Operation Manual

original sound and newly
recorded one.
Remember
that
for reproductiorr of other
programme
sources than tape this
switch
as
well
as
the Tape fVonitor Switch(11) must be
set
at
the centre
"sourcel'
position.
lf
there are
2 |ape-recorders
reprinIing of tape is
feasible
also by other
method; Corrrrect
the
tape-recorder
of betler
recording
performance
to the
Recording
Output Terlrritrals
and otlrer one to
the AUX terminals
exclusively
for
play
back setting the
Input Selector
Switch to the relevatrt
pos
r tr on.
SIMULTANEOUS
PLAYBACK MONITORING
3-head
tape-recorder
ensures Sìmultarreous
Playback
Moni-
toring enabling to ascertain
perfect
recording,
In case of
3-head tape recorder
heads and amplif
iers
for recording
and
playback
exist independently
in the circr-rit
which
ensures simultaneous
recording on tape and
playback
of
the sourrd recorded
on the tape.
ln this case recording on tape and
playback
of the recorded
sound
is
practised
at the same time,
and
connection
flrLtst
be made
for
both
functions.
Need
to connect
the Record-
ing
Output Terminals(38)
to
the
Line
Input Termi-
nals
(AUX
Input)
of tape-recorder, and
the Tape
Monitor
Termìnals(39)
to
the Output Terminals
(LINE
OUf)
of the tape-recorder
and to set the
Tape Dubbing
Switch
at the
"source"
positon. The lv4onitor
Switch
(1
1
)
is
set at the
position
corresponding
to the terminals
lo which
the tape-recorder is
connected, and repetition
of
switching
between
"source"
and
"deck-1"
or
"deck-2"
makes it
feasible
to compare
the
original sound with
recorded
one.
Thus
possìble
recording error
can be
prevented
ìn case
ot
3-head
tape-recorder.
lnciderrtally
note
that
reproductiotr
of
recorded sound
becomes
a
lirtle bit
delayed as
compared
with
that of original
sound since
there
is a
gap
between
recording
head and
plaVback
head. Simultaneous
Playback
IVonitoring
can
be made
througl-r the
Tape Connector(32)
as
well. A single
DIN
patch
cord
ensures connection
for
recording and
playback,
and
simple operation of switching
between
"source"
and
"deck',l"
of the fVonitor Switch wìll
do.
SIMULTANEOUS RECORDI NG
This arnplif ier is
provided
with 2 sets of
Recording
Output
Terminals
(REC.
OUT)
enabling to record simultaneously
on 2 tape-recorders.
lf desired, combination recording on
open
reel recorders and/or
cassette recorders can be
enjoyed.
lVoreover
if the Tape Connector is
used recording
on 3 tape-recorders
is
possible.
Rernember that the Tape
Dubbing Sw¡lch(10)
rrrust be set at the
"source"
position.
This
facility
is useful
for
safer
printing
or effective record-
ing
etc.
As
the impedance
at
the Recording Output Termi-
nals
is kept sufficiently low
(about
100
ohms)
,
mutual
interference
wi ll be almost nil between the recorders
under simultaneous
operation.
ABOUT DIN TAPE CONNECTOR
The Tape Conrrector of this anrplifier is
provided
¿rt the
rear
panel
lor
convenient
connection. This is of DIN
norm.
As explained in the
paragraph
of Playback
frorr
Tape and
Recordirrg on Tape
,
if tape-recorclcr is equipped witlr DIN
connector,
corrDeclion
try
a DIN
patch
cord
suffices
for
rccording arrd
playback.
See lo it that
thìs connectiorr is
practised
orrly by
DIN COF D since
tlte impedance at
Fecordir.rg OLrtpul
Ter¡irlals is
kept relatively hìglt at
B0 Kohms
1
20 Kohms.
OPERATION
OF TONE
CONTROLS
TSELECTION
OF
MODE
(Conversion
of
Playback
Mode)
This
arnplif
ier
is for stereophottic
reproductiot-t arrd inte-
grates
independent
amplif
iers
f or 2 channels
(right
and
left).
Without
the
IVode Selector
the sìgnals
fed
to the
right
channel
terminal are
reproduced
at
the right clrannel
speaker.
The
Mode Selector
is
placed
between lhese
2 amplifiers
to change
the mode
of reproduction.
connectlon
¡nput
oulput
TCONTROL
OF
VOLUME
Sound
volume
can be
properly
adjusted by
volume control
ln
the
attenuation
characteristics
turnìng
angle
is
propor-
tionate
to attenualion
degree of dB, and
the dB value and
the
volume
audible
to human
ears
are
in the
porportionate
relation
That
is to day, the
rotation of
knob is
in
proportion
to the sound volume
felt
by human
ears.
The
increasing degree
of
volume
is felt
quite
natural as the
knob
is
turned
on to
the clockwise
direction.
