||PL-7: 32,800yen(middle of the 1960s)
|PL-7U:26,600yen(middle of the 1960s)
The stereo player system which carries auto
mechanisms, such as an oil dumping arm elevation organization.
By the light lever operation of one-touch, on/off of a switchpoint, the
idler, and the auto mechanism that performs rise and fall of an arm simultaneously
are employed. For this reason, an out-of-order to an idler, damage to a
needle, etc. by failure of a power source to cut could be prevented, and
the outage by the carelessness on the handling which tended to take place
to the existing player is reduced sharply.
Oil dumping of the arm rest is
carried out, and the oil dumping arm elevation organization in which you make it
go up and down an arm calmly by lever operation of one-touch is carried.
Since it is dumped by oil unlike the direct rise-and-fall unit which uses
only a metals, the smooth and exact operation has been realized.
hysteresis synchronous motor is adopted as a motor and the drive system strong
against a transition of a voltage is realized to the load intensity.
Moreover, the turntable made from aluminum die casting of 1.6kg of diameters
of 30cm is adopted as a turntable.
The absent-resonance static balance
type pipe arm which adopted the construction method peculiar to a manipulation
of the pivot, and was completed is adopted as a tone arm. A sub wait other than
a main wait is attached to Para at this arm, and the Direct reading of the
stylus force can be carried out with the tick mark minced by the shaft.
Moreover, the connector type head is adopted and a using of all cartridges
PL-C7 which is man-month type cartridge is adopted as a
The unnecessary vibration and the splitting oscillation are
reduced by using the quality of the material selected carefully by the form of
the needle point, the processing method of a cantilever, and the damper.
The built-in product-line scheme where lead wire does not appear from
the leading end of an arm is adopted.
Moreover, as for the interconnection
of an arm and output code, the plug jack type is adopted.
The needle is
having the peculiar structure held with the holder of the plastics, and can
perform a needle switching easily.
In order to prevent the oppression of
a howling, the thing of aluminum die casting is adopted as a panel.
There was PL-7U sold only in the mechanism fraction other than PL-7
dedicated by the cabinet.
||4 pole hysteresis synchronous type
||Diameter aluminum die-casting of 30cm 1.6kg
||0.18% or less
|SN ratio (at the time of PL-C7 using)
||40dB or more
||A static balance type with oil dumping arm
Pipe arm (stylus-force Direct-reading type)
||man-month type (PL-C7)
||0.7mil diamond needle
||20dB or more (1kHz)
||5mV (1kHz, 50 mm/s)
||2dB or less
|Direct current resistance
|Needle point compliance
||6x10 to 6 cm/dyne
|Proper stylus force
|Stylus-force variable possible span
||Diamond needle for stereos PL-N7 (2,400yen)
||AC100V, 50Hz/60Hz switching type
||PL-7: Width 526x height 230x depth of 420mm
PL-7U: Width 427x height 190x depth of 346mm