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Heathkit SB-220 - Page 57

Heathkit SB-220
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48
Connect the following transformer leads coming from
grommet Y to switch
AN:
Lead
Lug
of
Switch
AN
(
4
Black-yellow
1 6-1
1.
(
d
yellow
5
6-1).
(
vf
Blue 6
(S-1).
J
(
Black-red
2 (S-1
).
(4
Connect a
2"
black hookup wire from lug
3 (S-2)
to
lug
1 (NS)
of terminal strip BT.
(4
Connect the yellow hookup wire from grommet T to
lug
1
of phono socket
U
(NS).
(
d
Connect the orange wire from grommet
T
to lug
2
of
terminal strip BT
(NS).
(4
Prepare a
4-114"
length of large black stranded wire.
CONNECTOR
TAR
BARE WIRE SMALL
CONNECTOR TAB
(
#432-66
)
WITH
CLEAR SLEEV ING
I
CRIMP OVER
INSULATION
SOLDER
Detail 4- 10B Detail 4-10C
Refer to Detail
4-106
for the next two steps.
(\;')
Locate the large connector tabs
(#432-137).
If these
tabs are connected to one another, cut the strip of
tabs into six individual tabs as shown.
(J)
Install one of these large connector tabs
(#432-137)
on one end of the
4-1 14"
wire
(S-1
).
Refer to the Pictorial for the following steps.
(
4
Push the connector tab from the preceding step onto
lug 3 of switch
Z.
Connect the other end of this wire
to
double lug
AW (NS).
(
Connect the black lead from grommet
AK
to double
lug
AW (NS).
f
I
Connect the black lead from grommet Y to double lug
AW (NS).
(
)
pre&meng!hI?f stranded wire.
Place
1
"
len
htaf
larkdea
s
evhg
on orle end of
this
wire.
( )
In all a
s
,
all connector tab
(#
32-6 on end of
the wireb h
tt$&$Ic'
eevid
on/c T n ush the
Lhlfway
ckkl$
.shown
,
clea
sl
in De
11
4-10C.
ill
be
(4
Connect the center conductor of the coaxial cable
1
coming from lug
7
of switch
CZ
to lug
1 (NS)
and the
shield wires to lug
2 (Sl)
of terminal strip
AG.
Detail 4-10D
1'
h
)
Refer to Detail
4-10D
and prepare a
14"
length of
RGSIU
coaxial cable. Tin the exposed braid at each
end, being careful not to melt the inner insulation.
Idloosen the cable clhrp at
G,
place the shield braid
under the clamp, and connect the center conductor to
lug
9
of relay
F
(S-I
1.
(
.d'Similarly, place the shield braid at the other end of the
cable under cable clamp B and connect the center
conductor to coaxial fitting
A 6-1
1.
(
*
)
Tighten both cable clamps and solder the shield braid
at each end of
its
cable clamp. Be careful not to melt
the inner insulation.

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