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Heathkit SB-220
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32
#6
SOLDER
LUG
TuDchnrn
CT,,~
I~RL~UCV
>IUV\I
FLAT WASHERS
I
NS'ULATOR
1-118''
TAPPED SPACER
6--32
x
114"
BINDER HEAD
SCREW
Detail
4-5C
(
df
Refer to Detail
4-5C
and install a ceramic feedthrough
insulator
(#71-2)
at
CK.
In addition to the parts in the
plastic bag, use a
1-118"
tapped spacer, two
#6
solder
lugs, and a
6-32
x
114"
binder head screw. Before the
spacer
is
screwed onto the threaded stud running
through the insulator, hold the brass spring down so
it
will bear against the under side of the installed spacer
as shown in the Pictorial. Discard the two unused nuts.
NOTE:
In the following steps, wires will be connected
between wafer
2
of switch
CZ
and the taps on the plate
coil. Each wire should be fitted before
it
is
soldered in place.
The end of each wire going through the switch lugs must
first be flattened as shown in the inset drawing of Detail
4-5E.
DO NOT use the switch lugs to hold one end of the
wire when forming
it,
as the switch lugs and the ceramic
switch wafer can be damaged.
Detail
4-5E
When soldering wires to the switch, make sure the wire is
Refer
to
Detail
4-5~
and
connect
bare
wires
from
wafer
2
of
sohdered toboth switch lugs. After you
fit
the
cut
rotary switch
CZ
to the taps on the plate coil as follows:
Be
any excess wire lengths.
sure to connect to both lugs at each switch position:
Refer to Detail
4-5D
for the switch lug numbering system.
The Detail shows the switch rotor as
it
was positioned when
Wire
Switch
Coil
the shaft was installed (viewed from the rear).
Length
Lug
No.
Tap
Detail 4-5D
(
112 6 INS) 4 (S-1)
(
-12
.
56-3)
3 (S-1)
(,A
3"
4
(S-3) 2 (S-I
1
(
3-112" 3 (S-3) 1 (NS)*
"Extend the wire
114"
through the solder lug as shown in
the upper inset.

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