Heathkit GR-54 - Oscillator Coil Calibration; Band A Calibration; Band B Calibration; Band C Calibration

Page 48
NOTE: A check will now be made on each band
to see if the metal bottom plate has caused the
inductance of the oscillator coils to change, This
change
could
cause
a
station
to
indicate
to
the
left
or
right
of
its
correct
number
on
the
dial,
Set the front panel controls as follows:
BANDSPREAD, ,..,adjustfor aSET (0 position)
indication on the Bandspread dial,
AF GAIN .. wees eee e ees ee e Midposition,
RF
GAIN,
..eccccscccce
ee
full
clockwise,
ANT
TRIM,
..
wee
eecsc
ce
full
clockwise,
MODE, . 2. uo 6 0 tw eee cece ee eens AM,
AVC
oe?8F
cece
rece
ccceceescsenee
ON,
aare
ANL, «eee cc ee cece seeaneeesves UIs
OPR, . wee sc cc reece cee eceecece REC,
External antenna plug goed in,
In any of the following groups of steps, if the
MAIN TUNING dial pointer points to the correct
frequency when a station is tuned in, no adjust-
ment is necessary for this Band, However, if the
dial pointer does not indicate the correct fre-
quency,
perform
the
coil
adjustment
under
the
heading
for
that
Band,
Refer
to
Pictorial
22
ior
the
oscillator
coil
identification,
———O
P33.
.
Ohe—#
40-656
Ou—# 40-655
Q—#40-654 ©
Qu 840-653
| |
| |
; on
_
|
Ga HesTHERIT
BAND A
(
)
Turn
the
BAND
switch
to
A.
Most
stations
heard
on
this
band
are
aeronautical
or
marine
navigational
signals,
A
phone
call
to
a
local
airport
will
diclose
whether
a
beacon
is
working
in
the
vicinity,
and
its
frequency.
( ) Turn the MAIN TUNING until the dial
pointer points to the correct frequency for
this station,
( ) Adjust coil #40-653 until this beacon station
is heard at its correct dial setting,
BAND B
(
)
Turn
the
BAND
switch
to
B
and
tune
ina
local station of known frequency, Turn the
MAIN TUNING until the dial pointer points
to the correct frequency for this station,
( ) Adjust coil #40-652 to the left or right
until the correct station is heard,
BAND C
( ) Turn the BAND switch to C and the MAIN
TUNING so the dial pointer is at 5 mc,
{ ) Adiust coil #40-656 until the WWV or
WWYVH signal is heard,
{ } Turn the BAND switch to E and adjust h
MAIN TUNING so the dial pointer is at 15
mc,
NOTE:
If
stations
WWV
or
WWVH
cannot
be
found
near
15
mc,
tune
toa
signal
of
known
frequency
on
the
Amateur
Band
(14,0 me to 14,35 mc) or on the Citizens
Band (26.965 mc to 27,710 mc).
(
—
Adjust coil #40-654 until the correct fre-
quency is heard,
BAND D
( ) Turn the BAND switch to D and
rrr TRITATS = 3 7
TUNING so the dial pointer is
ae
oO
5
B
(
)
Adjust
coil
#40-655
until
the
WWV
or
WWVH
signal
is
heard,