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Heathkit HW-12 - Page 21

Heathkit HW-12
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ee
ESSERE
ET
Fo
ES
ET ES
SS
AS
ET
TS
RL
SY
TT
Sa
RR
ERTS
NE
EN
TE
RAE
A
a
ca
week
«/)
Install
the
control
at
the
Carrier
Null
location
in
section
1C.
Secure
the
control
with
a
1/4"
lockwasher,
1/4"
flat
washer,
and
a
1/4"
nut.
Before
soldering,
be
sure
the
control
lugs
are
aligned
with
the
foil.
(W
)
Install
the
small
knob
on
the
control
shaft
and
tighten
the
setscrew,
(y)
Place
3/4"
lengths
of
sleeving
on
the
leads
of
the
neon
lamp,
Install
the
lamp
at
NE
in
section
1B.
i
(J
C121,
Install
the
20
pfd
350
V
electrolytic
capacitor
in
section
3C.
Be
sure
toposition
the
positive
(+)
lead
of
the
capacitor
at
the
(+)
marking
on
the
circuit
board,
CAUTION:
The
inner
insulation
of
the
shielded
cable
melts
easily.
Therefore,
the
inner
con-
-
ductor
and
shield
should
be
soldered
as
quickly
as
possible
to
prevent
shorting
of
the
cable,
(
i)
Referring
to
Detaii
i0F,
cut
a
5-1/2"
length
of
single-conductor
shielded
cable
and
pre-
pare
it
as
shown,
(4)
Connect
the
prepared
cabie
from
point
A
in
section
1C
to
point
A
in
section
3C
of
the
circuit
board,
The
end
with
the
shield
is
connected
in
section
1C.
The
Fan
en
ne
ened
,)
ae
on
aL
inner
lead
BOSD
to
the
noe
with
dle
Circle,
2’)
Ta
a
lilkka
manner
ynereanave
5
201/91
langeh
of
S12
Ga
LAU
AMGULICL
bs
Cpalec
a
Velf~a
CHR
UE
‘of
single-conductor
shielded
cable,
(:)
Connect
the
prepared
cable
between
points
.
Cc
in
sections
1
A
and
3B
of
the
eireuit
board,
ete
2
Wat
WUE
Place
a
1/2"
length
of
sleeving
on
the
shield
of
the
cable.
and
connect
this
end
in
section
Meee
Swe,
Seeki
VULOOL
tba
Sisk
otk
SOULE
3B.
Insert
the
inner
lead
of
the
cable
in
the
circled
hole,
{
)
Prepare
a
6"
length
of
single-conductor
4,
shielded
cable,
Connect
the
prepared
cable
between
noints
B
in
sections
1B
and
3B
of
the
circuit
board,
The
end
of
the
cable
with
the
shield
goes
to
section
1B.
CUT
THE
CABLE
ACCORDING
TO
THE
LENGTH
SPECIFIED.
PREPARE
EACH
END
AS
SHOWN.
v2"
——
1"
:
CUT
OFF—
ie
>
172"
wlisarne-
CUT
OFF
SHIELO
TAKING
CARE
NOT
TO
CUT
THE
OUTER
SHIELD
OF
VERY
MM,
THIN
WIRES,
REMOVE
THE
OUTER
INSULATION.
ba
YOO
PUSH
BACK
THE
SHIELO.
THEN
MAKE
AN
OPENING
IN
THE
SHIELD
AND
BEND
OVER
AS
SHOWN.
PICK
DUT
THE
INNER
LEAD.
a
a
REMOVE
THE
INNER
INSULATION
AND
STRETCH
OUT
THE
SHIELD.APPLY
A
SMALL
AMOUNT
OF
SOLDER
TO
THE
END
OF
THE
SHIELD
AND
THE
INNER
LEAD.
USE
ONLY
ENOUGH
HEAT
i
THE
SOLDER
TO
FLOW.
——
Kx.
3
a
z
Detail
10F
‘
inting
of
all
ecamponents
on
the
top
(istered
a
sid
ie)
of
the
circuit
board,
Check
carefully
to
see
that
all
connections
are
soldered
and
that
there
are
no
solder
bridges
between
foils.
Set
the
circuit
board
aside
temporarily.

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