ADJUSTING THE MAGENTA TT10 TURNTABLE
For monophonic records only the adjustment of the
lateral
tracking angle
is of importance. The stylus should ride in the
middle of the groove at the correct down force.
With the introduction of
the stereo record
and its complicated
signal, it became clear that a record can be cut in more than just
one way. The vertical position of the
diamond stylus in the cutter
head
can vary and the result is that the pattern of the groove
changes also. Sometimes the wrong angle is the result of neglect.
Sometimes the cutting under a different angle is done
deliberately. The engineer wants a different result when playing
back the record.
As said, the diamond tip of the cartridge has to be in the same
position as the cutter diamond. Only then will the signal be as
precise as possible.
The importance of this became the more clear when the
elliptical
stylus
was introduced.
C.C. Davis and J.G. Frayne
mentioned this
when describing the
Westrex Stereo Disk System
(Proceedings of
the I.R.E., October 1958). Many articles by renown journalists
soon followed:
John Crabbe
(Hi-Fi News),
F.V. Hunt
(Journal of the
Audio Engineering Society),
C.L. Bastiaans
(Journal of the Audio
Engineering Society),
R.D. Darrell
(High Fidelity Magazine),
E.R.
Madsen
(Audio Magazine). You may come across one or more of
these articles.
The Vertical Tracking Angle was not always standardized. But
since the stereo disc was launched, the angle was defined at 15 º
and was changed in the nineteen seventies to 20 º. That is why
the Ortofon SL-15 became SL-20.
