Beschreibung
Audiocraft AC-300 one pivot, oil damping tonearm * perfect working condition. Cable is included as a part of auction. Specification: An improved tonearm based on the AC-300/AC-400. AC-300C is 35cm type, AC-400C is 40cm type. The one-point support system by the jewel which has a spring suspension is adopted as a rotation bearing part. Furthermore, the oil dump method which applies moderate oil control with an orthodox hemispherical damping material is adopted. As a result, harmful resonance is suppressed and the resonance of the tonearm is low, realizing excellent performance in reproducibility of the low range. Because the one-point support oil dump type tonearm has low mechanical sensitivity, it is considered unsuitable for cartridges designed for high compliance and low stylus pressure. In the AC-300C/AC-400C, this problem is dealt with by installing an oil damping amount adjustment mechanism, and it is possible to switch to the best damping position by adapting to the characteristics of the cartridge to be used and the stylus pressure. This mechanism is a method that allows the gap between the braking ball and the oil cup to be adjusted accurately by refinement of the rotary bearing to vary the damping amount of the oil. For this reason, we have eliminated the drawbacks of conventional oil-dump tonearms, such as adjustment by eye and manual adjustment. The adjustment knob can be continuously changed to 3 positions of Light-Normal-Heavy for each rotation, and the performance of the cartridge to be used can be demonstrated. Also, the damping oil is designed to be easily replaced by removing 3 screws. In addition, the standard specification damping oil has a viscosity unit of 200,000 cs, but as an option, low viscosity (100,000 cs) and high viscosity (300,000 cs) were also available. . The inside force canceller is carried. With the one-point support method, it was said that adding an inside force canceller to maintain lateral balance was difficult, but with the AC-300C/AC-400C, the cancel point is located near the suspension axis and maintains lateral balance over the entire surface of the record. By taking , stable operation is ensured and tracing ability is improved. The lateral balancer adopts the NLB (Neutral Lateral Balance) method incorporated in the rear of the center block. With this method, the built-in weight slides by rotating the left and right small knobs, enabling accurate lateral balance on the arm axis. The amount of slide is lock-to-lock with about 9 turns of the knob, and quick adjustment is possible. In addition, the included sublateral weight allows for a sufficiently wide balance range. In addition, a lateral balance gauge is included, allowing you to monitor the lateral balance more reliably. The head shell is equipped with AS-2Plus of 2 lock pin system as standard equipment. Locking to the tonearm is more secure than the conventional one-pin method, and there is no mounting backlash. In addition, it has a robust structure using a light alloy material with a plate thickness of 2.8 mm, and has high rigidity and sufficiently suppresses resonance. Harmful resonance is removed by integrally molding the finger part. Gold plating is applied to the contacts and lead pins. The double weight mechanism is adopted as the weight assembly. The stylus pressure is precisely adjusted by the linear slide of the main weight and the rotation of the counter ring. The indicated value is a direct reading type with 0 to 3g in 0.25g steps. By adopting this double weight mechanism, the overall length of the weight assembly can be varied from 28 to 34 mm for the AC-300C and from 28 to 39 mm for the AC-400C. Improved operational stability. The arm lifter uses a highly reliable one with a unique structure. The oil dump cylinder has a structure that does not leak oil even after many years of use. In addition, the height of the lifter can be adjusted by rotating the ring on the cylinder head in correspondence with the damping amount adjustment mechanism. All contact points, from the lead pin of the head shell to the pin plug of the output cord, are plated with gold to prevent poor contact due to corrosion or the like. In addition, a low dose type (33pF/m) is used for the output cord, and the plug socket connected to the tonearm is also a new type that guarantees a more reliable contact. A large lock nut with a length of 25 mm is used to attach the tone arm to the monitor board, which is an element that suppresses resonance. There were plenty of option parts. ?? AC-300C AC-400C ?? ????????????????? ?? 333mm 379mm ??? 237mm 283mm ??????? 15mm 13mm ????????????????? 222mm 270mm ????????? 0.21?/cm?? 0.13?/cm?? ????? 85mm 90mm ?????? 0?3g(0.25g????)???? ?????????? 3.5?15g ???????? NLB?? ??????? ????????(????????) ??????????????? ???? Please check business term before bidding on my item /////////////////////////////// NOTE: 1. If you want to buy item, press buy it now or make offer button if you want to offer your best price. 2. I only ship item via EMS or Fedex, I dont accept ship item via sea way. 3. Please make your payment within 3 days. 4. If you have any question about item, feel free to ask me before bidding. Generally, I dont response to question ask about what is your best price, you can press best offer button and input your best price. If there is no best offer button then item is fixed price. 5. If you want to find any item related to audio turntable, audio vintage or amplifier, and you can not see in my listing, please ask me via message, I can help you find it. 6. If you want to know about me, you can search on google with key word Otomon Laboratory //////////////////////////////
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