AKAI GXC-760D Stereo cassette deck Newly developed REC/PB combination GX head

Description

Product description Stereo cassette deck with 3 heads and 3 motors. The head part has a 3-head configuration. With the three-head system, which allows the recording head and playback head to be dedicated, each head can be designed to fully demonstrate the required characteristics, making it possible to record and playback that take advantage of the tape's performance. The newly developed REC/PB combination GX head is used as the head. This head uses an ultra-narrow gap of 4μ for the recording head gap and 1μ for the playback head, improving high-frequency linearity, which is a weak point of cassettes, and providing a frequency response that extends flat from low to high frequencies. It is being In addition, the wear resistance that is a feature of the GX head allows it to maintain its excellent initial characteristics. The REC/PB combination GX head has two gaps in place of the one-gap cassette half pad, and the surface shape has been devised to ensure sufficient tape contact. The parallelism between the recording gap and the playback gap and the directional shift between channels are also suppressed to a degree that has almost no effect by making full use of ultra-precision processing technology, suppressing azimuth loss and phase shift. Moreover, although the recording/reproducing head is adjacent to 4.5 mm, a special shielding method is adopted in order to reduce the influence of leakage magnetic flux (field through) during simultaneous recording and tape monitoring. Furthermore, countermeasures have been taken by processing the shape of the tip of the head to prevent the contour effect that causes low frequencies to growl during playback. The time difference during recording and simultaneous tape monitoring is suppressed to 0.1 seconds. The mechanism uses a 3-motor system for the first time in a front-operated cassette deck. Conventional one-motor cassette decks use many rotating parts such as belts, idlers, and pulleys in the rotating mechanism because the tape is driven, fed, and taken up by a single motor. This resulted in accuracy errors in component parts, looseness, and uneven rotation due to changes over time. In the 3-motor system, the capstan motor only rotates the flywheel, and dedicated reel motors are used for tape supply and winding, respectively, to stabilize tape running. The mechanism uses a closed loop double capstan system. In this method, two pairs of pinch rollers and a capstan shaft cut off the tape supply and take-up sides, keeping the tension in the loop constant at all times, preventing changes in tension due to the tape winding diameter, and preventing the tape from touching the head. can be kept stable. Parts that make up the running diameter such as capstan shafts, belts, flywheels, and pinch rollers have a 3mmφ capstan shaft with a roundness error of 0.1μ and a mirror-polished finish to improve dimensional accuracy and eliminate machining errors. attention is being paid. The capstan motor uses an AC servo motor with a built-in CPG, which has a proven track record in AKAI's open reel decks, and has been miniaturized for cassette use. The AC motor with a built-in CPG, which has a large rotational torque and accurately controls rotation by the action of a servo amplifier, detects a large AC voltage through 40 gears carved into the fixed part and the rotating part, and has a frequency generator built into the motor. As a result, the center runout of the detection unit can be minimized and smooth rotation is achieved. The reel motor uses a slotless DC motor. This motor has excellent durability with little cocking, especially at low speeds. In addition, the reel motor is directly connected to the reel shaft without using a belt or pulley, so there is no change in characteristics due to belt wear or deterioration. A double independent drive system is adopted in which the capstan and reel stand are driven separately by dedicated rubber belts, which eliminates unnecessary strain on the rotation of the capstan and achieves stable tape running. The system control section uses a logic circuit, and each mode can be switched by simply pressing lightly. The buttons are self-illuminated and illuminate from inside, making it easy to identify the mode. It is also possible to connect the separately sold remote control unit RC-17 and timer control adapter TA-270, and by combining it with the separately sold timer, you can record when you are away and play alarm clocks. When the machine is at rest, the full-release auto-stop mechanism automatically moves the pinch roller away from the capstan, so there is no unnecessary strain on the mechanism. Adopts a full direct function change mechanism, so it can be operated directly by system control without having to press Stop once during FF/RWD etc. from Play. Equipped with a peak/VU switching type meter. The response time of the meter pointer between -20VU and 0VU during peak check is 10 milliseconds, and the return time is 1.5 seconds. By quickly responding to large input signals that are input momentarily, you can record with a wide dynamic range and a good S/N ratio. 0VU on the meter is set to +8dB during peak check, making it easy to intuitively grasp the maximum recording level by the swing of the meter pointer. Equipped with an automatic tape slack removal mechanism. If you operate the machine with slack in the cassette tape, it may become tangled and cause damage to the tape. When the tape is set in the machine, the reel motor automatically removes slack from the tape and prepares for safe tape running. A built-in oscillator provides a 400Hz test tone and a monitor switch allows you to accurately set the tape's standard recording level. Equipped with Dolby B NR as a noise reduction system. Equipped with ADR system. This method automatically varies the equalizer characteristics according to the sound volume and frequency band under recording conditions that match the actual usage conditions so that high-frequency signals do not exceed the tape's saturation level and become over-recorded. The method is to do so. This expands the high frequency recording limit and enables recording that takes advantage of the tape's dynamic range. Tapes recorded with the ADR system can be played on any cassette deck. Line and microphone mixing is possible. Equipped with a 3-position tape selector that also supports ferrichrome tape. Equipped with an MPX filter switch that improves high-frequency characteristics in normal recording. Equipped with a rec calibration volume that allows level adjustment for each tape. A housing lamp is mounted on the top of the cassette holder, and a reflector is used to brightly illuminate the tape monitoring window of the cassette half from the back. This allows you to check the tape status. Equipped with a linear motion mechanism, the head, which frequently moves up and down, is moved linearly by the linear axis and bearings in each block, eliminating back and forth and left and right wobbling. This increases the reliability of the mechanism and enables more faithful recording and playback. It uses a double-action cassette holder, and when you press the Eject button, the cassette holder slides forward 12mm and then tilts forward 20 degrees. This provides enough space in the opening for easy insertion and removal of cassette tapes. ●Main specifications Model stereo cassette deck Track system 4-track 2-channel stereo system Tape speed 4.75cm/s Wow/Flutter 0.06%WRMS Frequency characteristics 30Hz to 19kHz ±3dB (when using ferrichrome tape) 30Hz to 16kHz ±3dB (when using chrome tape) 30Hz to 15kHz ±3dB (when using low noise tape) Distortion rate 1.0% (1kHz, 0VU) S/N ratio 55dB When using Dolby NR: 6dB improvement (1kHz), 10dB improvement (5kHz or more) Bias frequency 100kHz Head recording/playback: GX combination head x1 Erase head x1 Motor: AC servo outer rotor motor x1 with built-in CPG DC motor x2 Fast forward/rewind time: within 70 seconds (C-60 tape) Input level Mic:0.3mV/-69dB/600Ω~10kΩ Line:70mV/-21dB/100kΩ Output level Line: 0.775V (at 0VU)/20kΩ or more Headphone:50mV/8Ω Power supply AC100V, 50Hz/60Hz Power consumption 50W External dimensions Width 440x Height 142x Depth 306mm Weight 11.1kg ★As the item is an old item, there are some signs of use due to age and some scratches on the outer wood case. I have confirmed that the power is on. Since I don't have the equipment to confirm and am an amateur, other details have not been checked. Since there is no warranty, we will sell it as is. Please consider this only if you understand. For "remote delivery areas", additional fees will be charged. Import duties,taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. These charges are normally collected by the delivering freight(shipping) company or when you pick the item up. -do not confuse them for additional shipping charges. We do not mark merchandise values below value or mark items as "gifts". -US and International government regulations prohibit such behavior.