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| AKAI X-150D |
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| 59,500 yen(1967 release) |
The tape deck which adopted the crossing field head.
A crossing field head is the first head for an Akai to succeed in utilization.
Signal current is added to a recording head, bias current is made to be
added to the outside head only for bias, and these heads are in the fixed
space position shifted relatively. Therefore, even if it adds bias, the
signal recorded on a tape does not receive the bad influence of a bias
magnetic field, but is enabling faithful recording.
The hysteresis synchronous 2 speed motor is adopted as a
motor.
Moreover, the amplifier part has adopted the all silicon transistor
solid-state preamplifier.
In consideration of solidity, 2 lever systems
are adopted as the certainty of operation.
The change of a stereo and a
monophonic recording is possible by a truck selector knob.
The
power-supply-voltage selection equipment of a universal system is carried, and
voltage can be freely changed between AC100V - 240V with 50Hz/60Hz two ways.
An automatic shut-off and stop lever, a tape cleaner, each equalizer for
tape speeds, a DIN jack, a stereo headset jack, a triple figure tape counter
with a reset button, and VU meter are carried.
It corresponds also to 38
cm/s by adapter use.
|
| Form |
Tape deck |
| Magnetic tape velocity |
4.75cm/s(1-7/8inch/s)
9.5cm/s(3-3/4inch/s
19cm/s(7-1/2inch/s)
38 cm/s (at the time of 15
inch/s and adapter use) |
| Wow and flutter (at the time of a play)
|
Below 0.15%RMS (19 cm/s)
Below 0.25%RMS (9.5 cm/s)
Below 0.35%RMS (4.75 cm/s) |
| Frequency response |
19 cm/s: 30Hz-23kHz±3dB
9.5 cm/s:
30Hz-18kHz±3dB
4.75 cm/s: 30Hz-9kHz±3dB |
| THD |
2% or less (1kHz, 0VU) |
| Signal to noise ratio |
50dB or more |
| Input level |
Mic (jack): 0.5mV or more
Line (jack):
60mV or more |
| Output voltage |
0VU(1.23V RMS) |
| Recording (play) compensation characteristic
|
NARTB characteristic |
| Recording bias frequency |
60kHz |
| Recording level directions |
VU meter x2 |
| Recording system |
4 truck stereo / monophonic recording, the
Crosfield bias system (patent No. 451906) |
| Fast forward, a rewinding system
|
90 seconds each (a 370m tape, 50Hz)
75
seconds each (a 370m tape, 60Hz) |
| Recording time |
mono: 8 hours (a 370m tape, 4.75 cm/s)
stereo: 4 hours (a 370m tape, 4.75 cm/s) |
| Head |
Recording/playback head: Four trucks A
stereo/monophonic recording (low impedance, 1kHz, 1kohm)
Bias head: Four
trucks Stereo (low impedance, 60kHz, 500ohms)
Erasing head: Four trucks
Stereo (low impedance, 60kHz, 300ohms) |
| Motor |
Hysteresis synchronous 2 speed motor
|
| The semiconductor used |
Transistor: 11 pieces
Diode: Two pieces
Rectifier: Two pieces |
| Power supply voltage |
They are a six-step change, 50Hz/60 Hz
between AC100V - 240V. |
| Power consumption |
55VA |
| Dimensions |
Width 340x height 340x depth of 230mm |
| Weight |
14kg |
| Attachment |
5with pin plug P cord x1
Silicon oil x1
Felt pad x2
Spare fuse x1 |
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