QUAD 33 - INITIAL CHECKS AND OPERATION; Filters

INITIAL
CHECKS
AND OPERATION
Before connecting
the
mains
supply,
ensure
that the
voltage
marked on
the
rear of the control
unit
and the
setting
of the selectors
on the
power
amplifier
and
tuner
are correct
for
your
mains.
These selectors
are set
by
withdrawing
the
cap
$",
rotating
it to the
required
voltage and
pushing
it fully
home again.
Then connect
the
mains and
rotate the
volume
cantrol to
switch on
the equipment.
The
Quad
33 nameplate,
the
Quad
303
indicator
light and
the tuner scale
should
now
light up.
Pushbuttons
(see
also
Filters)
The
input
(Radio
1, Radio
2,
Tap, replay
or Disc)
and
the service
(Stereo,
or
Mono on
left-hand speaker,
right-hand
speaker
or both),
are
selected
by
pressing
the appropriate
pushbuttons.
With Stereo
pressed,
all
inputs are connected
for
stereo
reproduction.
In the case of
radio,
the tuner
will
automatically
switch
to Stereo
when a stereo
signal
is
received,
reverting
to
Mono at all other
times.
Pressing
either
or
both
of the
Mon buttons will
reproduce a
mono
sigral
from Disc or
Radio
I whether
tle
programme
source
is mono or
stereo.
With
Radio 2
or
Tape inputs,
however,
apart
from selecting
loud-
speakers,
the Mon buttons also select
left or
righthand
inputs, each to
its own speaker.
In
addition,*
either
input may be
reproduced over both speakers
by
pressing
the Stereo button
as
well as the
<-Mon
or
Mon'+
button and,
of course,
Radio 2
or
Tape.
*
This
facility
wan not available
prior
to serial number
7500.
Volume Control
The volume control
is
advanced
to the appropriate
level, bearing
in mind that apart
from enabling a
level
of sound
to be
obtained
which
suits
the
listening con-
ditions
of the
moment, the
volume
control
also
has the
important function of
adjusting the
intensity of sound
so
that
it is correctly
related
to
the
perspective
of
the
recording or
broadcast.
This is
obviously
important for
realistic reproduction.
For example,
if a voice
is
picked
up close
to a
microphone
in
a
very absorbent studio,
then on
repro-
Page Thirteen