In 2005, Oyaide made a cable using pure silver, which has the highest electrical conductivity of all metals. The FTVS-408, a coaxial cable, was designed to be mainly used for digital signal transmission. Subsequently, Oyaide were able to produce FTVS-510 by changing the conductor from 4N silver to 5N silver. Oyaide devoted much energy to providing the finest 5N silver and to researching the perfect insulator and shield for the silver conductor. Cable manufacturing technology has made great progress in three years. Oyaide is finally able to introduce FTVS-910 which has pure silver twin-axis conductors. Its unlimited transparency is represented by its beautiful exterior coated by brilliant silver. The 0.2mm 5N pure silver wires are made by advanced manufacturing processes including the continuous casting process that takes place in a high-frequency electric furnace, 19 stages of cold rolling, a drawing process and a final annealing operation.		Japan Made. Highest manufacturing standard Contents .. Unterminated Oyaide FTVS-910 Cable Cut by the meter from a reel. Quantity of 1 means 1 m, 2 means 2m, etc .. No retail packaging. Supplied by Authorized Resellers in Japan. Beware of Fakes on eBay and several other shops.
For the insulation material, Oyaide used a combination of FEP(Teflon) which has the lowest level of electric permittivity and PE(Polyethylene). These help to enhance the transmitting performance of the FTVS-910. Double-layered shielding whose performance has been proven in our FTVS-510 is also used in the FTVS-910. It protects against broad band noise and noise from micro-arcing. The impedance is set to 110Ω. This means FTVS-910 can be applied for digital interconnection (AES/EBU) as well as for analog. Pure Silver Conductor Pure silver is the best material for high-speed transmission due to its excellent electrical conductivity which is far superior to high-purity copper. However, the price of silver continues to rise ever higher making it one of the rare metals. For the core of FTVS-910, 5N jewelry grade pure silver, which is far better than industrial grade, is used. After being melted in a ceramic crucible, it is molded into 15mm diameter round bars. It is further reduced in diameter by means of 19 repetitions of the cold rolling process. Afterwards, the silver wire is further reduced to 1.05mm by a low-speed drawing process. After the final rolling operation and mirror surface finishing, stress and strain that is generated by the drawing process is slowly removed by a lengthy annealing operation in a high-frequency electric furnace filled with inactive gas to prevent the silver from combining with oxygen. The completed ultra-pure silver wires are immediately packaged in nitrogen gas and are safely stored until the next process. Insulator Although the conductor is the most important factor in signal transmission, the insulator is also significant in enhancing the transmitting capabilities of the cable. For the purpose of lessening signal loss, Oyaide employed Teflon which provides excellent electrical isolation and low electric permittivity. For the first insulation layer, Oyaide selected PE (Polyethylene) which keeps permittivity to a minimum and enhances the flexibility of the cable. This layering of these different materials not only enhances the conductor's electric capabilities but also attenuates internal vibration by altering the resonance point. Triple-layered shielding structure When Oyaide conceived of the FTVS-910 our goal was unlimited transparency. The ultra silent background of the FTVS-910 is provided by a triple-layered shielding structure. The first semiconductor layer attenuates static noise and electric micro waves. The second copper foil shielding protects against high-frequency noise. The third, silver plated mesh shielding, protects against low-frequency noise. It also protects against high-frequency noise by means of the skin effect on the silver plating. Semiconductor layer Although Teflon has a great electric characteristic, Oyaide needed to adopt a method for static electricity removal due to the fact that teflon charges easily. When signal flows in a cable, it generates ultra weak vibrations which cause the discharge of an electric corona. In order to solve this problem, Oyaide installed Carbon PE as a semiconductor layer. By surrounding just the outside of the first insulation layer, this semiconductor layer helps to discharge static buildup from the Teflon layer in an orderly fashion. The exterior The beautiful and clear urethane sheathing has excellent mechanical strength and always maintains a stable level of hardness without being affected by temperature change. Moreover, due to its high shock absorption and degree of elasticity, polyurethane provides powerful isolation from vibrations. Conductor 1mm 5N 99.9995% pure silver Insulation Teflon skin layer + foaming polyethylene Shield Conductive Carbon PE / Copper foil + silver plating copper (more than assortment rate 90%) Resistance 25 Ω/km Capacitance 72 pF/m Attenuation 74.5 dB/km Impedance 110 Ω Length 1~50m, unterminated Weight 200g every 1m