Description
DescriptionA reference model cassette deck that pursues the ultimate in analog decks and aims for master numbers. In order to reduce vibration of cassette half, A, M, T, and S (Anti Modulation Tape Stabilizer) are carried.In the A/M/T/S, the cassette box has a two-layer structure consisting of a non-magnetic aluminum plate and a non-repulsive special rubber carefully selected for sound quality. doing. This has reduced modulation noise and tape run noise sharply. The mechanism part is equipped with a super stabilized tension dual capstan mechanism.In this mechanism, a constant tape tension is always maintained from the beginning of winding to the end of winding by two capstans. In addition, Aiwas original micro grain processing is applied to the capstan on the take-up side, and by performing fine granular processing on the capstan surface, tape slip is prevented and deterioration of the tape and capstan itself is prevented. are reduced.Moreover, by adopting the frequency separation type dual capstan which changes the shaft diameter of two capstans, the overlap of the frequency is eliminated and the resonance is prevented. A three-motor configuration is adopted, and one dedicated motor is mounted for FF/REW, one for capstan, and one for winding during recording/playback. Furthermore, the winding-only motor adopts a belt-drive drive to improve the sound quality, and is freed from the cogging that occurs in the method of training FF/REW.In addition, by performing high-precision processing on the zinc die-cast heavyweight flywheel and mounting each one after achieving dynamic balance, excellent characteristics are achieved. A 30g heavyweight zinc die-cast head block is used for the head block. Reduction of modulation noise is aimed at by suppressing fine head oscillation by this. Furthermore, a bias shield is set in the head block to suppress bias leakage and signal leakage from the recording head wire to the playback head wire. Amorphous heads with excellent saturation magnetic flux density, magnetic permeability, wear resistance, etc. are used for the recording and playback heads. Furthermore, PC-OCC with a purity of 99.997% and an oxygen content of 5ppm or less is adopted for the winding of the head.In addition, Aiwas original design is adopted for the head shape with sufficient consideration given to the contour effect, which suppresses the low frequency range. The dual capstan mechanism provides a constant higher tape tension than a single capstan, resulting in better tape-to-head adhesion. For this reason, if a normal ferrite material is used for the erase head, the spontaneous magnetization associated with the ferrite materials coercive force = Hc (0.1 to 0.15) will cause deterioration in the high frequency range of the tape signal. For this reason, a sendust head with a low Hc of 0.007 to 0.02 is used as the erasing head. As a noise reduction system, the Dolby B/C type is dually installed, and dbx is also installed. The Dolby HX pro which improves a dynamic range and a frequency characteristic of a high region is carried.With Dolby HX Pro, the characteristics are improved by recording while adjusting the bias amount in 1/1000 second units to match the high frequency signal.In addition, by configuring the Dolby HX Pro circuit in a discrete configuration, the optimum circuit constants are selected one by one according to the head used, further improving sound quality. The PC-OCC wound playback head and playback amplifier are directly connected by PC-OCC wires, and the connectors and coupling capacitors that cause sound quality deterioration, as well as the peaking capacitors that cause phase shifts in the high range, are removed. completely excluded.Furthermore, the low-noise, low-distortion, high withstand voltage, and high slew-rate DC configuration amplifier developed exclusively for the amplification element are adopted. Combined with a high-precision equalizer element, etc., expansion of the dynamic range and high-quality sound are realized. The large-capacity power transformer which became independent, respectively is adopted as a power-source part for a logic system and a signal system. The digital signal of the logic system and the analog signal of the signal system are completely separated, and signal leakage and adverse effects from the digital system to the analog system are suppressed.In addition, the transformer itself has a vibration-proof design that is hardened with an epoxy-based filler, and by setting the transformer outside the main unit, it eliminates the adverse effects of the flux and microvibrations generated by the power transformer on the tape head and signal system. increase. The printed circuit boards of the mechanical logic system, the display system, and the signal system are made independent, respectively, and an independent separation structure is adopted in which they are installed at sufficient intervals.The mechanical logic system and the display system are each isolated by an internal chassis to eliminate interference with the signal system. Furthermore, the recording system and the playback system are also completely separated to prevent the influence of the recording system signal, the high frequency bias at the time of recording, etc. on the playback system. Simple and straight signal transmission is achieved by eliminating as much as possible electronic switches, switching circuits, connectors, and printed patterns that cause deterioration in sound quality.In addition, transmission mechanisms such as an MPX circuit with a through position and an open-type muting circuit during performance that do not cause sound quality deterioration when turned off are installed. The bottom of the main body is equipped with an insulator with a unique structure, and the sides are equipped with side woods to prevent resonance.In addition, anti-vibration material is used for the top and bottom plates, and the recycled board is firmly fixed with two special holders and six special screws with flanges. It has manual calibration. Furthermore, since the built-in oscillator is set to 400Hz and 10kHz, it is possible to adjust a wider frequency response.Furthermore, since the level meter is expanded to 0.5dB steps during calibration, highly accurate calibration can be performed. A three-stage recording equalizer can be set according to the type of recording source and the tape.High emphasizes the low MOL (Maximum Output Level), Norm is the standard setting, and Low emphasizes the high MOL. The linear counter is carried, the pulse from a reel stand on either side can be calculated at high speed, and tape run both can be digitally displayed on a minute-second basis. It can be displayed in all driving modes.At the time of recording, the pre-end blinker which flashes and notifies from 3 minutes before a tape end (when using C-60) is carried. The MPX filter and bias trap filter which use a PC-OCC winding and a low-distortion core are adopted. The peak meter with the peak hold of 24 segments x2ch is carried.This meter is capable of Auto/Manual Reset. A detent-type recording volume with excellent separation and crosstalk characteristics and little left-right interlocking error and sound quality deterioration is employed. A 70 micron copper foil printed circuit board is used. The AC code with a polar display using OFC material is adopted. Gold-plated terminals are used for input/output terminals and headphone terminals. The special three-layer structure has adopted the metallized polyester film capacitor which reduced auditory distortion. An OFC heat sink is used. Shipping All shipments have tracking.I will carefully deliver using the packing material.I ship by FedEx or DHL or JapanPost. International Buyers - Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost.These charges are the buyers responsibility.Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying.?Thank you for your understanding.
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