||71,000yen(around the 1973 time)
The record player which adopted the direct-drive
The direct-drive scheme using the DC servo motor by an
electronic-circuitry control system is adopted as a drive system.
turntable is a product made from aluminum die-casting, and the large inertia
moment is taken with 260 kg/cm, and also the bearing precision has adopted what
has ±2/1000 highmm, ±1/1000mm or less of roundness, and precision.
The meter scheme of electronic-circuitry adoption is adopted as 1 / 3 or 45rpm
velocity checking. The zero point adjustment on this meter is proofread so that
it may be in agreement with a constant-speed degree rotation of a motor using a
frequency counter, and it is pursuing the accuracy more.
Moreover, 33 1 /
speed control organization in which 3 or 45rpm became independent, respectively
is carried, and ±6% of fine tune is possible to a convention velocity.
Static balance type MA-202L is carried in the tone arm.
This tone arm has obtained the sensitivity which was combining the very
precise Ain Guller type bearing and the pivot original with micro in the
rotation partial bearing, and was excellent in it. Moreover, it finishes
with the pipe quality of the material, and a low-pass vibration and local
resonance are stopped by the using of the damping material etc. in consideration
of the precision. The height coordination serves as a one-touch lever type
within the limits of 6mm.
The shock at the time of a contact of a record and the needle point is
prevented by latency operation of an oil dumping type arm lifter. Moreover,
the inside-force-canceller organization original with micro is carried.
of man-month type cartridge are carried in the cartridge.
supports compact-disk-4 by exchanging the needle point.
Focusing on a
1mm punching metal, the cabinet is using the sole plate about 10mm thick, and is
suppressing the vibration by acoustic feedback. Moreover, the aluminum
die-casting panel is used for finish.
Furthermore, the possible rubber
vibration insulator foot of a height coordination is adopted for the measure against a howling.
The revolving front door which served as the part TAP
box is prepared.
The DIN connector is adopted as an output connector.
||DC servo motor
||33 1 / 3 or 45rpm
||The product made from 31cm aluminum
||0.04% or less
||58dB or more
|<Tone arm part>
||A static balance type, MA-202
|The maximum tracking error
||1.5 degrees or less
|Conformity cartridge self-weight
||4g-16g (with an additional wait 9g - 21g)
|Stylus-force variable span
||man-month type (M-7000/e)
|Frequency characteristic span
||5Hz - 45kHz
||3.5mV (1kHz, 3.54 cm/s)
||45kohms - 50kohm
|The optimal stylus force
||0.3x0.8mil ellipse diamond needle
||30x10 to 6 cm/dyne
V-7000/F (the object for compact-disk-4, 9,000yen)
||Width 498x height 171x depth of 422mm