Heathkit HR-10B - Alignment; IF Transformer Alignment and Meter Zero Adjustment

! •
Detail
4A
( ) R2. Connect a 1 megohm
(brown-black-
green)
1/2
watt
resistor
from
lug
2 of
terminal
strip
R (S-3)
to
lug 1 of tube
socket
V1
(NS).
Use
sleeving
on both
leads.
( )
Locate
the
remaining
pilot
lamp
socket
and
place
its
lead
through
grommet
HG
from
the
top of the
chassis.
Connect the
end
of
this
lead
to
lug
4 of tube
socket
V1
(S-3).
FRONT
END
MOUNTING
Refer
to
Detail
4A
for
the·
following
steps.
( )
Place
the
short
end
of
the
2-1/2"
dial
drive
shaft
through
bushing
F
J
from
the
front
side
of the
front
panel.
(
Place
a
formed
spring
brass
washer
over
the end of
the
shaft
extending
through
the
front
panel.
Start
an
8-32
x
1/4"
setscrew
in
the
collar.
Place
the
collar
over
the
end
of .the
dial
drive
shaft.
Do
not
tighten
the
setscrew.
( )
Start
two 6-32 x
5/16"
setscrews
in
the
fly-
wheel.
Place
the
flywheel
over
the
_end
of
the
( )
(
)
(
Page
25
dial
drive
shaft
until
the
front
edge
of
the
flywheel
is
flush
with
the
rear
edge of
the
dial
cord
slot
in
the
shaft.
Now
tighten
the
two
setscrews
in
the flywheel.
Place
the
remaining
formed
spring
brass
washer
and the
flat
nylon
bushing
over
the
end of
the
dial
drive
shaft.
Referring
to,
Detail
4A, and
Pictorial
4
(Page 26),
plake
the
front
end
assembly
into
place.
Be
sure
that
the yellow
wire
extending
from
wafer
1
of
the
BAND
switch
passes
through
grommet
HF,
the
short
yellowwire
from
wafer
3
passes
through
grommet
HE,
and
the
yellow
wire
from
wafer
5
passes
through
grommet
HD.
Secure
the
assembly
with #6
lockwashers
and 6-32
nuts.
Dress
the
"free end of
the
remaining
wires
and
component
lead
as
shown.
Before
tighten-
ing
the
mounting
hardware,
be
sure
that
all
wires
are
.
out
from
under
the
front
end
assembly.
Hold the flywheel
tight
against
the
front
end
assembly
and
push
the
collar,
on
the
dial
drive
shaft
against
the
formed
spring
brass
washer
and
tighten
the
setscrew.