Cartridge alignment protractor
An alignment protractor is used to find the
correct distance from stylus tip to tonearm pivot.
When aligning a cartridge for tangency using the
alignment protractor, it is essential to remember
that you are attempting to align the cantilever
(and, hence, the stylus), not the cartridge body.
There is no guarantee that the cantilever is
perfectly aligned within the cartridge body, so
simply aligning the cartridge body will not
necessarily produce the desired result.
Furthermore, many cartridge bodies have nonparallel sides, making tangential alignment of
the cartridge body with the lines of tangency on
the gauge virtually impossible.
An alignment protractor is a plastic template
onto which are printed the null point(s) and lines
of tangency against which the cartridge should
be aligned. The template is placed over the
turntable's spindle (made possible via a spindlesized hole drilled in the template) and placed
against the platter.
Cartridge must be adjusted until the cantilever is
parallel to the set of parallel lines. And this
should be achieved for both the indicated points.
When the cartridge's longitudinal axis is parallel
with the horisontal lines, tracking error will be at
a minimum.
Ortofon A/S | Stavangervej 9 | DK-4900 | Nakskov | Denmark | Tel. +45 54 91 19 15 | Fax +45 54 91 19 11 | www.ortofon.com
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