Description: For sale a vintage JVC / Victor model QL-7 direct drive Quartz Lock turntable in good working order. Turntable keeps speed well, no issues and will come with working cartridge. DESCRIPTION: A record player equipped with a turntable TT-71. Quartz Lock DD Turntable TT-71 sold as a stand-alone product is mounted on the turntable part. The drive motor is equipped with an FG servo system of full circumference integral detection type with torque of 1 kg ・ cm or more. This speed detection mechanism consists of a ring magnet, a magnetic disk with 180 slots (FG yoke), and 180 power generation print coils (FG substrate). Together with the motor, when the magnetic disk makes one revolution, 180 pulses are generated for each of 180 coils. Therefore, the total detection output appears in the form of integrating the outputs of the whole circumference of 180 coils. There are few detection errors, and the absurdity of generating the cause of wow and flutter by the servo system itself can be almost eliminated. In addition, a turntable with a total weight of 2.2 kg including rubber covering has been adopted, and a quartz lock has been added to improve overall rotational accuracy. The quartz lock circuit compares the phase of the reference signal based on the accurate oscillation frequency of the crystal with that of the signal sent from the speed detector of the motor. When there is a difference, the driving voltage of the motor is automatically changed. The QL-7 uses a sample-and-hold circuit for this part to improve the accuracy and speed of the servo response. A touch sensor system is used for the rotation number changeover switch and stop switch. In addition, a brake mechanism using an electromagnetic solenoid is linked to the stop switch so that it can stop smoothly within 1.6 seconds. The flash is powered by the oscillation frequency of the crystal, enabling accurate speed monitoring. The tone arm uses Victor's original new gimbal system, which pursues the sensitivity of the one point support system and the stability superior to the gimbal system. The tone arm also uses a chucking lock type head connector, which prevents the arm pipe and shell with anti-vibration material from rattling, and a molten metal forged head shell to further improve sound quality. The cabinet is designed to eliminate resonance and vibration by theoretical analysis and measurement of vibration loop. The foot uses a newly developed parallel isolator that incorporates coil springs and rubber into the die-cast housing. This structure reduces lateral vibration while achieving a high vibration isolation effect. In addition, this isolator is height adjustable. SPECIFICATIONS: Drive system - FG Detection Quartz Lock DC Servo Direct Drive Number of revolutions - 33 1/3, 45 rpm (Touch Sensor Electronic Switching) Wow and flutter - 0.025%(WRMS) Signal-to-noise ratio - 63dB(IEC-B)/73dB(DIN-B) Start-up characteristic - 1.4 sec. (1/2 rotation) Load characteristic - Needle pressure up to 120g 0% Drift - 0.0001%/h / 0.00005% / ° C Tone arm type - New Gimbal Support TH Method Static Balance Effective length - 245mm Arm Height Variable Range - 43.5 mm ~ 54.5 mm Cabinet finish - Rosewood tone External dimensions - Width 490x Height 181x Depth 411 mm Weight - 12.0kg Check my other ads for more quality vintage electronics.
Price: 595 USD
Location: Mississauga, Ontario
End Time: 2024-09-09T03:01:48.000Z
Shipping Cost: 75 USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Brand: JVC/VICTOR
Model: QL-7
Pitch Range: +/- 6 %
