HYDRAULIC REFERENCE
The Hydraulic Reference Turntable employs a low-speed, recoil start synchronous motor on a double-deck spring mounting driving the platter via a neoprene rubber belt, thereby providing complete vibration insulation. The main bearing incorporates a silicone fluid well rotating at the same speed as the platter, fine speed control being provided by a static vane immersed in the fluid. Platter speed is therefore determined by the A.C mains frequency, which is effectively constant, and the viscous fluid flow onto the vane, also effectively constant. Speed changing (45 r.p.m. and 33.3 r.p.m.) is accomplished by moving the drive belt from one motor pulley to the other and a neon-lit stroboscope is provided for accurate speed setting. In order to eliminate completely any mechanical shock to the turntable, on/off switching of the drive motor is accomplished by means of a reed switch. The Hydraulic Reference Turntable also has provision for the unique sweep arm and stylus brush.
Specifications
Platter 305mm diameter machined from a solid billet of aluminium, and fitted with six 24k gold plated inertia platter weights. The record is supported on neoprene pads, thereby reducing rumble and induced static to an absolute minimum.
Plinth CNC machined marine grade plywood faced off with black acrylic.
Isolation Feet Aluminium fitted with cork/rubber damping pads.
Lid Clear acrylic.
Main bearing Slim sectioned ball-ended ground and polished silver steel spindle running onto a ceramic ball bearing and hardened steel thrust plate. Fitted with three poly-sibrilating damping rigs
Motor Single-phase synchronous, recoil start.
Tonearm Boards Available for most new and classic arms.
Power requirement 115vac or 240vac, single-phase, 50 Hz or 60Hz.
Speeds 33.3 and 45 r.p.m.
Speed Control +/- 2% of nominal
Speed Indication Neon-lit stroboscope geared up 6:1 to give a 6 degree reading for a 1 degree variation in platter speed
Dimensions
Width 440 mm
Depth (lid closed) 420 mm
Depth (lid open) 520 mm
Height (lid closed) 160 mm
Height (lid open) 500 mm