| Title | Value |
|---|---|
| DRIVE | DRIVE |
| Type : | Direct-drive |
| Motor : | Quartz-Lock HALL DC |
| DC 24V / 600ma | |
| Starting torque : | 1kg /cm |
| Locking torque : | 500g /cm |
| Servo : | PLL + FG |
| Platter : | 31cm / 1,8kg diecast aluminium |
| Inertial mass : | 230kg /cm2 |
| S/N ratio : | 62dB (JIS) |
| Wow & flutter : | 0,025% (WRMS) |
| Pitch accuracy : | ± 20ppm |
| TONEARM | TONEARM |
| Type : | S-shaped, static balance, 4-point gimbal support |
| Effective length : | 24,2cm |
| Offset angle : | 21°15' |
| Tracking error : | -1°...+2°30' |
| Overhang : | 15mm |
| VTA : | ± 4mm with 3-point locking |
| Anti-skating system : | hanging wire with roller and weight |
| Friction : | 7mg (vertical) |
| 7mg (horizontal) | |
| Armbase : | zinc diecast with brass shaft |
| Cartridge weight : | 3g...12g |
| Supplied headshell : | 9g diecast aluminium |
| Output cables : | Neglex 2496, dual cylinder, low-impedance |
| General | General |
| Auto-stop system : | CdS photo sensor + solenoid |
| Enclosure : | compressed particle board |
| Finish : | ebony style PVC |
| Dustcover : | 1,1mm thick acrylic |
| PC : | 9W |
| Dimensions : | 47 x 15,5 x 37,8cm |
| Weight : | 11kg. |
| List price : | 59,000¥ (1978) |
Yamaha YP-D71
october 1978
1979
Mid-end but refined follower of the YP-D8 and YP-D10, the YP-D71 has everything almost any mid-end japanese turntable had by 1978 - except it is much prettier than most.
The motor's circuit uses FG servo with a Quartz PLL servo locking to compare phase shifts between the oscillator and the generator. This widespread, common and even banal system here allows to track up to 500g /cm load with no speed changes.
The motor itself is coreless & slotless, allowing a 1kg /cm starting torque.
The tonearm rests on a four-point gimbal support with independent V and H frames ; friction amounts to a low 7mg for both planes.
The fairly long wand (24,2cm effective) is filled vibration-proof material.
Otherwise, zinc diecast base with brass shaft, 3-point locking of the ±4mm VTA adjustment, low-impedance output cables, auto-stop with CdS / LED contactless solenoid and 1,1mm thick acylic dustcover.
A real D71 here.
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