background image

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

Содержание DV-505

Страница 1: ... 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 i...

Страница 2: ... 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 Th...

Страница 3: ...w 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 r...

Страница 4: ...position so determined drill convenient screw holes in player board and fix base plate onto it with wood screws supplied In case that player board has not insulator or if the user wants to set the DV 505 without fixing to player board Put the rubber sheet supplied under the base plate At usual conditions of use this is not necessary Arm height adjusting With slide stopper relaxed height of arm can...

Страница 5: ...ows laterally to either side while inside force canceller weight is suspended from zero point or is removed from cartridge slide lateral balancer to either side to prevent arm from flowing so Make sure beforehand that arm base is set level Tracking force adjusting First set tracking force adjuster to zero point and balance sub arm precisely level by sliding sub weight to right position Sub arm so ...

Страница 6: ... arm as a whole is designed to be elevated But user is requested not to lift it excessively or with abrupt force 5 Application 2 Player equipped with cover Player may have its cover Because the DV 505 output service cord is not led out through player board cover won t close neatly In such a case make a hole 21mm 25mm in diameter at a convenient place in player board fit accessory bushing to hole s...

Страница 7: ...eplace output terminal Cord connector can be removed in the following manner either for replacement with another kind of connector or for complete removal to eliminate needless contact resistance 1 Link connector of accessory output service cord to output plug 2 Remove fastener screw with screwdriver 3 Pull cord gently and output terminal is removed from cord 4 Wiring colors mean red Right channel...

Страница 8: ...ance in low frequency area and there are as many resonance sources as there are pivoting gadgets in tone arm At such a frequency of resonance arm becomes very sensitive to vibration and even when frequencies of flat characteristics are reproduced from record arm resonance causes larger output than true to record or peak phases See diagram 3 At frequencies higher than arm resonance arm does not so ...

Страница 9: ...s surfaces so warped that no other tone arms could negotiate well and thereby limits effect of such warped disks on sound reproduction The DV 505 an out performer 7 Two dampers As explained in part 7 DV 505 employs two kinds of damper electro magnetic and inertia controlled type electro magnetic damper This damper applies effect of eddy current which is generated when conductor moves in magnetic f...

Страница 10: ...ing angle error 1 1 degree to 2 2 degree 0 degree at inner band of record disk 2 2 degree at outside Motion sensitivity Lateral less than 50mgrams Vertical less than 50mgrams Net weight 1 250 grams Output connector 5P connector with low resistance cord 0 025ohms m 37pF m Head connector EIA standards Head shell Aluminum headshell December 3 2001 Return to Top Home Products Distributors Download Lin...

Отзывы: