Sharp RT-1157C tape deck

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

Sharp RT-1157C tape deck

Front-Loading Stereo Cassette Tape Deck withSharp's Exclusive APSS

A great addition to any stereo component system, this front-loading stereo cassette deck offers a marvelous combination of superior performance, wide versatility and extra convenience with its Dolby Noise Reduction system, narrow-gap Permalloy head, independent bias and equalization switches and APSS device.

Performance and Features

Sharp's exclusive Auto Program Search System (APSS) for instant location of musical selections

Dolby Noise reduction system improves S/NRatio by 10 dB

Rapid-action, professional style VU meters for precise monitoring during recording

LED peak level indicator helps prevent overload distortion during recording

Individual bias and equalization switches to optimize performance with CrO₂, Fe-Cr and normal tapes

Narrow-gap Permalloy head (1,5 microns) for extended high frequency response

Full auto-stop mechanism to protect tapes and transport mechanism

Electronically controlled DC motor for extra speed stability and minimal wow and flutter

Mechanical pause control for instant, non-blurring tape start-up after aditing

Line/Mic input selector switch for improved recording S/NR

Front panel inputs for stereo headphones and microphones

Illuminated tape compartment for visual tape check

Digital tape counter for instant tape reference

CSA certified

Specifications

Type: 4-track, 2-channel stereo cassette tape recorder/player deck with built-in Dolby noise reduction system

Semiconductors: 23 Transitors; 15 Diode; 4 Ics; 3 LED

Input Circuitry:

Microphone Jacks : 6,8 k Ω

Line Input Jacks : 50 k Ω

Rec/Pb Socket : 6,8 k Ω

Output Cicuitry:

Headphones jack : 8 Ω

Line Output Jacks : 50 k Ω

Rec/Pb Socket : 50 k Ω

Tape: Philips standard compact cassette tape

Tape Speed: 4,8 cm.sec (1-7/8 ips)

Recoding System: AC bias system (85 kHz)

Erasing System: AC erasing

Fast Forward and Rewind: 100 sec. (C-60 tape)

Woa and Flutter: 0,2% [DIN] 0,09% WRMS

Frequency Response:

Normal Tape

Sharp C-60 UD : 40 - 12,500 Hz (DIN 45 511), 40 - 12,500 Hz ±3 dB

Maxelle C-60UDXL II : 40 -14,000 Hz (DIN 45 511) 40 - 14,000 Hz ±3 dB

Signal-to-Noise Ratio: 52 dB (for Normal tape, at Line IN, without Dolby NR system)

Dolby NR Effect: 10 dB (at over 5 kHz)

Distortion: 1,5%

Channel Separation: 35 dB

Erase Ratio: 65 dB

Input Sensitivity and Input Impedance:

Microphone : 0,2 mV/6,8 k Ω

Rec/Pb Socket : 0,2 mV/6,8 k Ω

Line In : 63 mV/50 k Ω

Output Level Load Impedance:

Headphones : 63 mV/8 Ω

Rec/Pb : 500 mV?50 k Ω

Line Out : 500 mV/50 k Ω

Power Source: Ac 110, 220, 240 V; 50/60 Hz

Power Consumption: 13 W

Dimensions (W x H x D): 408 x 158 x 252 mm (16-1/16" x 6-1/4" x 9-15/16")

Weight: 6 kg (13,2 lbs)

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What is stereo?