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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





JVC QL-Y3F turntable

 


Features:

Electronic Tonearm technology Teamed with Quartz Precision

E-D Servo for horizontal arm movement

Double-Servo Quartz control

Cog-free coreless DC servo motor

Electronic anti-skate control

Computerized fully automatic convenience

 

It holds its own against the most expensive turntables on the market, even comparing favourably with the sophisticated QL-Y5F from which it borrows many of its features. Yet the QL-Y3F is priced well below the level set for professional equipment of similar specs and features. Speed error is practically nil thanks to the JVC Double-Servo Quartz detection system and our coreless DC servo motor; handling convenience is enhanced by fully automatic controls identical with those of the QL-Y5F, and the problems of spurious arm movements are solved with our E-D Servo tonearm

 

E-D Servo for horizontal arm movement falls resonance

A modified version of the JVC E-D Servo tonearm is at work in this model to keep horizontal arm movements under control. As in the more elaborate QL-Y5F, the arm base contains a coreless linear motor with a horizontal velocity detection system, intermodulation distortion is never a problem, since infrasonic signals (10 Hz or lower) are remedied harmless by this arm control servo. The system also applies an optimum amount of antiskating force.

 

Cogging is banished by our coreless DC servo motor

Cogging is the tiny fits and starts exhibited in the rotation of many electric motors. Our special servo motor has no core; thus cogging is banished. Platter speed is more accurate than ever. Reliable speed accuracy is further improved by our Double-Servo Quartz control system.

 

Up front controls are designed for one-touch fully automatic operation

A capable microcomputer, contained in a programmed-to-order LSI, coordinates all circuits and controls for error-free fully-automatic operation. Push a button and the automatic mechanism takes care of the rest; platter start, cueing, lead-in, lead-out and end-of-play shutoff. The-up-front controls are light-touch sensitive - truly luxurious.

 

Other features:

Repeat for uninterrupted playback of a record

Solid one-piece headshell doesn't rattle or resonate

Height-adjustable tonearm arrangement (±3 mm)

LED indicators for speed quartz lock and record size.

 

Specifications

Type:  Coreless DC servo motor

Drive System:  Direct-drive

Speed Detection System:  Integrated FG

Servo System:  Double-servo Quartz system

Speed Change:  Electronic Switching

Wow and Flutter:  0,025% (WRMS); 0,04% (DIN)

Signal-to-Noise Ratio:  78 dB (DIN-B)

Start-up Torque:  650 g/cm

Speed Deviation:  0,002%

Load Characteristics:  0% (under 100 g loads)

Drift:  0,0001%/H

Voltage Drift:  0%

Thermal Drift:  0,00005%/°C

Platter

Size:  310 mm die0cast aluminum

Weight(with mat):  1,5 kg

Tonearm

Type:  Statically balanced electronic servo controlled arm

Effective Length:  245 mm

Tracking Error:  +1°48". -1°31"

Overhang:  15 mm

Applicable Cartridge Weight (headshell included):  14,5 - 19 g

Arm Elevation Range:  ±3 mm

Operation Mode:  Fully-automatic

General

Dimensions (H x W x D):  169 x 480 x 436 mm (6-5/8" x 18-7/8" x 17-3/16")

Weight:  10 kg (22,1 lbs)


 

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