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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-880DL tuner

 

Quartz Synthesized FM/MW/LW Tuner with DLRC

Features

Pentacle Power Supply system

New Direct Linear Reception Circuit (DLRC)

Quartz synthesized tuner with computer controlled tuning system

20-station random preset memory with display

Automatic and manual digital tuning

Wide/Narrow FM IF band selector

Fluorescent dynamic tuning process display

FM auto-muting

 


Specifications

FM Tuner Section

Tunung Frequency Range:  87,5 MHz - 108 MHz

Antenna Impedance:  75 Ω  unbalanced

Usable Sensitivity:  10,8 dBf (0,95 µV)

50 dB Quieting Sensitivity

Mono :  16,2 dBf (1,8 µV)

Stereo :  38,8 dBf (24,0 µV)

Total Harmonic Distortion (1 kHz)

Mono :  0,04%

Stereo :  0,06%

Signal-to-Noise Ratio

Mono :  88 dB (at 65 dBf); 88 dB (at 85 dBf)

Stereo :  76 dB (at 65 dBf); 82 dB (at 85 dBf)

Capture Ratio: 

Wide :  1,0 dB

Narrow ;  2,5 dB

Alternate Channel Selectivity: 

Wide : 60 dB

Narrow :  90 dB

FM Stereo Separation

1 kHz :  55 dB

50 Hz -10  kHz  :  40 dB

Frequency Response 20 Hz - 15 kHz:  ±0,5 dB

Image Rejection Ratio (98 MHz):  82 dB

IF Rejection Ratio (98 MHz):  110 dB

Spurious Rejection Ratio (98 MHz):  105 dB

AM Suppression Ratio:  76 dB

Subcarrier Suppression Ratio: 70 dB

Output Level/Impedance (1 kHz ):  0,6V/3,3 k Ω

MW Tuner Section

Tuning Frequency Range:  530 kHz - 1610 kHz

Usable Sensitivity:  10 µV (350 µV/m)

Signal-to-Noise Ratio:  52 dB

T.H.D.  0,3%

Image Rejection Ratio:  40 dB

Selectivity (IHF):  25 dB

Output Level/Impedance (400 Hz 30% Dev):  0,18V/3,3 k Ω

LW Tuner Section

Tuning Frequency Range:  153 kHz - 281 kHz (1 kHz step)

Usable Sensitivity:  17 µV (800 µV/m)

Signal-to-Noise Ratio (30% Mod; 1 mV input):  50 dB

Total Harmonic Distortion:  0,5%

Image Rejection Ratio:  35 dB

Selectivity(IHF):  30 dB

Output Level/Impedance (400 Hz, 30% mod):  0,18V/3,3 k Ω

General

Power Consumption:  13 W

Dimensions (W x H x D):  440 x 78 x 317 mm (17-5/16" x 3-1/16" x 12-1/4")

Weight:  3,5 kg (7,8 lb)

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