Heathkit GR-54 - Operation; Front Panel Controls

Gag e4tTHKiT
(
)
Turn
the
MAIN
TUNING
so
the
dial
pointer
is
at
5
mc
on
Band
D,
If
station
WWV
or
WWVH
is
heard
at
5
me
disregard
the
follow-
ing
steps,
However,
if
the
station
is
not
proceed
with
the
following
steps,
(
)
Turn
the
MAIN
TUNING
slightly
to
the
left
or
right
of
the
5
mc
mark
until
the
station
OPERA
es.
Before
attempting
to
use
the
Receiver,
carefully
read
the
front
and
rear
panel
explanations
to
learn
the
functions
of
each
of
the
controls,
switches, and connectors,
FRONT PANEL
_AF
Gain
~
Turns
the
Receiver
on
or
off,
Varies
thea
londnesa
of
the
sound
from
the
speaker
Ot a ee dal
or
headphones
by
controlling
the
amount
of
audio
amplifier
gain,
RF Gain - Varies the loudness of the sound
from the speaker or headphones by controiling
the amount of RF amplifier gain, NOTE: It
may be desirable to set this control toward full
counterclockwise
on
strong
LSB
and
USB
sig-
nals
for
best
fidelity,
Mode - Selects the following types of reception:
AM (amplitude moduiation), USB (upper side
band), LSB (lower side band), CW (continuous
wave) ean be heard in either the LSB or USB
SP Weeks Bee seer ff, ELUM? re in
position,
Band
-
Selects
one
of
five
frequency
bands:
A,
B,
c,
D,
or
E,
Ant Trim - Provides a means of peaking the
antenna circuit to the signal being received,
Main
Tuning
Tunes
the
Receiver
to
the
desired station,
is
heard,
Now
turn
the
MAIN
TUNING
so
the
dial
pointer
is
between
this
point
and
the
5
mc
mark,
(
)
Adjust
coil
#40-655
until
the
WWV
or
WWVH
signal
is
heard,
This
will
split
up
any
error
between
the
5
mc
and
10
me
dial
markings,
TION
Bandspread - A fine tuning adjustmen
used in conjunction with the Main Tuning to help
separate close-together signals on crowded fre-
DR ES Ue ee
quency bands, This control is normally left in
the SET position, when not in use, since it
affects
the
main
dial
calibration,
It
will
seldom
be necessary to use this control on Bands A and
Bb
AVC
—
Automatic
Volume
Control,
The
AVC
circuit
automatically
adjusts
the
volume
level
to
compensate
for
changes
in
signal
strength,
It
also
reduces
the
effect
of
"blasting''
when
a
strong
signal
is
tuned
in,
Leave
this
switch
in
the
ON
position
except
when
listening
to
very
weak
stations
on
Bands
C,
D,
and
E.
ANL
-
Automatic
Noise
Limiter,
Limits
static
and
ignition
noise
when
in
the
ON
position,
Turn
this
switch
to
ON
only
when
noise
limiter
action
_is
desired,
When
a
strong
signal
is
tuned
in,
turn
the
switch
to
OFF
to
prevent
distortion,
Opr
-
This
switch
has
two
positions;
REC
(re-
ceiver)
and
STBY
(standby).
For
normai
Re-
ceiver
operation,
use
the
REC
position,
To
keep
the
Receiver
warmed
up
and
reatly
for
in-
stant
use,
switch
to
the
STBY
position,
Tuning
Meter
-
Provides
meter
indication
for
precise
signal
tuning.
AVC
switch
must
be
set
to
the
ON
position
to
allow
this
meter
to
be
used,
For
maximum
meter
deflection
the
RF
GAIN
must
be
in
the
full
clockwise
position,