audible science
audible science
COBRA
DESIGN FEATURES
CONT.
THE COUNTERWEIGHT cont.
In addition, to minimize warp wow (pitch
changes as the stylus rides up and down over record
warps), the arm’s vertical pivot should be at the same
height as the record surface.
The Cobra uses a “heart like” shaped counterweight,
optimised for reduction of vibration.
To balance the arm a user uses a series of weights
which are added or subtracted from the underside of the
counterweight to get the cartridge into the correct zone.
An 8 Gram adjustable screw at the rear of the arm allows
for microscopic adjustments in the tracking force once
the cartridge is close to the correct weight range for the
counterweights. The counterweight also allows for some
“skewing” adjustment to forces in the azimuth plane.
THE VERTICAL BEARING MOTION
The Primary Pivot is a Precision Sapphire Vee Jewel with
Hardened Steel matching Central pivot. Used in the finest of
aircraft instruments this pivot technology does not require
heavy mass to be positioned over the pivot thus allowing for
exceptional tracking and response to groove modulation.
PARTS OF
YOUR COBRA
page 12
