Audio Database

The

MICRO DD-10 99,800yen(around the 1974 time)

Description
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The direct-drive player which adopted the power transformer isolation structure.

The structure which separated the power transformer from the main unit is adopted, and total S/N as a player system is improved. According to this outer power transformer structure, the influence of the leakage flux to the bad cartridge and low-power-output type cartridge of a shielding was also suppressed few, and has obtained a clearer play sound.
Moreover, two outlets for AC are arranged.

The 20 pole 60 slot brushless DC servo motor is adopted as a motor part, and the outstanding property has been acquired.
Moreover, the large-sized turntable made from aluminum die-casting of inertial-mass 330 kg-cm2 is adopted as a turntable, with original casting, density is equalized and the deflection in 900 rotations by a balancing machine is suppressing within 2g to the average of 4g of a general high-class player.
The high-density sheet (315g and about 1.2g per cm2) was adopted as the rubber sheet of a turntable, and the vibration is prevented.

The tone arm serves as a universal type static balance type.
In order to pull out the tracing capacity of a cartridge, the functionality of a tone arm is reexamined,The high-precision pivot and the original Ain Guller type bearing were combined with the perpendicular bearing part of the rotation fraction, and the performance with an initial shock level perpendicular sensitivity of 10mg or less has been obtained at the level bearing part using the radial type bearing to two upper and lower sides.

In order to check the longitudinal balance of an arm with the height of a using cartridge, the hericoid type arm height adjustment mechanism is carried. It can tune finely in 6mm according to this adjustment mechanism.
Moreover, in order to carry the variable type inside force canceller corresponding to a stylus force, and for the amount of cancellations to face according to the record perimeter and inner circumference according to the original variable type structure corresponding to a stylus force and to change,The right-and-left unbalance of the stylus force by an inside force can be canceled, and the tracing capacity of a cartridge is raised.

The arm lifter makes smooth the contact desorption of a record side and the needle point in the latency operation by an oil dumping type.

The head shell had adopted the product made from aluminum die-casting with few vibrations, the gilding treatment was performed to the connector pin, and poor contact is prevented. Moreover, the canting coordination screw of the head shell is prepared in the head nowait-lock connector part at the leading end of an arm, and a perpendicular coordination is possible.

A rotational-speed switching is an electronic formula by a microswitch, and a fine tune can be performed in }6% of span at each velocity.

The cabinet has adopted the dual structure of a die-casting frame and the solid base, and the measure against a howling is also checked.
The player leg is equipped with the large-sized absorber, and a height coordination is possible.

The stroboscope of the mirror type which has arranged the precision stroboscope on the back side of a turntable is carried.

Output code serves as a low capacity type of 50 pF/m, suppresses the influence on a high region property, and also supports 4ch play.

Cabinet
Outer Motor

Rating of a mode
Form Record player
<Turntable part>
Drive system Direct-drive scheme
Motor 20 pole 60 slot DC servo motor
Rotational frequency 33 1 / 3 or 45rpm
Rotational frequency fine-adjustment span }6% (33 1/3, 45 independent coordination)
Turntable The product made from 31cm aluminum die-casting, 2.4kg
Rotation unevenness 0.03% or less
S/N ratio 62dB or more
<Tone arm part>
Form Static balance type
Effective length 237mm
Overhang 15mm
Conformity cartridge self-weight 4g-11g
11g-17.5g (option sub-wait A, 500yen)
17g-22g (option sub-wait B, 1,000yen)
Stylus-force variable span 0-3g (one rotation)
<Synthesis>
An attached organization Arm height adjustment mechanism (31mm - 37mm)
Mirror type stroboscope
Arm elevation switchpoint
Power source AC100V, 50Hz/60Hz
Power consumption 5.4W
Dimensions Width 470x height 133x depth of 340mm
Weight 13kg (it is an included about a power transformer)