AKAI GX-280D

Commentary

This 3-motor, 3-head stereo tape deck adopts a direct capstan drive motor with servo circuit and an GX head.

We have adopted a newly designed direct capstan drive motor with servo circuit for capstan drive in pursuit of higher performance.
It is designed to detect and amplify the motor speed purely electrically and compensate for changes in the rotational speed by means of a servo circuit, by integrating an Eddy Current Outer Rotor Motor, a control winding and a pulse generator for speed detection into an integrated structure. It is able to maintain a constant rotational speed at all times and achieves very stable tape running.
In addition, belts, idlers, flywheels, etc. are layered, and the wow and flutter are held down by a simple mechanism.
We have adopted two Eddy Current Outer Rotor Motors for driving both supply and take-up reels.

Uses GX (Glass & X' Tal Ferrite) head.
By applying crystal ferrite (single crystal ferrite) developed for VTR and various ultra-precision processing technologies for VTR head to audio head, this head uses single crystal ferrite with superior characteristics to conventionally used permalloy as core material for the first time in the world. In addition, the periphery including gap is hardened with glass.
The surface of this head is made of glass and crystal ferrite, so that dust does not adhere to it and it does not wear. Moreover, the "focused field" provides excellent frequency characteristics.
In addition, there is no need to replace or clean the head, and it has a Longraima which is 100 times larger than the conventional permalloy head.

Equipped with auto stop / auto shut-off function.
When the tape is fully wound and reaches the end, the automatic shut-off lever will stop the tape from running.
When the auto shut-off switch is pressed, the power of the whole unit is turned off when the shut-off lever is returned.

You can use S. R. T. tape (Super Range Tape).
By pressing the S. R. T. button, you can demonstrate the performance of a low-noise tape.

Sound-on-sound recording is possible, and it is possible to record one person duet making use of language, practice of musical instrument performance and double recording.
In addition, since the microphone and line inputs are independent, mixing recording is possible.

Equipped with a direct function change mechanism that automatically enters the selected mode simply by pressing the Play or Reverse button in the fast-forward / rewind state.

Model Rating

Type	Stereo tape deck
Track system	4-track 2-channel stereo / monaural system
Maximum use reel	No. 7
Tape Speed	19cm/s, 9.5cm/s (± 0.5%)
Wow and flutter	0.08% RMS or less (19cm/s) 0.12% RMS or less (9.5cm/s)
Recording (playback) compensation characteristics	NAB characteristics
Frequency characteristic	30 Hz to 24,000 Hz ± 3 dB (19cm/s) 30 Hz to 19,000 Hz ± 3 dB (9.5cm/s)
Distortion factor	1.5% or less at 1000 Hz, 0 VU
S/N	50 dB or more
Erasure rate	70 dB or more
Crosstalk	Mono : 70 dB or higher Stereo : 50 dB or more
Recording bias frequency	100kHz
Heads	4-track stereo / monaural recording / reproducing head 4-track erase head
Motor	2-speed servo control outer rotor motor (1 for Direct Capstan Drive) 6 Pole Eddy Current Outer Rotor Motor (one each for feed and take-up reel)
Fast forward / rewind time	60/75 seconds (350m tape specification), 60/50Hz
Recording time	2-hour stereo recording (9.5cm/s, 370m tape specification)
Output jack	Line (2 systems) : 1.23 V (0 VU) / 100 Ω (optimum load impedance : 20k Ω or more) Headphone (1 system) : 30 mv ~ 40mV/8 Ω
Input jack	Microphone (2 systems) : 0.8mV/10k Ω Line (2 systems) : 150mV/150k Ω
DIN jack	0.4V/50mV (High) 5 mv (Low) / 68k Ω
Semiconductor used	Transistor : 39 Diode : 32 pcs Linear ICs : 2 units
Power supply voltage	100 VAC ~ 240 V, 50Hz/60Hz
Power consumption	33W ~ 130W
External dimensions	Width 435x Height 460x Depth 260 mm
Weight	21kg
Attachment	1 x 7 Empty Reel 1 x DR-111 connection code One sensing tape Two spare fuses