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1979 Nakamichi 581 Discrete Head Cassette Deck Record Function Does not work
This is an original 1979 Nakamiki 581 Cassette Deck. The physical condition is Excellent to NM. There are no physical flaws of significance and it plays very well. However, the Record function is not working. I do not know if this is an easy fix or complicated. All of the components shift into position when record is pressed, however, the tape does not spin. This component comes from an original owner who kept the deck in a stereo cabinet in his living room for many years. He kept meticulous care of his components. The home was non-smoking and pet-free. If you are reading this, then I do not have to tell you about Nakamichi's cassette decks. If you are looking for a great deck to listen to or repair at a reasonable price that will hold its value and possibly go up, then this is the one!
Below is some info on the deck taken from audiodatabase.com
The cassette deck which adopted the discrete head stream composition which made a sound recording/reproducing head make it independent.
By adoption of a discrete head stream composition, it has 3 head composition including the erasure.
In 581, since line amplifier serves as recording-play combination, an after monitor cannot be performed, but the testing tone of 400Hz/15 kHz can carry out the Direct reading of the regeneration level, recording, and a calibration is easy for it.
The frequency-dispersion type double capstan is adopted.
Although the closed-loop double capstan scheme which holds a tapes by 2 capstans is very advantageous on a modulation noise and a flutter reduction,In 580 serieses, 2 more capstan systems should be differed, the overlap of a flutter peek was avoided, and the modification of a property has been obtained.
The rotation variation of the motor was detected and the high precision rotation has been obtained with the PLL (PLL) scheme which compares and controls the signal and phase of a reference-signal oscillator.
Resin shaping component partses were combined with the chassis which made the entity the big aluminum alloy of the periodic-damping property, the harmful fine oscillation produced from a motor and other body of revolution was absorbed, and the flutter component was decreased.
The coupling capacitor connected to the recording head was deleted from sound-recording amplifier, a hardwired connection and by DC-izing, the circumference of the distorted modification at the time of a sound recording and a low-pass phase was prevented, and the modification of a property is measured.
The double NF circuitry which applies the negative feed back to the capacitor of a sound-recording equalizer and a playback-equalizer circuitry was adopted, distortion generated by a capacitor was pressed down low, and high direct-current stability is taken simultaneously.
By pushing a soft touch button, a verb goes into a logic circuitry and all the operations, such as PLAY, FF, REW, PAUSE, and STOP, operate a mechanism by a control motor. Since the power source is stable unlike the solenoid scheme which consumes a large current momentarily and a tapes can be contacted slowly, a damage is not given to a tapes. Moreover the stable tapes run is obtained and an operation is also very quiet.
| Form | Stereo cassette deck | | Track scheme | 4 track 2ch | | Head stream composition | Combination V-cut head,
Erasure: Double gap ferrite head | | Motor | 38 pulse FG servo motor
2 velocity reversible rotation type DC servo motor | | Tape speed | 4.8cm/second | | Wow and flutter | 0.04%or less Wrms
0.08%or less Wpeak | | Frequency characteristic | 20Hz-20000Hz±3dB | | A comprehensive S/N ratio | 60dB or more (400Hz, 0dB, WTD rms)
66dB or more (400Hz, 3%THD, WTD rms)
(Dolby NR in, 70 microseconds, ZX tapes) | | A comprehensive distortion | 0.8% or less (400Hz, 0dB, ZX tapes)
1.0% or less (400Hz, 0dB, SX, EX IBM PCN II tapes) | | Cancellation ratio | 60dB or more (1kHz, 0dB, ZX tapes) | | Channel separation | 37dB or more (1kHz, 0dB) | | Crosstalk | 60dB or more (1kHz, 0dB) | | Bias frequency | 105kHz | | Input | 50mV, 50kohm | | Output (400Hz, 0dB, output level maxima) | Line: 1V 2.2kohm
Headphone: 45mW, 8ohms | | DC output only for a black-box series | ±10V 125mA maxima | | Power source | 100V 50/60Hz | | Power consumption | A maximum of 27W | | Dimensions | Width 500x height 130x depth of 350mm | | Weight | About 8.3kg | | Remarks | Option: Remote Control unit RM-200 (6,000yen)
Option: RM-580 wireless remote control (28,000yen) |
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