- Listed for sale here is a pre-owned One-Row Strobe JVC QL-A2 Quartz Lock FG Servo System Turntable. The Auto-Return feature may not be working perfectly. At the end of record, it gets returned to arm-rest position but it shifts a little out again to the record edge area. However, manually moving the tone-arm to arm-rest position, such an issue would not happen. Barring the aforementioned auto-features flaws, this turntable is fully operational with great speed accuracy given the deployment of Quartz oscillator and FG servo system. The low 0,025% wow/flutter (WRMS) of this turntable is remarkable. Missing items to be noted for this sale are dust cover, head-shell and cartridge.
Featuring an auto-return mechanism for added convenience, this QL-A2 Quartz Lock unit has also some impressive first-class specifications of 0,025% wow/flutter (WRMS) and 72 dB Signal-to-Noise Ratio (DIN-B) for dependability and accuracy.
JVC Quartz Technology
The basic circuit configuration of the QL-A2 is the same as the one used in the QL-F4. an accurate Quartz oscillator, JVC's Super Servo Frequency Generator and "no-cogging" Core-Less DC Servomotor are all included in the QL-A2. moreover, JVC's simplified circuits and advanced production techniques are abundantly used in its production, leading to dramatically improved stability and accuracy.
One-Row Strobe
With the One-Row Strobe used with the QL-A2, you can visually confirm speed accuracy. Since the LED flashes on and off, synchronized with the frequency of the Quartz, the strobe pattern is always sharp and clean. And since the frequency is changed with the speed, only one row of calibration dots is necessary for communicating the information for both 45 and 33-⅓ rpm.
Dependable Auto-Return /Shut-Off
As you move the tonearm toward the record, the platter starts to rotate in our "Quick Play Function". When the ending lead-out groove of the record is reached, the arm automatically lifts itself up, returns to its rest and shuts the power off in the "Auto-Return/Shut-Off Function". Like the QL-F4, the QL-A2 can be operated as if originally designed for manual operation since its arm may be moved manually anytime. Other features include a Reject Lever that returns the arm during play and a Cue Lever to lift the arm up and down. The tonearm features the Angular Contact Bearing Oil-Damped Cueing, insulated arm/weight interface and more.
Specifications
Drive System: Direct drive
Motor: Coreless DC type FG servomotor
Speeds: 33-⅓ and 45 rpm
Wow and Flutter: less than 0,025% (WRMS)
Rumble: more than 62 dB (IEC-B); 72 dB (DIN-B)
Speed Detection: Integrated frequency generator
Starting Torque: more than 650 g-cm
Speed Deviation: within 0,004%
Load Characteristics: 0% (with 100 g total tracking force)
Drift per Hour: 0,0001% /h
Power Characteristics: 0% (±10 % V)
Temperature Characteristics: 0,00005% /°C
Platter: 312 mm diameter
Tonearm Type: Tracking-Hold system, static balanced
Effective Length: 220 mm
Tracking Error: +3°35' - 0°43'
Overhang: 15 mm
Tracking Force Range: 0 - 3g (0,25 g division, direct reading)
Weight Range (incl. Headshell): 14,5 - 21 g (10 g headshell)
Cartridge Type: Moving magnet (cartridge body MD-1025)
Stylus: 0,5 mil. Diamond (DT-Z1S)
Optimum Tracking Force: 2 gramm
Output: 3 mV (1 kHz)
Frequency Response: 10 - 25,000 Hz
Separation: more than 25 dB (1 kHz) with test record TRS-1
Compliance
Dynamic : 10 x 10¯⁶ cm/dyne
Static : 30 x 10¯⁶ cm/dyne
General Specifications
Power Requirements: AC 110, 120, 220, 240 V 50/60 Hz
Power Consumption: 9 watts
Dimensions (W x H x D): 460 x 147 x 365 mm (with cover closed)