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Heathkit AR-14 - HOW TO GET THE MOST OUT OF YOUR RECEIVER

Heathkit AR-14
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( )
Set
the
controls
as
follows:
SOURCE
switch
to
PHONO@
•
TREBLE
control
to
maximum
counterclock-
wise.
BASS
control
to
maximum
counterclockwise.
VOLUME
controls
to
maximum
counter-
clockwise.
The
PHASE
and
TUNING
does
not
have
to
be
set.
( )
Plug
the
line
cord
into
a 105
to
125
volt
50/60
cps
electrical
outlet.
( )
Turn
the
Receiver
on
by
pulling
the
TREBLE
control
knob
out.
The
pilot
lamps
should
light.
( )
Slowly
turn
the
VOLUME
controls
clockwise
until
a
background
hiss
is
heard
from
both
speakers.
( )
Turn
the
BASS
control
clockwise
until
an
increase
in
low
frequency
rumble
is
heard
from
both
speakers.
Then
return
this
con-
trol
to
its
mid-position.
( )
Turn
the
TREBLE
control
clockwise
until
an
increase
in
high
frequency
hiss
is
heard
from
both
speakers.
Then
return
this
con-
trol
to
its
mid-position.
NOTE:
Each
input
on
the
rear
of
the
chassis
can
be
checked
by
inserting
a
metal
probe
(such
as
a
narrow
screwdriver
blade,
a
short
length
of
solder,
a
bent
paper
clip,
etc.)
into
each
input
socket
and
listening
for
a
hum
from
the
speaker.
The
left
channel
inputs
will
be
checked
first.
( )
Turn
the
VOLUME
controls
fully
counter-
clockwise,
and
be
sure
the
SOURCE
switch
is
in
the
PHONO @
position.
( )
Insert
the
metal
probe
into
the
LEFT
channel
PH
ONO
INPUT
socket
so
that
it
touches
the
inner
contact.
While
grasping
the
inserted
probe,
slowly
advance
the
VOLUME
con-
trols
a
few
degrees.
A
strong
hum
should
be
heard
from
the
left
speaker.
( )
Make
this
same
test
with
the
RIGHT CHAN -
NE
L PHO
NO
INPUT,
listening
for
a
strong
hum
coming
from
the
right
speaker.
( )
Turn
the
SOURCE
switch
to
@ AUX.
Page
47
( )
Test
the
LEFT
and
RIGHT AUX
INPUT
in
the
same
way. A
strong
hum
should
be
heard
from
the
left
speaker.
( )
If
the
Receiver
is
operating
normally,
con-
tinue
with
the
following
adjustments.
If
the
Receiver
does
not
appear
to
be
working
pro-
perly,
refer
to
the
In
Case
Of
Difficulty
section
on
Page
55.
( )
Connect
an
antenna
to
the
FM
ANT
terminal
strip
at
the
rear
of
the
Receiver.
Either
an
FM
or
VHF TV
antenna
can
be
used.
NOTE:
The
types
of
antennas
recommended
for
use
with
the
Receiver
are
described
on
Page
52
in
the
Installation
section.
)
Set
the
SOURCE
switch
to
@
FM.
Rotate
the
TUNING knob
until
an
FM
station
is
heard.
Tune
to
a
station
of known
fre-
quency,
preferably
one
that
is
near
the
center
of
the
dial.
( ) Hold
the
tuning
knob
so
this
station
stays
tuned
in;
then
move
the
dial
pointer
until
it
points
to
the
frequency
of
this
station.
( )
Place
the
OFF
-ON
switch
at
the
OFF
posi-
tion.
This
completes
the
Initial
Test.
The
IF
transformers,
ratio
detector
transform-
er,
and
the
FM
tuning
unit
have
been
prealigned
at
the
factory.
Therefore,
no
further
adjustments
should
be
needed,
and
you
may
proceed
to
the
FM
Stereo
Adjustments
section
on
Page
48.
However,
if
the
Receiver
does
not
seem
to
receive
that
station
as
cle:;i.rly
as
it
should,
perform
the
FM
Adjustments
steps
first,
to
obtain
peakper-
formance.
These
steps
can
be
completed
without
any
test
equipment.
If
any
difficulty
is
encounter-
ed
during
these
steps,
turn
the
Receiver
OFF
and
refer
to
the
In
Case
Of
Difficulty
section
on
Page
55.
FM
ADJUSTMENTS
Refer
to
Figures
4
and
5
(fold-out
from
Page
65)
for
the
locations
of
the
transformers,
coils,
and
test
points
that
are
called
out
in
the
follow-
ing
steps.
( )
Connect
a
short
jumper
wire
from
point
X
to
point
Yon
the
FM-multiplex
circuit
board.
"

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