Heathkit SW-717 Assembly page 31

Shortwave receiver
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I
CUT
THE CABLT
ACCORD
ING
TO THT
D
I['1ENS
IONS
BELOW.
PREPARE TACH END
AS
SHOWN.
IAKING
CART NOT TO CUT THE
OUTER
SHIILD
OF
VERY
THIN WIRTS, RIMOVE
THI
OUTER INSULATION.
COA4B
OUT
THt
SHITLD
\ryIRES AND
TWIST
THE[1
INTO
ONT
SIRAND.
REA4OVT
THE
INNTR INSULATIO.,
THiN
APPLY
A
SA4ALL
A['iOUNT OF SOLDER TO IHE
tND
OF
THI
INNER
LEAD-
Detail 178
( )
Refer
to
Detail 17B and
prepare
two
9"
single
conductor
shielded cables,
Comb
out the
shield
wires
to
expose
the
center
conductor,
and
twist
the
shield
wires
tightly
together
as
shown. Melt
a
small amount
of
solder on
the
ends
of the twisted
center conductors.
( )
Cut
off
the
shield wires
at
one end
of
one
of
the
shielded
cables. Connect
the
center conductor
at
this
end
to
lug
1
of
bandswitch wafer
#1
(S-1
).
Pass
the
other
end
of
this
cable
under
switch
C
and under the
blue wire
from
lug 2
of terminal
strip
BF.
Connect
the
center conductor
to
luq 1
(S-1)
and
the
shield wires
to
the
braid
on
lug
2
(S-1)
of terminal
strip
X.
( )
Cut
a
4-314" length
of
yellow
hookup
wire.
Remove
1
/4" ol
insu
lation from one end and
2-1
14"
ot
insulation
from
the other
end.
( )
Push
the
2-1
14"
bare
end
of
the hookup wire through
lug 12
of
wafer
#2 of
switch
C (NS), and
through
lug
11R
(S-2)
to
lug 11F
(NS)
of
switch wafer
#1.
The
other
end
of
this wire
will
be
connected later.
Refer
to
Pictorial
18
for
the
following
steps.
( )
Prepare
the following
lengths
of
yellow
hookup
wire
1-114"
2"
a'.
3-112"
3-114"
Wire
the
lugs
on
therear of
wafer
#1
of
switch
C
as
follows
( )
Connect
the yellow
hookup
wire
coming
from
lug
21
to
hole
Z on
the
circuit
board
(S-1).
( )
Connect
rhe
1-1
14"
hookup
wire
from
lug
2
(S-1) tc
hole
AA
on the
circuit
board
(S-1).
()
(t
()
()
()
(t
Connect the
2"
hookup
BB
on
the
circuit
board
wire
from
lug
4
(NS)
to hol:
(s-1 ).
Connect
the
3"
hookup wire
from
lug
6
(NS)
to hol:
CC
on
the
circuit
board
(S-1).
Connect
the
3-1
12"
hookup wire
to
lug
4
(S-2).
Pass
the
other
end
of
this wire
under the
switch
shaft
anc
connect
it
to
lug
4
of
dual
trimmer
AH
(S-1).
Connect
the
3-114" hookup wire
to
lug
6
(S-2).
Pass
the
other
end
of
this wire
under
the
switch shaft
anc
connect
it
to
lug 3
of
dual
trimmer
AH
(S-1).
At
one end
of
the
remaining
9"
single
conducto"
shielded cable,
connect the center conductor
to
lug
E
(S-1
).
Wrap the shield wires around
the
bare
wire goin;
tolugllR(S-1).
At
the free end
of
the
shielded
cable
in
the
precedin;
step,
cut
off
the
shield wires
only.
Then
pass
this
enc
over
the
switch
shaft
and under
the
long blue
wir:
coming
from
lug 2
of
terminal strip BF.
Connect
th:
center conductor
to
hole
J in the
circuit
board
(S-1
2"
4"
5"

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