Heathkit HD-1250 Manual page 26

Page 24
Refer to Pictorial
3-3 for the following
steps.
( )
Place the small round
knob
onto the
shaft of
control R1. Be
sure the
center
hub
is
up, and that the
flat in
the
knob
matches
the
flat
on
the
control
shaft.
Press the
knob
as far
down
onto
the shaft as
you
can.
PICTORIAL
3-3
Refer
to Detail
3-3A
for the following steps.
( )
Turn
the tuning capacitor shaft clockwise
until
the plates are fully
meshed.
{ )
Place the fiber
washer onto
the tuning capacitor
shaft.
NOTE:
Keep
the
large
round knob
dial
surface
free
of
grease,
hand
oiliness, or
film.
( )
Start the
8-32 x 1/4" setscrew
into the
hub
on
the large
round knob
as
shown.
{
)
Place the
large
round
knob onto
the tuning capacitor shaft, center
hub
down,
as
shown
in the Pictorial. Position the
knob on
the shaft so the
setscrew faces the
right side
of the
chassis.
Then
tighten the setscrew.
NOTE:
In
the following
step
you
will be instructed to
mount
the dial label
on
the large
round knob. Carefully read the instructions and do
not press the
label
in place until
you
are sure
it is
correctly positioned.
( )
Mount
the
dial label
on
the
large
round knob
as follows,
and
as
shown
in
the
Pictorial.
1.
Turn
the tuning capacitor shaft until the plates are fully
meshed.
2.
Draw
a
small pencil
mark on
the top of the
chassis, at
the rear of the
large
knob, and equally centered between the
sides of
the
chassis.
3.
Position the
dial label as
shown
(do
not remove the paper backing
yet).
Observe,
in
the blue outer edge, the
"50"
at
one
end. This
50
in
the blue
band
is
the
dial
index. Position
the 50-index so
it is
directly
in line
with the
pencil
mark on top
of
the
chassis
(see
Step
2,
above).