LENCO L78 - Assembling the Cartridge into the Plug-in Head; Setting of Stylus Pressure; Arm Lifting Device Adjustment; Electrical Connection

selected
(e.g.
to
play
older
78
rpm
shellac
records),
we
suggest
that
a
separate
plug-in
head
is
pur-
chased
for
each
one
to
facilitate
the
change
from
one
cartridge
to
another.
Assembling
of
the
Cartridge
into
the
Plug-in
Head
The
cartridge
should
be
mounted
onto
the
mounting
plate
with
the
assembly
material
provided.
The
plug-in
head
should
then
be
put
onto
the
tone-
arm
and
secured
by
knurled
ring
(10).
Place
the
semi-circular
cut
out
in
the
template
round
the
pedestal
of
the
pick-up
arm
and
the
hole
,A'
over
the
centre
spindle
of
the
turntable.
Withdraw
the
tonearm
from
the
securing
clip
(9)
push
it
towards
the
centre
of
the
turntable
and
lay
it gently
on
the
cardboard.
Loosen
screw
(14)
on
pick-up
the
head
(11).
Slide
the
small
mounting
plate
with
the
cartridge
in
the
plug-in
head,
until
the
point
of
the
needle
is
di-
rectly
on
the
black
line
of
the
setting
gauge,
tighten
the
screw
(14).
Remove
plug-in
head
from
tonearm
and
connect
pick-up
leads
to
cartridge.
Right channel: R= red
Right earth channel: GR = green
Left channel: L white
Left earth channel: GL = blue
Put the plug-in head onto the tonearm again and
secure with ring (10).
Mounting Material
2 screws 0.118 inches long
2 screws 0.314 inches tong
2 screws 0.374 inches long
2screws0.5 inches long
2 distances bushes 0.137 Inches long
2 mounting screws
Setting of Stylus Pressure
Setting of the stylus pressure is achieved by means
of the two weights (1, 5) at the rear end of the tone-
arm. The large weight (1) is used to balance out the
tonearm, whilst the small weight (5) is used to set
the stylus pressure.
1.
Place
the
small
weight
right
at
the
back
of
the
outrider.
2.
Balance
out
the
tonearm
by
moving
the
large
weight
(1) along
the rear end of the arm until
the
arm floats
parallel
to the record.
3. The recommended stylus pressure for the parti-
cular cartridge being used is then set with the
small weight (5). Stylus pressure is increased by
moving the weight forward from its null point at
the end of the outrider. Each notch on the out-
rider represents 0.5 P. (P = pond which is equi-
valent to grams). In order to minimise distortion
we suggest that too low stylus pressures be avoi-
ded. We recommend that the stylus pressure be
set to about 20% below the maximum pressure
advised by the manufacturer of the particular
cartridge being used. Extremely low stylus pres-
sures should also be avoided in order to reduce
record wear, as such low pressures tend to
cause the stylus to rattle in the record groove.
thus causing unnecessary record wear.
Table 1 of this instruction booklet contains details
of the best stylus pressures and details of the styl-
us dimensions of a range of pick-up cartridges.
To
set
the
Arm
Lifting
Device
1.
Place
a
record
onto
the
turntable.
2.
Move
the
tonearm
gently
by
hand
until
the
needle
of
the
cartridge
is
just
above
the
first
groove
of
the
record.
3.
Move
the
arm-lifting
device
(8)
forward,
4.
Turn
screw
(25)
on
arm-lifting
device
until
the
distance
between
it
and
the
rubber
nipple
on
the
tonearm
is
about
2mm.
5.
Place
the
pick-up
arm
on
to
the
pick-up
rest
(9).
The
needle
of
the
cartridge
must
not
touch
the
On/Off
switch
(12).
If
necessary
adjust
the
height
of
the
pick-up
rest
by
loosening
the
screw
in
the
bush
at
its
base.
Electrical Connection
The
shielded
pick-up
cable
(37)
is
provided
with
2
standard
plug
which
can
be
connected
to a
loud-
speaker
or
radio.
This
connection
is
indicated
as
«GRAMMO»,
«TA»,
«PICK-UK»
or
«Q»
on
the
radio.
Later
models
of
amplifiers
or
radios
of
European
origin
have
been
fitted
with
a
standard
socket
which
fits
the
L
78.
To
connect
to
other
or
older
modeis
with
different
sockets
a
shielded
interme-
diate
cable
should
be
used.
When
the
unit
has
been
connected
(38)
to
the
electric
mains
it
is
ready
for
use.
Anti-Skating Device
Modern
pick-up
design
for
geometrical
reasons
re-
sults
in
a
force
being
imparted
on
to
the
stylus
of
the
pick-up
cartridge
by
the
record,
which
pulls
it
towards
the
centre
of
the
record.
This
force
is
cal-
led
skating
force.
Its
effect,
especially
with
low
sty-
lus
pressures,
is
to
cause
the
stylus
to
jump
seve-
ral
grooves
when
the
arm
is
set
on
to
the
record.
The
different
pressures
on
the
two
sides
of
the
groove
caused
by
the
skating
force
also
introduce
a
certain
amount
of
distortion.
This
distortion,
as
well
as
the
jumping
of
the
stylus,
can
be
avoided
when
the
skating
force
is
compensated
for.
For
this
ear
an
anti-skating
device
is
supplied
with
the
rm.
Heavy
Type.
Assembly
of
the
anti-skating
device
on
tonearm:
3
Fig. 1
Press
bent
steel
rod
(3)
in
hole
«A»
on
top
of
tone-
arm.