Dynavector DV 505 tonearm User Manual

Page 8

(December/3/2001)

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 field, and which obstructs conductor in motion. It has almost no damping effect on
motion of non-vibrating tone arm, but is highly effective to vibration of arm, such as arm
resonance.

Inertia controlled dynamic damper
This damper, incorporated into main arm, consists of a pair of spring and mass, each of these
constituents having a carefully selected constant. This spring mass oscillation system oscillates
only horizontally as main arm resonance occurs, and causes resonance peak to dip.
Phase lag in one oscillation system relative to another is effectively applied in this damper,
which functions only in response to arm resonance.

8. Specifications

System

Bi-axls inertia controlled dynamic balance type tone arm

Total length

335mm (including shell)

Effective length

241 mm

Overhang

15mm

Offset angle

21.5 degree

Height

72mm (liftable to max. 94mm )

Height adjustability

37-70mm (at sub arm center)

Optimum cartridge weight

0 - 23grams (or up to 35g including headshell)

Tracklng force adjustability

0 - 3grams by 0.25grams step

Lateral tracking 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