Dynavector DV-505 Manuals

Dynavector DV-505 Tone arm Instruction Manual INDEX Dynavector DV-505 tone arm has an entirely new concept in tone arm design. The DV-505 is a high performance tone arm with various new functions that make the cartridge in use work the best way it can. The DV-505 user is requested to please read through this brochure to enjoy its niceties fully. 1. Foreword 2. Parts illustration 3. Pre use check points 4. Application(1) 5. Application(2) 6. Arm resonance 7. Two dampers 8. Specifications discontinued 1. Foreword As is commonly known, a pickup cartridge generates electricity by cantilever motion relative to motion of cartridge proper. While cantilever stylus precisely traces signals recorded in groove of disk, cartridge proper receives those signals faithfully provided that it is held motionless (free of vibration). Hence, the great role of a tone arm. How should cartridge be held motionless without adverse effects on signal trackability? The DV-505 has solved this problem by adopting the unique (vertical/horizontal) Bi-axis system. The horizontally movable main arm is of sufficient weight for vibration-free operation, and the adverse effect of weight on signal trackability is nullified by use of an angular-radial compound bearing design. Conversely, the vertically movable sub-arm is made so light that it never lets the stylus jump the groove of even a disk with warp(s) previously unnegotiable. Also, the DV-505 employs a double damper method -- inertia controlled dynamic damping type plus electro- magnetic damping type -- to introduce an ideal solution to the problem of tone arm resonance in low frequency range. This has generally been neglected about audio equipment that absolutely requires a flat frequency characteristic. 2. Parts illustration 3. Pre use check points The DV-505 leaves factory only after fine adjustment and meticulous check. But unexpectable incidents in transit can possibly change its condition. To use the DV-505 in its best condition, the user is requested to check the following points prior to application: G Isn't damper plate in contact with magnet? Pick up main arm and gently reciprocate it sideways. If damper plate is free from bent (or distortion) and clear of magnet, main arm can be thus moved smoothly. Otherwise, metallic frictional sound occurs and, as this motion is forced, it encounters growing resistance. In such a case, confirm direction in which damper plate is bent and apply finger pressure to put it into right and straight shape. (This copper plate can be deformed with ease. After its adjustment, it must not be touched by hand or hit by foreign object.) G Is inertia controlled dynamic damper functioning? Pick up main arm gently and look in from below. Normally, damper weight is seen vibrating finely. If it is in contact with arm's inner surface and is not so vibrating, Loosen stopper and, with light downward pull, refasten it, and/or straighten springboard. 4. Application (1) Output cord fixing As illustrated connect output cord connector (accessory attachment) securely to output terminal plug below arm. Even when this is complete, connector leaves plug stem uncovered for 5mm, which is so designed to be compatible also with other output cords sold generally on the market. Headshell/cartridge fixing Fix cartridge to shell (for temporary purpose), insert template between arm and shell, and lock shell. Then where stylus points exactly at special mark on template, fix cartridge securely to shell. Do not remove template yet because it will also be used, the way it is, for positioning arm. (Stylus position so determined allows for template thickness. When template is removed and shell finally locked completely, stylus finds itself in right position.)