AKAI X-200D
¥ 78,800 (around the late 1960 s)
Commentary
Auto-reverse deck with 3-motor configuration and cross field head.
Cross-field head is used for the head part.
In the conventional recording method, a signal current and a bias current current were applied to the recording head at the same time. However, due to the influence of a wide bias magnetic field, the recorded signal is erased or weakened. This phenomenon was particularly noticeable at high frequencies.
To solve this problem, the cross-field method uses a recording head for the signal current and an external bias head for the bias current. By placing these heads at relatively displaced spatial positions, the signal recorded on the tape is not adversely affected by the bias magnetic field.
Permanent reverse by sensing tape is possible.
When the sensing tape is inserted in the middle of the tape to be used, it automatically rotates in the reverse direction when it touches the sensing pin while the tape is running. By attaching the sensing tape to the tape (coating surface) at point A and attaching it to the backing surface of the tape at point B, reverse playback between points A and B is possible.
Manual reverse is also possible. If you press the reverse button in the middle of the tape, you can switch the performance in the reverse direction.
Two ICs developed by Akai are used in the preamplifier section.
A 3-motor configuration is used for the mechanism part.
A hysteresis synchronous 3 motor is used for the capstan drive.
It uses a 2-lever system to ensure reliable operation and robustness.
Slide-type recording level control is used.
The track selector allows easy switching between stereo and monaural.
Automatic stop, automatic shut-off, automatic pinch roller I'm using a release.
Equipped with a tape lifter that works for fast forward and rewind.
The exterior uses a walnut finish.
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Model Rating
| Type | Tape deck |
| Tape speed | 4.75cm/s (1-7/8inch/s), 9.5cm/s (3-3/4inch/s), 19cm/s (7-1/2inch/s) |
| Wow flutter | 0.08% rms or less (19cm/s) 0.12% rms or less (9.5cm/s) 0.20% rms or less (4.75cm/s) |
| Frequency characteristic | 30 Hz ~ 26 kHz ± 3 dB (19cm/s) 30 Hz ~ 19 kHz ± 3 dB (9.5cm/s) 30 Hz ~ 9 kHz ± 3 dB (4.75cm/s) |
| Total harmonic distortion factor | 2% or Less (1 kHz, 0 VU) |
| Signal-to-noise ratio | 50 dB or more |
| Input sensitivity | Mic jack : 0.5 mV or more Line jack : 50 mV or more Din low : 5 mV or more High : 50 mV or more |
| Output level | Line jack : 1.23 v (0 VU) Din jack : 0.4 V |
| Recording (playback) compensation characteristics | NAB characteristics |
| Recording bias frequency | 100kHz |
| Recording level indication | Twin type VU meter |
| Recording system | 4-track stereo / monaural cross field bias system (Patent No. 451906) |
| Fast-forward and rewind time | 75 seconds each (370m tape, 50 Hz) 60 seconds each (370m tape, 60 Hz) |
| Maximum use reel | Reel 7 |
| Heads | Cross-field head system : erasing, recording / playback Bias head |
| Motor | Hysteresis synchronous 3 speed motor x1 2 x 6 Pole Outer Rotor Motors |
| Semiconductors used | Transistor : 14 IC : 2 |
| Pwer | Can be switched to 6 stages at 100 ~ 240 VAC, 50Hz/60Hz |
| Power consumption | 50 VA ~ 90 VA |
| External dimensions | Width 358x Height 347x Depth 227 mm |
| Weight | 17kg |
| Attachment | Connection code x1 One sensing tape 2 spare fuses |