Bentley R Type - Page 108

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To
obtain
access
to the
bulb, detach
the
front
portion
by holding
firmly,
and
rotating
the
rear
portion a quarter
of
a
turn to release
the
spring
catch
(2).
The
bulb
is of
the standard
bayonet
fitting type.
To
replace,
reverse the
above
instructions.
Radio.
"His
Master's
Voice"
automobile
radio
equipment is fitted
in
the
Bentley
car.
The
receiver,
known as the
"Radiomobile"
llodel
4zoo,
has
a six-valve
superheterodyne
circuit designed for medium
and
long
wave
recePtion.
Fig.
5O
illustrates
the controls.
The
combined Volume
Control
and
"On
/Ofr"
Switch is on
the
left
of
the
five
push-buttons. This
control switches
the
receiver
on when
turned
clockwise,
and
progressive
rotation
of the
control
increases
the
volume.
Turning
the control fully
anti-clockwise
will switch
off
the
receiver.
Allow about
40
seconds
for the receiver
to
"warm-up"
after
switching
on.
Yolume Control
and
Oll/0fF Switch
Tuning
Push
Buttons
llanual Tuning
(ontrcl
Fig. 50.-THE RADIOMOBILE
CONTROLS.
The
Tone Control
is concentric
with the
Volume
Control
and
"On/
Off" Svitch
and provi$ts
selective tone
correction
for
reproduction of
either
speech or
music,
by
four
separate
tone
settings. The
control
is
turned
fully
anti-clockwise
for
speech and
fully clockwise for
music,
the
two intermediate settings
being provided
to
suit
individual
taste.
The Manual
Tuning
Control is on the right
of the
push-buttons
and
provides
completely variable station
selection.
A
feature
of
this control
is
that the knob
will
not engage the tuning
mechanism
until
it
is
pressed
in;
otherwise the
knob
will
"idle".
This
prevents
accidental disturbance
of
a
station-setting
previously
selected by
a push-button,
The
five
Tone bntrol