||120,000yen(around the 1982 time)
Control amplifier which carries the tone quality
which kept being polished, and a variegated functionality in a symmetrical
performing a perfect push pull stream composition to the whole page from
MC head amplifier to flat amplifier -- the improvement in a nakedness property,
and the reduction in NFB a TIM it is considered as the Low-TIM design which
banishes a dynamic distortion at first.
MC head amplifier constitutes the perfect push-pull circuit of a single-sided
channel 9 stone stream composition from the first rank of a super-low-noise
transistor 2 parallel push pull to a SEPP output stage.
Moreover, phone amplifier has perfect
push-pull-circuit composition influenced by the impedance variation of the
input/output, and the metal film resistor of less than 1% of an error and less
than 2% of polypropylene capacitor are adopted as an equalizer element.
Flat amplifier is an original whole page push-pull circuit, and is used
as pure Class-A amplifier.
The two-step Darlington scheme
especially according to a super high fT (200-250MHz) power transistor in a final
stage is adopted.
The Phono selector carries man-month cartridge loading
selector of three positions other than MC head amplifier position.
right-and-left independent tone control, the mutual dubbing functionality of the
two decks, a two-step switchover loudness control, and two outputs switch, and
functionalities, such as a High/EQ Subsonic car filter, are carried.
The tone switchpoint which bypasses a tone arm and can attain simple-ization is carried.
The 70-micrometer printed circuit board which made thickness of the Copper foil twice usual is adopted. Moreover, the improvement in a tone quality is aimed at by adopting an oxygen-free-high-conductivity-copper ship and a coaxial cord as a signal path.
Furthermore, quality parts, such as a low scaling-factor foil capacitor which reduced source impedance, a copper plating chassis, and a power cord of 15A, are adopted.
||Stereo control amplifier
||Phono1 man-month: 2.2mV / 27kohm, 47kohm,
Phono2 man-month: 2.2mV / 47kohm
Phono1 MC: 0.12mV/100 ohms
High SFT Level: 150mV / 40kohm
|An Output power/impedance
|Cross modulation distortion
|SN ratio (IHF-A)
||Width 474x height 172x depth of 266mm