Audio Database

The

DIATONE DP-EC5MKII
59,800yen(around the 1980 time)

Description
 
It is the full [ with an optical display ] auto player which investigated comfortable operativity.

The electronic-control full auto mechanism is adopted. Thereby, it is controllable only by pushing a manual operation button in operation of all the tone arms.
One chip LSI is adopted as a circuit and the quick exact reaction is realized.

The record size automatic detection mechanism by application of an optical system is adopted.
By this system, light is glared from the slanting upper part with a reflector, and it has the structure of leading light to a sensor from the reflector for turntable sheets. According to the size of a record, irradiation/interception of this light are done, and it changes the output of a sensor. This output is sent to a logic circuit and record size is detected automatically.
Based on this detected record size, a needle descent position and a rotating speed are determined automatically.

Since it is operating carrying the quick response function and always detecting the state of an arm lifter or an arm, it is possible to carry out auto operation from every position. Thereby, in auto operation, during a rise, also in /descent, if an arm directs the following new operation with a button, it will shift to the operation immediately.

The feather touch type which uses a microswitch is adopted as button operation.

The muting mechanism which cuts a noise is carried.

In order to suppress a vibration of a tone arm, the weight case and the anti Resonance filter which added the butyl rubber damper are adopted as the structure by a needle pressure knob and main weight. Moreover, by extending the span of a pivot, ガタ of the pipe part was lost and perpendicularity and a horizontal direction have realized high sensitivity.

The exclusive motor which became independent in the two horizontal/vertical directions is adopted as the drive of a tone arm.

Stainless steel is adopted as the quality of the material of a tone arm.

The Quartz PLL system which controls the number of rotations of a motor by the standard signal of a crystal oscillator is adopted as the drive of a turntable.
Moreover, the high torque DC servo motor of the bearing mechanism finished precisely is adopted as a drive motor.

The optical display which displays operation of number of rotations or a repeat is carried.

Newly developed MM type cartridge is adopted as a cartridge.

Wooden cabinets are adopted as a cabinet.


Rating of a mode
Form Full auto player
<Turntable part>
Drive system Direct-drive system
Motor 4 phase 12 pole Quartz PLL and a DC servo motor
Turntable The product made from outside-diameter aluminum alloy die casting of 327mm, 1.4kg
Inertial mass 230kg-cm2
Number of rotations 33 1 / 3 or 45rpm
Wow and flutter 0.028%(WRMS)
Signal to noise ratio 78dB or more (DIN-B)
<Tone arm part>
Form Static balance, universal S character pipe type
Full length 320mm
Active length 227mm
Overhang 14mm
Offset angle 22 degrees
Tracking error angle + 2.9 degrees-1.5 degrees
Needle pressure adjustment 0-3g Direct-reading type (0.1g step)
Head shell Strengthening resin fabrication containing glass fiber, 6.6g
Cartridge attachment weight range 5g-11g
<Cartridge part>
Exchange needle 3D-47M
<Synthesis>
Power source AC100V, 50Hz/60Hz
Power consumption 14W
Dimensions Width 455x height 135x depth of 382mm
Weight 8.5kg
Attachment 45 times diversion adapter
Hexagon head wrench