Sansui SR-2050E (1972–1975)
A belt-drive turntable with auto-up and auto-stop, built for precision playback with a static balanced tonearm and an MM cartridge.
Overview
The Sansui SR-2050E is a turntable made by Sansui Electric Co., Ltd. It has a 301 mm die-cast aluminum alloy platter, driven by a belt from a 4-pole synchronous motor. Speeds are 33 1/3 and 45 rpm, and wow and flutter is no more than 0.07%. The auto-up and auto-stop mechanism works through a magnet reed switch and plunger. The tonearm is a static balanced pipe type with 220mm effective length, 15mm overhang and ±1.5° tracking error. Needle pressure is set with a direct-reading adjustment from 0 to 5g. The included MM cartridge has a 0.5 mil diamond stylus and a recommended tracking force of 2.0g.
Specifications
| Turntable | 301 mm φ Aluminum Alloy Die-cast, 1.2 kg |
| Drive system | Belt drive |
| Motor | 4-pole synchronous type |
| Rated speed | 33 1/3, 45 rpm |
| Signal-to-noise ratio | 40 dB or more |
| Wow and flutter | Not more than 0.07% |
| Arm | Static balanced type pipe arm |
| Arm features | Inside for scan seller, With Lateral Balancer |
| Effective length | 220mm |
| Overhang | 15mm |
| Tracking error | ± 1.5 ° |
| Needle pressure variable range | 0 ~ 5g (Direct Reading) |
| Auto mechanism | Auto-up / auto-stop |
| Cartridge | MM Type |
| Frequency characteristic | 20 Hz to 20 kHz |
| Output voltage | 5mV |
| Crosstalk | 25 dB or more |
| Proper needle pressure | 2.0g |
| Needle tip | 0.5 mil diamond needle |
| Compliance | 7x10 -6 cm/dyne |
| Standard load resistance | 50k Ω |
| Attachment mechanism | Slow moving oil dump-type arm lifter that is linked with the power switch |
| Belt protection mechanism | With |
| Pilot Lamp | With |
| Cabinet | Walnut Open Pore Finish |
| Dust cover | Smoked Acrylic (Removable) |
| Power | 100 VAC, 50Hz/60Hz |
| Power consumption | 20W |
| External dimensions | Width 442x Height 190x Depth 352 mm |
| Weight | 8.8kg |
Design
The auto-up and auto-stop uses a magnet reed switch and plunger with zero side pressure. Needle pressure is direct-reading in 0.5g steps. The arm lifter is slow-acting and oil-damped, and it is linked to the power switch. The oil damping is temperature-resistant. Other features are a quick-read push-button speed selector, a zinc die-cast accessory base, gold-plated output terminals, a universal cartridge mount, a feather-touch start lever, a power-check pilot lamp and an anti-howling insulator. The scratch board is aluminum.
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