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Heathkit RA-1 - Assembly Procedures; Dial Drive Cord and Pointer Installation; Assembly of Miscellaneous Components

Heathkit RA-1
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—
be
1
fii
OTD
A
a
oe
eee
eres
ee
a
1 a
fae
at
er
termings,
0b
on
s0i0der
lags
Pointing
upwards
and
reilt
the
nut
and
wash
washers
and
nuts
and
tighten,
Y)
Connect
the
GREY
wire
from
grommet
GB
to
tag
1
(+)
terminal
of
the
meter
(NS).
a
Connect
the
BLUE
wire
from
grommet
GB
to
tag
Z
{-)
terminal
of
the
meter
(N5).
(x4
Connect
a
1
KO
resistor
(BROWN,
BLACK,
RED)
from
tag
1
(S-2)
te
tag
2
(S-2
5
—
FITTING
DIAL
DRIVE
CORD
AND
POINTER
Refer
to
Pictorial
3
for
the
following
steps:
(
A
Set
the
3-gang
capacitor
fully
meshed
and
set
the
slot
in
the
dial
drive
drum
in
the
12
o'clock
position.
Tem-
porarily
tighten
screws.
(
4
Locate
the
dial
cord.
and
tie
a
@
loop
in
one
end
approximately
1"
from
the
end.
Place
this
loop
over
the tab
on
the
disl
drum
se
she
Ene
G12.
2Pum
22
3no
(,)
Referring
to
Pictorial,
finish
stringing
the
dial
cord
on
the
dial
drum,
dial
back
plate
pulleys,
and
thence,
through
hole
in
chassis,
take
24
turns
around
drive
spindle
and
return
around
drum.
Tie
the
dial
cord
spring
to
the
free
end
of
cord
and
attach
to
tab
on
dial
drum.
Do
not
place
too
much
tension
upon
spring.
Cut
off
ex-
tess
cord.
(;}
Check
that
the
3-gang
capacitor
is
fully
meshed
when
the
slot
in
the
dial
drum
is
at
the
12
o'clock
position.
If
necessary,
slacken
the
locking
screws
and
adjust
the
dial
drum
onthe
spindle,
At
this
point
ensure
that
the
face
of
the
dial
drum
is
approximately
1/16"
clear
from
the
front
edge
of
the
chassis
aperture.
Finally
tighten
both
locking
screws.
(
A
Set
the
right-hand
edge
of
the
pointer
body
level
with
the
right-hand
edge
of
the
dial
back
plat
through
the
slots
in
the
pointer
as
shown
by
Pictorial.
>
od
7
ay
i
_
I
ho
la
=
ASSEMBLY
OF
MISCELLANEOUS
COMPONENTS
(/)
Place
a
flexible
shaft
coupler
on
the
spindles
of
capacitors
CA
and
AT.
(/)
Place
one
end
of
the
short
shaft
(ANT
TRIM}
through
the
hole
in
the
front
panel
and
into
the
open
end
of
the
er,
Ti
:
(
A
Place
one
end
of
the
long
shaft
(CAL
ADJ)
through
the
hole
in
the
front
panel
and
front
bracket
and
then
into
the
open
end
of
the
flexible
coupler.
Tighten
grub
acrew
in
the
coupler.
a
d.
Fit
a
smail
pointer
knob
to
each
of
the
control
shaits
with
he
knobs
ensuring
that
the
knobs
do
not
rub
on
the
front
panel.
:
Dlace
capacitor
tlates
of
CA
an
f?
Fide
Capac
PALE
wt
we
nd
ointers
upright.
Tighten
grub
screws
i
~
>
o
|
a
oo
(A
Set the
j-way
rotary
switch
5C
to
its
mid-position.
Fit
a
small
pointer
knob
to
ita
ahaft
with
the
pointer
up-
right
(O
position),
Tighten
grub
screw.
(A
Set
the
NL
control
spindle
fully
anti-clockwise.
Fit
a
small
pointer
knob
to
the
shaft
with
the
pointer
at
MIN
position.
Tighten
grub
screw.
(A
Set
the
AF
and
RF
GAIN
controls
fully
anti-clockwise.
Fit
a
medium
pointer
knob
to
each
shaft
with
the
poin-
*
ter
at
OFF
and
MIN
positions
tespectively.
Tighten
both
grub
screws,
/)
Turn
the
BAND
switch
spindle
fully
anti-clockwise.
Fit the
remaining
medium
pointer
knob
to
the
shaft
with
the
pointer
at
10,
Tighten
grub
screw
(
}
Fit
a
large
knob
to
the
TUNING
shaft
and
tighten
grub
screw.
GLOUCESTER
Ry
aa
ele
see
ENGLAND

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