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Heathkit SB-220 - Page 38

Heathkit SB-220
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I
c-1
Page
31
I
/
WAFER
1
Detail
44A
I
Detail
4-5A
Refer to Pictorial
4-4
for the following steps. For clarity,
Refer to Pictorial
45
(fold-out from Page
28)
for the
only the coil mounting shield is shown.
following steps.
(J;
Start the ends of the two coaxial cables coming from
(A
Refer to Detail
4-5A
and connect the free end of the
wafer
1
of switch
CZ
down through grommet
T,
and
500
pF mica capacitor at CE to lug
12
of rotary
lower the input coil assembly down onto the chassis.
switch
CZ
wafer
2 (S-3).
Be sure the capacitor lead
is
Pull the two coaxial cables through the grommet as
soldered to both lugs.
you lower the assembly.
Refer to Detail
4-5B
for the next two steps.
(tfl)
From the bottom of the chassis, install
#6
sheet metal
(
4
Install two
1-118"
tapped spacers on the
80120
plate
screws at
CH
and
CJ
into the coil mounting shield.
coil
(#40-597).
Use
6-32
x
114"
binder head screws.
contact any part on switch CZ.
(4
Make sure none of the
pm
on terminal mip BE
(
Mount the plate coil as~mbly at CB and
CC
on me
inside of the RF shield. Be sure to position the coil so
the taps are on the side toward the brass spring. Use
1
112"
flat washers and
6-32
x
318"
flat head screws.
(6
Install a
#6
sheet metal screw and
a
#6
solder lug at
CF. Note the position of the solder lug.
(d
Install a
#6
x
318"
sheet metal screw at
CG.
id
Refer to Detail
4-4A
and connect the free lead of the
.001
disc capacitor from lug
7
of the switch wafer to
lug
1
of terminal strip BE
(S-3).
6-32
x
114"
BINDER HEAD
Detail
4-5B

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