JVC QL-10

1 9 7 8 1978
1 9 8 0 1980

Peak of the hi-fi years : vinyl rules.

The QL-10 is a TT-101 drive with a Victor-made base and Victor's own UA-7045 tonearm.

The Double Bi-Directional Servo, as its name suggests, adds to a conventional FG Servo a second quartz-lock servo section loop outside of the drive itself.

The motor itself is a coreless DC with 180 slots where the servo is applied on both positive and negative areas to avoid speed overshooting when started or when correcting speed.
The entire technical description is available on the TT-101 page.

The base seen here from US and DE catalogs is the big and 3,3kg heavy CL-P1 Victor wood veneered plinth.
Victor's CL-P bases are made of four layers of high-density particle boards and three layers of special inorganic material.

If both elements were available separately in Japan, the integrated QL-10 was an export-only item.

JVC QL-10, image 1 JVC QL-10, image 2 JVC QL-10, image 3
JVC QL-10 specifications
Title Value
DRIVE DRIVE
Motor : FG detecting Coreless DC Servo
Drive type : direct-drive
Servo type : Quartz Lock +/- Servo
Speeds : 33 1/3 & 45rpm
Pitch range : ±6Hz from 440Hz
Speed change : electronic / electronix switches
Rise time : 0,6s (33 1/3 rpm ; 60° turn)
Wow & flutter : 0,020% (WRMS)
S/N ratio : 65dB (IEC)
75dB (DIN-B)
Stating torque : 1,8kg/cm
Overshoot : within 2%
Load characteristic : 0% under 120g
Drift characteristic : 0,0001%/hour
0,00003%/°C
Source variation within ±10V : unaffected
Quick stop : within 1s
Deviation from nominal rpm : within 0,002%
Platter : 31,6cm / 2,05kg
aluminium diecast
TONEARM TONEARM
Type : statically balanced
New Gimbal Support on on Tracing Hold system
Effective length : 24,5cm
Overhang : 15mm
Tracking error : +1°48'...-1°31'
Tracking force : 0...3g (0,1g steps)
Cartridge weight : 12...32g (headshell incuded)
Arm elevation range : 40...60mm
Operation : manual
GENERAL GENERAL
Dimensions : 51 x 41 x 19,7cm
Weight : 19,5kg.
page online since : february 2009
page updated : january 2011
page type : LGT / KNB
page weight : 204.55 Kb / 0 b
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