SONY TC-K222ESA
¥ 60,000 (released in 1991)
Commentary
This is a cassette deck of the ESA series which was developed by inheriting the design of the high-grade aircraft.
In order to further improve the accuracy of the silent and quick action mechanism deck, it is equipped with a mechanism deck that adopts Lapis (sapphire capstan base system). By using sapphire with high hardness and low friction coefficient for the bearing, rigidity and durability are improved.
Combined with the adoption of a 3-phase linear torque BSL motor with less rotational unevenness, this product ensures stable tape running performance.
High-rigidity zinc die-cast (Bellick) is used for the head base material, which is the base of the head. By eliminating unnecessary vibration and maintaining accurate azimuth accuracy, good phase characteristics between channels are achieved.
A monocoque zinc die-cast (Bellick) base is used for the base of the motor to reduce modulation noise generated by external vibration such as sound pressure. The motor and base are integrated to provide highly accurate and stable rotational performance.
A closed-loop dual capstan system has been adopted in which capstan and pinch stan and pinch rollers on both the take-up side and the supply side centering on the tape head. This improves wow and flutter characteristics and reduces modulation noise caused by tape vibration.
In addition, the capstan drive adopts a direct drive system equipped with a 3-phase linear torque BSL motor with extremely low rotational unevenness, thus achieving excellent performance.
To ensure sound purity, the layout of the audio circuit follows the signal flow as closely as possible.
Single-crystalline ESC-OCC wire rod with a purity of 99.997% or more and with almost no grain boundaries is used in important parts of the oxygen-free copper.
The playback equalizer amplifier section has a two stage configuration consisting of a discrete FET and an OP amplifier for signal amplification. The first stage FET suppresses noise and the second stage OP amplifier amplifies the signal, thus achieving both high sound quality and low noise.
It is equipped with an input terminal for CD recording that enables recording through a simple signal path.
It uses a specially designed rigid beam chassis, which is joined by three beams at the front and rear of the front and rear, greatly improving rigidity and reducing chassis torsion caused by vibration.
In addition, the strength of the cabinet is increased by fixing the top plate with 6-point screws and using a metal material with sufficient thickness for the chassis material.
High rigidity and high specific gravity fine ceramic composite material is adopted for the cassette holder, and vibration is suppressed by high rigidity.
Aluminum extruding material is used for the cassette lid to improve accuracy.
It is equipped with a cassette stabilizer. As soon as the tape is loaded into the mechanical deck, the stabilizer inside the cassette door firmly secures the cassette half and reduces vibration of the tape.
In particular, the ES Series uses a new material, sorbacein, for the free-action holding arm and stabilizer to absorb harmful vibrations and prevent modulation noise.
Based on a laser amorphous head that takes advantage of the characteristics of amorphous magnetic alloys, we have adopted a PC-OCC wound laser amorphous head that uses high-purity oxygen-free copper PC-OCC for the head winding.
A pad pressure reduction system is adopted, and a convex protruding part is provided on the surface of the head so that it touches both ends of the pad on the left and right side in the tape running direction, so that excess pressure of the pad is not applied.
This method works effectively especially in the closed loop dual capstan mechanical deck, and realizes an ideal tape contact mainly for tension control in the loop.
Equipped with Dolby HX Pro, the effective bias amount is controlled to the optimum value in 1/1000 second unit to prevent over-bias and increase linearity in the high frequency range.
It employs a super-bias, and by greatly shifting up the frequency of the bias signal, the frequency difference with the audio signal is expanded, and generation of beat noise and intermodulation distortion due to mutual interference is suppressed.
It is equipped with a bias calibration function that can adjust the bias value within ± 20% according to the tape to be used by the built-in oscillator (oscillator), and with a recording level calibration function that eliminates the level difference between recording and playback due to tape sensitivity.
The power cable is a highly durable cabtire cable with a polarity indicator that allows the polarity of each component to be adjusted.
Equipped with a CD sync recording function, it can be easily recorded from a CD to a deck by combining it with Sony's remote-controlled CD player.
It adopts FL linear electronic counter of minute and second display linked with time.
Equipped with a subtraction function that makes it easy to understand the remaining time.
It is equipped with an auto-monitor function that simplifies the operation during playback. When you press the play button, it automatically switches from the SOURCE position to the TAPE position.
It is equipped with a peak level meter that displays the peak value of the music signal in real time and also has a peak hold function.
Equipped with a display mode switch, it can be switched to 3 modes such as full lighting, partial lighting of the counter only, or off.
Equipped with AMS (Automatic Music Sensor), you can quickly find the beginning of the previous or next song.
The ES Series is easy to use with one touch operation.
It is equipped with the Auto Space REC MUTE function. When you press the REC MUTE button during recording or recording pause, it automatically records silence for approximately four seconds, then sends the tape for that amount and stops temporarily.
Power loading is adopted, and the cassette is automatically loaded into the mechanical deck just by pressing the operation button such as play or fast forward / rewind without closing the cassette door, and it quickly shifts to each operation mode.
This series of operations is also performed when the remote control is operated.
Wireless remote control is included.
.JPG)
Model Rating
| Type | Cassette deck |
| Capstan bearing | Sapphire bearing : 1 |
| Heads | Erase : 1 Recording : 1 Play : 1 |
| Motor | Linear Torque BSL D. D. Motor : 1 DC Motor : 2 |
| Signal-to-noise ratio | 57 dB (EIAJ, Dolby off, standard recording level, ES and IV cassette) 76 dB (Dolby NRC, maximum recording level, ES ・ IV cassette) |
| Frequency characteristic | 15 Hz ~ 22 kHz ± 3 dB (EIAJ, ES / IV Cassette) |
| Frequency range | 10 Hz ~ 23 kHz (EIAJ, ES, IV Cassette) |
| Wow and flutter (EIAJ) |
± 0.04% Wpeak 0.022%WRMS |
| Distortion factor | 1.3% (Third Harmonic Distortion Factor, 250nWb/m, 315 Hz, ES ・ IV Cassette) |
| Power consumption | 19W |
| External dimensions | Width 430x Height 135x Depth 360 mm |
| Weight | 7.1kg |
| Attachment | Wireless Remote Control RM-J701 |