เครื่องเล่นเทปรุ่นใหญ่ 3 หัวเทป AKAI GX-F90 เสียงดีมาก คุ้มราคา หายาก สวยพร้อมใช้ Made in Japan
เครื่องเล่นเทปรุ่นใหญ่ 3 หัวเทป AKAI GX-F90 เสียงดีมาก คุ้มราคา หายาก สวยพร้อมใช้ Made in Japan
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AKAI GX-F90
¥ 128,000 (around 1981)
Commentary
A 3-head stereo cassette deck equipped with a Super GX head.
The super GX head is adopted as a head.
This head is a REC / PB combination type head that can be monitored at the same time by
using the newly developed High Bs and High μ ferrite materials and making the recording
gap (4μ) and playback gap (1μ) independent. increase.
Compared to metal heads such as Sendust, it is superior not only in terms of sound quality
such as frequency characteristics, distortion factor, and dynamic range, but also in terms
of secondary characteristics such as wear resistance, less noise, and less dust. But it
has excellent characteristics.
A highly reliable DD capstan 2-motor system is used for the drive system to achieve
stable rotation performance and long-lasting excellent initial characteristics.
In particular, the DD motor for driving the capstan is equipped with Akai's original brushless
FG servo DC motor that achieves high performance in all aspects such as stability, quietness,
rotation accuracy, torque, etc. The phase full-wave drive system and the fast responsive FG servo circuit have obtained excellent rotation accuracy with a large torque and a small amount
of wow and flutter components. Moreover, because it is brushless, there is no brush wear or
carbon adhesion, and the SN ratio is greatly improved.
The IPLS (Instant Program Locating System) which a play head detects the boundary between
a signal part recorded on a tape and a non-signal part and automatically enters a play state
is carried.
With the GX-F90, various tape plays are possible by using a memory switch, repeat switch,
and IPLS switch. Memory play that can be cueed with the tape counter 000, and playback / rewind / playback of one side of the tape can be performed. You can also enjoy repeat play
that automatically repeats, and memory repeat play that combines the memory function
and repeat function.
Furthermore, if the repeat switch and IPLS switch are operated at the same time,
continuous playback of the same program is possible.
Taking advantage of the mechanism of 2 motor systems, the operation button adopts
a feather touch type direct function change mechanism in which the timing of each operation
is controlled by the IC logic circuit.
It is equipped with a high-precision 24-segment digital bar meter that can be switched between
a VU meter and a peak meter with a single switch.
The recording cancel mechanism which can quickly cancel a part recorded by mistake during
an air check is carried.
When you press this switch, the tape is rewound to the head position of the part that was
recorded by mistake and automatically enters the recording standby (pause) state.
The ADR system original with Akai is carried, the sound-recording equalizer changes automatically according to the frequency band and level of an input signal, and the distortion
by the demagnetization action in a high region is prevented.
The 4-position tape selector is carried and the bias equalizer suitable for each tape type
is combined, so the performance of a tape can be brought out with one touch.
The operation of the tape selector is LN, LH, CrO on the tape position indicator, respectively.
2 , METAL is displayed.
The Dolby NR system which effectively improves the hiss noise peculiar to a tape is carried.
Since the GX-F90 is a double process Dolby NR with independent circuits for recording and
playback, it is possible to monitor the Dolby effect while recording.
Furthermore, since it is equipped with a recording calibration mechanism with a built-in 400hz
oscillator that can adjust the recording / playback level for each tape used, the Dolby effect can
be fully utilized.
When recording FM stereo broadcast with Dolby NR, the MPX filter switch is carried in order
to prevent Dolby NR from malfunctioning with a 19kHz pilot signal.
Recording / mute mechanism convenient for air check and dubbing, input level control for
two microphones / lines independently, timer start mechanism for answering recording / alarm
playback, output volume for headphone volume control, one microphone It is equipped with
a mono microphone mechanism that enables monaural recording.
It is equipped with a remote control terminal that can be connected to an optional remote
control unit.
Model rating
Model Stereo cassette deck
Tape speed 4.75cm / s
Wow and flutter 0.03% WRMS (JIS)
Frequency characteristic 25Hz to 15kHz ± 3dB (LN tape)
25Hz to 17kHz ± 3dB (LH tape)
25Hz to 17.5kHz ± 3dB (CrO 2 (SA) tape)
25Hz to 21kHz ± 3dB (metal tape)
Distortion rate (1kHz, 0VU) 0.6% (metal tape)
SN ratio (metal tape) 62dB (3% THD level WTD)
When using Dolby NR: 5dB improvement (1kHz), 10dB improvement (5kHz or more)
Recording bias frequency 100kHz
head Recording: Super GX recording head x1
Playback: Super GX playback head x1
Erase: Double gap erase head x1
motor For capstan drive: Brushless FG servo DC motor x1 For
reel drive: DC motor x1
Early winding time 60 seconds (when using C-60 tape)
Input sensitivity / impedance Line: 70mV / 100kΩ or more
Mic: 0.25mV / Compatible impedance 600Ω
Output level / impedance Line: 0mV to 410mV (maximum 0VU) / 20kΩ or more
Headphone: 0mV to 100mV / 8Ω
Power-supply voltage AC100V, 50Hz / 60Hz
power consumption 38W
External dimensions Width 440 x Height 105 x Depth 370 mm
weight 9.8kg
Attached Connection code x2
Driver (for recording / playback level adjustment) x1
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