1/32" (not including Control Knobs)
Weight:  18 lbs

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