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Heathkit HW-12 - Page 24

Heathkit HW-12
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CHASSIS
WIRING-BOTTOM
Refer
to
Pictorial
13
for
the
following
steps.
Netail
123A
inctall
anider
aCe
dee,
ARI
ee
SULTS
(\/)
Referring
to
terminals
in
the
circuit
board,
from
the
foil
ai
lettered
‘locations,
except
holes
A, B,
C,
at
the
forty-five
numbered
and
air
ins
talling
‘the
terminals,
“Do
not
solder
these
terminals
to
the
circuit
hoard
at
this
time,
When
soldering
these
terminals
later,
be
sure
that
solder
flows
into
and
around
the
terminal,
IN
I
Detail
13A
STOP
i
RIDGE
.
we
the)
ef
fy
_<s
eur
ore
ad
al
Wale
ae
a
—
vo
it
cuT
send
q
v
y
EXCESS
LEAD
AFTER
SOLDERING
NOTE:
Use
hookup
wire
for
the
following
steps.
Strip
5/8"
insulation
from
the
ends
of
the
speci-
fied
lengths
of
wire
that
connect
toterminals,
and
1/4"
insulation
from
the
other
wires,
i
A
(~)
Connect
a
2"
wire
between
points
D
in
section
3B
of
the
circuit
board,
Solder
the
wire
directly
to
the
foil
and
position
the
wire
about
1/4"
away
from
the
board.
(,
)
Connect
one
end
of
a
2"
wire
to
terminal
J
“
in
section
5A
(S-1).
The
other
end
will
be
connected
later,
Be
sure
to
solder
the
termi-
nal
to
the
circuit
board
foil
when
soldering
the
wire
to
the
terminal,
Wp
Connect
one
end
of
a
6"
wire
to
terminal
H
in
section
4A
(S-1).
Pass
the
other
end
through
grommet
AA
to
be
connected
later,
()
Connect
a
3"
wire
from
terminal
S
in
sec-
tion
5C
(S-1)
to
lug
2
of
the
Revr
socket
(NS).
(.)
Connect
a
6-3/4"
wire
from
terminal
T
in
\}
Section
5C
(S-1)
to
lug
3
of
the
Final
Bias
control
(S-1).
()
|
@)
)
)
(
)
Tune
Level
control
(S-1)
to
solder
i
|
_
(NB).
Connect
a
1-1/2"
wire
from
terminal
M
ra
é
i
‘,
wy)
(()
V
Dp
ce
emmel,
/
control
(S-1).
|
Connect
a
5"
wire
from
terminal
R
in
sec
|
tion
4C
(S-1)
to
lug
2
of
the
Final
Bi
Connect
a
4-1/2"
wire
from
terminal
Q
i.
section
4C
(S-1)
to
lug
1
of
the
Final
Bi
control
(S-1).
..
Connect
a
5-1/2"
wire
from
terminal
U
ip:
section
4C
(S-1)
to
pin
1
of
the
Power
plug
(S-1).
|
|
APPLY
SOLDER
TO
APPLY
SOuvER
TIP
OF
PREHEATED
FIN,
SOLDER
WILL
LOW
INTO
PIN
FE:
eA
CAPILLARY
ACTION
a
AS
Detail
13B
Connect
a
2"
wire
from
lug
2
of
the
Power
plug
(S-1)
to
lug
1
of
the
Revr
socket
(NS)
Connect
a
2-1/2''
wire
from
lug 2
of
ne
section
1C
(S-1)
to
lug
2
of
the
Mic
Ga
control
(S-1).
Position
the
wire
as
shown
Connect
a
2-1/2"
wire
from
terminal
L
he
section
2C
(S-1)
to
lug
3
of
the
Mic
Gai
control
(S-1).
C15,
Connect
a
.02
fd
disc
capacitor
‘rofl
lug
1
of
the
Mic
Gain
control
(NS)
to
solde
lug
AD
(NS).
Position
the
capacitor
as
shown,
Saal
C10,
Connect
a
.005
pfddisc
capacitor
trou
lug
2
of
the
Mic
connector
(NS)
to
soider
AD
(NS).
Use
sleeving
on
both
1cads
R13.
Connect
a
1
megohm
resistor
(row
innn
black-green)
from
terminai
i
in
section
i
(NS)
to
lug
1
of
the
Mic
Gain
control
7)
Use
sieeving
on
the
lead
to
the
control
ieee
=
oo
a
ee

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