TCONTROL
OF
VOLUME
BALANCE
ln
case
of deviation
between
the volume
levels
of right and
left
channels, adjust
unbalanced
volume
level by the
Volume
Control(12)
The
volume balance
of both
channels can be
adjusted
so
that monaural
disc sound
reproduced by the stereo
cartridge
comes
from
the
centre
of the right and
left channels
Usually
the
volume
level
of both
channels
is adjusted
identical
at the
straight
engraved llne on the
knob. lf a
programme
source
had
deviation of the volume
level between
2 channels,
establish
correct
balance
with this
balancer.
ITONE
CONTROLS
The
ultimate
purpose
of
the audio system
is
to make
the
high fidelity reproduction of
programme
sources. The
reproduction
conditions and
circumstances
do
not always
match with record¡ng
conditions,
and
it
is impossible
to reproduce
the same
sound
with the original
one
Also
there is
no
objective standard
to
judge
good
sound
from
inferior one. The
only
possible
solution is
for
every
listener to create hls
favorite sound according
to
his
own
taste. lt is
therefore
very
important
that the audio
system
offers
such
facility to
permìt
flexible
controls
for
creation
of the best sound.
TH is
receiver
is equipped
wìth
various
tone
controls
for
subtìe
and
minute
control
of
the
reproduced sound such as
Bass
Level
Control(17)
and
Treble Level
Control(19).
and
Liner
Fq'alizer(16)
Bass
Level
Control
is
a
tone control
on
frequency
response
of low frequency
range.
lt is designed
so
that response
is flat
at the electric centre
point,
and
a
clockwise
turn of
the
knob intensifies
low
frequency
range while
counter
clockwise turn
yìelds
attenuatlon
For
easy adjustmen
thìs control
is
equipped
with
11
points
of
click
stopper
IOPERATION
OF LOW CUT
FILTER
When this
filter\21)
is switched
on
the
amount
of
low
frequencies
you
hear
ls
reduced sharpìy at
the attenuatlon
rate
of
12dBloct
beìow 70H2.
Useful
for removal of
ìow
frequency noise such
as
rumbling of
phono
motor Also
this can be
used as
an
auxiliary
control
for Bass Level
Contro I .
IOPERATION
OF
HIGH
CUT
FILTER
When
this
filterl22)
is
swìtched
on the
amount of
high
frequency
range
over TKHz
is cut
off at the
attenuation
rate
of
12dBloct.
Useful
for
removal of
scratch
noise,
hissing
noise of
tape
etc. Also
this
can be
used as
an
auxiliary
control
for Treble
Level
Control.
IOPERATION
OF
LOUDNESS
Because
loudspeakers
and
ears
generally
respond less
to
extreme high and
low
(treble
and
bass)
frequencies as
volume
levels
are
reduced, the
LOUDNESS
switch
is
included
to boost
these
frequencies
and
thereby
provides
tonal
compensation.
Whether or
not
you
use this switch
depends
upon
the levels at which
you generally
listen,
the
kind of speakers
you
have, the
room acoustics
and a
number of
other variables.
Experimentation
is the best
guide
to
using
the LOUDNESS switch
ITHE
LINEAR
EOUALIZER
Although
recordings
are
equalized in accordance
with
B
iAA
standards,
it
is
quite
common
to encounter
variations
ìn overall
tonal balance
from one record¡ng
to the
next.
In addition, differences
in
listenìng
environment and
room
acoustics
often
require subtle
degrees of
tonal compensa-
tion
that conventional
tone controls cannot
correct
because
of their
wide range and
overlapping crossover
characteristics.
THE LINEAB
EOUALIZER
control
provides
a
new form
of
tonal
compensation specifically
intended
for
subtly
augmenting
regular
tone
controls. With the
control in
its mid-position,
f lat
f requency response
is achieved.
Switched
to
either of the two
"up-tilt" posÌtions,
the entìre
response
curve
ls
rotated about a 1 KHz
f ixed
axìs
so as
to
linearly
increase treble
response
whìle simultaneously
decreasing
bass response. Conversely, selection of
one of
the
"down-tilt"
positions
rotates the response curve
in a
clockwise
direction,
providing
a
gradual
decrease
of treble
response and
simultaneous
increase of bass
response.
Degree of slope
for either
positive
or negative
settings has
I
I
l.
I
I
I
I
l
i
I
performance USE
knob
posit¡on
R-R
L+L
normal
stereo
plavback
for normal stereo
playback
NORMAL
reversed
stereo
playback
when
program
source
is
reversely
connected
R R
L L
R
EVE
RSE
r¡ght
and left
input signals
are ¡ntegrated
for monaural
playback
of stereo
program
t\¡tx
R-B
.
l-t
LIN E
IN
LIN E
OUT
LIN E
IN
LINE
OUT
O
O:O
O.O
C)
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o
RECOR
DI NG
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O:O O
oooo
PLAY BACK
e
co
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12
13