preamplifier which raised the nakedness property of amplifier in order to
realize transmit error zero.
It develops by C-Z1 and the circuitry is
polished up based on the super linear circuit which solved the nonlinearity of
It returned to the origin of the amplifier design of
"amplifying an input signal faithfully and taking out as an output signal", and
in order to acquire the property which was excellent without applying NFB, the
super linear circuit which cancels the nonlinearity of a transistor with the
nonlinear transistor in the reverse mode is developed and adopted.
becomes unreturned amplifier and the time delay which returns an output signal
to an input stage by NFB is suppressing the instability of a high region and the
occurrence mechanism of TIM distortion which are generated owing to.
1a, this super linear circuit is used for two pieces and one flat amplifier in
the equalizer stage per channel, if total two channels, six pieces are used, and
it has unreturned composition which does not have a NFB loop in a signal system
from an entry point to an outlet.
Since a super linear circuit is
considered to be a current amplifier, it has the property to determine a gain by
the value of load resistance. This special feature was used and the current
equalizer which gave the RIAA property to the load intensity is adopted.
equalizer element which consists of a capacitor and a resistor was connected, and forming an equalizer amplifier with a RIAA property has realized the maximum
permissible input to the extent that it does not think in the conventional CR
With unreturned amplifier, the stability of DC voltage in an
outputting point becomes important.
In C-Z 1a, in order to suppress a
variation of a middle point voltage, the double locked servo regulator who
stabilizes still more nearly doubly the supply voltage of the super linear
circuit stabilized once, and locks it is employed, from an input to an output is
constituted from a whole page hardwired connection, and the robustness is
In order to prevent the ill effect by the magnetic substance,
it has a non-magnetic-material structure which adopted aluminum material as all,
such as a chassis and a frame.
The eddy current generated according to the signal current and ripple current was canceled, and the glasscase power-source capacitor which realizes the good tone quality of an omission is adopted.
Non-magnetic material and a brass cap carbon resistor are used
for a lead-wire drawer part.
To the printed circuit board, an intensity
is high, and glass epoxy excellent in the RF property is adopted.
Furthermore, 280micro oxygen-free-high-conductivity-copper foil was used for
the equalizer substrate, and direct current resistance and an inductance are
The film capacitor for newly developed original equalizer
elements by the compound structure of a polystyrene and polypropylene is
Reliable oxygen-free-high-conductivity-copper material is used
for the product-line material of a signal system.
The pin plug code for
an interconnection of a star-quad structure
(oxygen-free-high-conductivity-copper line) is equipped standardly.
mass double insulation power cord is adopted.
||A unreturned stereo preamplifier
Tuner: 150mV / 50kohm
Cartridge load capacity: 100, 200
Cartridge load resistance: 25, 50, 100kohm
150mV / 50kohm
Tape Play: 150mV / 50kohm
|An Output voltage/impedance
||Tape Rec: 150mV / 1kohm
Output: Rate 1V,
||60W (Electrical Appliance and Material
||Power-switch interlock: Three lines, Total
Power-switch un-interlocking.: Two lines, Total 200W
||Width 220x height 185x depth of 454mm