ขายเครื่องเล่นแผ่นเสียง CEC ST-930 รุ่นใหญ่ หายาก เสียงดีพร้อมใช้งาน Made in Japan
ขายเครื่องเล่นแผ่นเสียง CEC ST-930 รุ่นใหญ่ หายาก เสียงดีพร้อมใช้งาน Made in Japan
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CEC ST930
With straight arm: ¥135,000 (released in 1989)
With S-shaped arm: ¥135,000 (released in 1989)
Armless (compatible with SME tonearms): ¥110,000 (released in 1989)
explanation
A record player developed as the culmination of CEC players.
The drive motor adopts a newly developed 3-phase brushless FG servo motor.
In order to reduce the occurrence of cogging, methods have traditionally been used to weaken
the magnetic force in the motor or to separate the rotor magnet from the stator. However,
this method reduces the efficiency and torque of the motor. The ST930 adopts a structure in
which the coils of the stator are unevenly distributed, which reduces the synthetic cogging
force during rotation without weakening the magnetic force of the motor, and achieves powerful
torque and smooth rotation by extremely shortening the cogging cycle.
It adopts a double suspension structure.
A primary shock absorber consisting of a three-layer structure of SUS304 stainless steel spring
supported by foam CR and chloroprene rubber wrapped around it is provided between
the aluminum die-cast board and the underboard, and a large rubber insulator is installed on
the underboard as a secondary shock absorber.
The primary shock absorber suppresses vibration from the internal mechanism and the fine
blurring of the outermost rubber due to sound pressure from the speaker. And vibrations that
cannot be absorbed here and vibrations from the floor are absorbed by the secondary shock
absorbers.
It is made of 3.5kg aluminum die-casting board, which has high rigidity to reduce howling.
In addition, in order to suppress vibrations from internal mechanisms such as phono motors,
LR damper sheets are installed on the back of the board as damping materials. This sheet is
a material that demonstrates excellent vibration damping properties when attached to vibrating
metal plates. Coupled with the newly designed double suspension, it effectively suppresses
and absorbs various vibrations and improves the signal-to-noise ratio.
The motor part is separated from the main chassis and the belt drive system is deliberately
adopted to pursue vibration-free.
In the belt drive system, the vibration is absorbed by the belt, so that the vibration from the
motor transmitted to the turntable can be shut out. In addition, the bearings of the ultra-abrasive
shaft of the turntable are made of large oil-less metal bearings to rotate the heavyweight
turntable smoothly.
The power control part, which is responsible for the rectification and operation of the AC
power supply, is separated from the main unit. This reduces the disturbing vibration of the
rotating system and the negative impact of the power supply on the drive mechanism.
The turntable is made of 2kg aluminum die-casting, and by attaching an LR damper sheet,
which is a special anti-vibration material similar to the main cabinet, on the back side of the
body cabinet to shut out vibrations caused by the amplitude of the record and the slightest
vibrations generated by it.
The tonearm adopts a high-precision gimbal support tonearm.
The vertical axis of the tonearm adopts a single-point support system, with a high-precision
micro bearing (ABEC-7) placed at the top as a fulcrum and a weight balance at the bottom.
In addition, in order to minimize the shaking, it is designed to maintain balance at the farthest
point from the fulcrum. This allows the fulcrum bearing to be pressed downward with a moderate
weight, allowing smooth operation to be achieved with less rattling. In addition, a special
fixing screw is used on the horizontal axis to apply appropriate pressure to the pivot bearing,
so that even the slightest gap is not missed.
In addition, the oil dumping method using silicone oil with special viscosity absorbs the
extremely small gaps that may theoretically occur.
By placing the fulcrum bearing and horizontal pivot bearing on the vertical axis with reduced
rattle in a straight line to the tonearm pipe, respectively, rattling at the needle tip is eliminated.
The headshell is made of ADC12 aluminum alloy die-cast headshell.
In addition to 33 1/3 and 45 rpm, it is also compatible with 78 rpm.
In addition, the tonearm body is height adjustable, allowing you to freely select the
cartridge according to the recording and listening environment.
The turntable seat is made of the latest materials containing metal fibers such as stainless steel,
silver, and copper. This has excellent conductivity, so static electricity can be suppressed, and
the use of 40mm long fibers gives it high dust resistance.
In addition, it adopts a double sheet shape with a donut-shaped sheet that avoids the convex
part of the outer circumference of the record and the record label on top of the normal sheet,
so that only the flat part of the record record is stably received. This adherent shape and double
seat with rich cushioning properties improve vibration damping.
All output cables, from the lead wire of the tonearm to the phono cable, are made of OFC
cables.
The plug is also 24K machined.
It uses feather touch controls.
It is equipped with an LED indicator that allows you to see the rotation speed of the turntable at
a glance.
Dust cover is included.
Model rating
Model Record player
< Phono Motor Department>
Drive system Belt drive system
motor 3-phase brushless FG servo motor
turntable Made of 32cm aluminum die-casting, 2kg, 6.4mm thick
Moment of inertia 280 kg/cm2
Rotation speed 33 1/3, 45, 78 rpm
Wow flutter 0.008% WRMS (FG direct reading)
Signal-to-Noise Ratio 85dB or more (DIN-B) 50dB
or more (DIN-A)
Startup characteristics Less than 1/2 revolution (33 rpm)
< Tonearm Section (CST9021) >
Tone Oil dump and gimbal support systemStatic balance type straight arm
Effective Length 229mm
overhang 15mm
Offset Angle 22 ゚
Tracking Error Angle -1.1 ゚~+1.9 ゚
Needle pressure adjustment range 0~3g (0.1g steps)
IFC Adjustment Range 0～3
Fit cartridge dead weight 4g~9g (including screws and nuts)
< General >
power AC100V、50Hz/60Hz
Power consumption 5W
Dimensions Body: Width 485 x Height 145 x Depth 350mm
Control Box: Width 100 x Height 85 x Depth 220mm
weight Body: 9kg
Control box: 1.2kg
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