|129,000yen(around the 1990 time)
The compact disk player which adopted 3 pole
thermionic tube as the output circuit.
Twin-Triode 6CG7 is adopted as a
cathode follower circuitry.
3 pole thermionic tube has a linear property, and the oddth jarring higher
harmonic is excellent in the capacity to pull out a music, such as few
things. Moreover, simple-ization of a circuitry is realized by the cathode
follower by which an active element is constituted from atomicity (one
The newly because of D-107U developed line transformer for
an output is adopted.
While an advanced music representation is attained,
sending stabilized also for the low-impedance load intensity by transformer join
It has succeeded in removing an analog filter harmful to a
tone quality completely by using the natural damping characteristics of a line
transformer,Thereby, the analog signal went into the thermionic tube direct, and
the circuitry after DA conversion has realized the simple circuitry of being
outputted via an output transformer.
In order to prevent the pulse
nature output at the time of the power activation of a compact disk player, the
muting circuit kept from carrying out a definite-period-of-time output is
Relay contact is used for this muting circuit, and, thereby, the
relationship between an earth line and DC line serves as an ideal output circuit
severed completely at the time of a cancel release of a muting.
digital output is eliminated in order to put into practice and investigate the
characteristic of the analog circuit which uses the thermionic tube.
Moreover, it had two lines, the variable output and fixed output by an
electric volume, and the pure lineout in which neither receives the influence
of radiation is realized.
In order to stop an extraneous vibration harmful
to a tone quality, the measures against vibration proof are taken.
optical pickup base was separated from the assembly base, and the original high
rigid nowait-lock mechanism which intercepts an oscillation for the meantime in
the combination of a special rubber damper and a coil spring is adopted.
Furthermore, it has a structure strong against an extraneous vibration by
making it into the low centroid structure of the center mounting scheme arranged
in the center.
The edit functionality convenient to record and the
fadeout functionality are carried.
Moreover, the time fadeout functionality
which can perform a time specification is equipped, and fadeout time can be set
up per part for a maximum of 99 minutes.
If time comes, a fadeout will be
carried out automatically and it will return to the first Output voltage after
that and automatically.
The pre heating switchpoint by which the heater
of the thermionic tube is warmed beforehand is carried, and the operation
stabilized for a short time is obtained.
According to the luminosity of
the room, the intensity control and the erasable display-device adjustment
functionality of function-logic-diagram display tube are carried.
gilding termination of a contact loss is adopted.
||Compact disk player
||Semiconductor laser pickup
|Quantifying bit number
||16-bit linear-line type quatization
||20Hz - 20kHz, ±1dB
|Wow and flutter
||Below a limit-of-measurement value
||Width 470x height 147x depth of 342mm