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How to aveid howling
Your
turntable
should
be placed
at a place as fae ain your sHekbar
systems
as
possible,
so
that
sound
vibration
does
not
effect
stylus
movement.
Acoustic
feedback
or
''howling,''
caused
when
the sound
emanating
from
the
speaker
systems
vibrates
the
floor
and
air, will indirectly
vibrate the stylus tip. Such vibration
is amplified
by the amplifier and
reproduced
through the speakers infinitely. The result is an oscillating
boom audible when a record its played.
Should
you
experience
howling, place the turntable still further away
from
the
speakers,
use
separate
bases
for
the
turntable
and
the
speakers,
erect
an
acoustic
shield
between
speakers
and
the turntable,
and/or reduce the volume level.
Dust and dirt are the major obstacles to noise-free record reproduction:
When
grime is allowed
to collect in the record groove it will stick to
the stylus tip, thus
accelerating
record
and stylus wear and moreover
deteriorating
the quality
of the
reproduced
sound.
CD-4
records
in
particular require extra care.
Every
time you
play a record, first carefully remove all dirt and dust
with
a record
cleaner;
use
the
stylus
brush
to
remove
dirt
from the stylus tip.
In cleaning
the tip, avoid
touching
it with
your
finger or subjecting
it to shock;
such
mistreatment
may
not only shorten
its life but may
even dislodge the jeweled tip itself.
'Induced hum
Any
nearby
motor-equipped
apparatus
such
as
an
electric
sewing
machine
or
fan,
or a large
power
transformer
may
influence
your
turntable
and
cause
booming
hum.
If you
experience
this, move
the
apparatus
in
question
as
far
as
possible
from
the
turntable.
When
placing the turntable
next
to your
amplifier,
hum
will
be reduced
if
you place it on the side af the amplifier opposite to the side where its
transformer is located.
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