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Heathkit SB-220 - Page 63

Heathkit SB-220
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Page 50
Refer to Pictorial 4-12 (fold-out from this page) for the
following steps.
(
vf
Connect the green-yellow transformer lead from
grommet AH to lug 8 of relay F (NS).
(J)
Connect a 13" blue hookup wire from lug 10 of relay
F
(S-I) to lug 1 of phono socket
X
(NS).
(
4
Connect a .02 ,uF disc capacitor from lug 1 (S-2) to lug
2 of phono socket
X
(NS).
(4
Connect a .02
,uF
disc capacitor from lug 1 of phono
socket
U
6-21 to lug 2 of phono socket
X
(S-2).
Connect 200 pF molded mica capacitors (#203) to tube
socket lugs as follows:
Tube
Socket Connect
to
and
Lug
(
Socket D, lug 4 6-1) Solder lug
E
6-1).
(
v/)
Socket D, lug
3
6-1)
Solder lug C1 (NS).
(d
Socket D, lug 2 (NS) Solder lug C2 (S-1).
(A'
Socket N, lug
3
6-11 Solder lug M2 (NS).
(
ff
Socket N, lug 4 (NS) Solder lug MI 6-1).
(4
Socket N, lug 2 (S-1) Terminal strip P, eyelet of lug
-
2 (S-1
).
(
V$
Connect a 1 mH RF choke (#45-4) from lug 2 of tube
socket D (S-2) to solder lug C1 (S-2).
(4
Connect a 1 mH RF choke from lug 4 of tube socket
N (S-2) to solder lug M2 (S-2).
(
4
Connect a .02 ,uF disc capacitor from lug 1 (NS) to lug
2 (NS) of terminal strip
B.
(4
Connect one lead of a 1000
G?
(brown-black-red)
resistor to lug 2 6-2) and the other lead to lug 3 (NS)
of terminal strip B.
(J(
Connect the cathode (banded) end of a germanium
diode (brownwhitebrown) to lug 1 6-3) and the
other lead to lug 3 (NS) of terminal strip
6.
(4)
Connect one lead of a 68 kS2 (blue-gray-orange) 1 watt
resistor to lug 3 of terminal strip B 63). Hook the
other lead of this resistor around coaxial connector A
1
as shown in inset drawing 1 of the Pictorial (S-I).
HOOK
Detail 4-12A
(4
Refer to Detail 4-12A and form a 3" length of bare
wire as shown. The hook should be just large enough
to fit around another piece of the same size of bare
wire.
(d
Refer to Detail 4-128 and connect the hook on the
end of the formed wire through hole S to lug 6 of
wafer 2 of switch CZ 6-41. Connect the other end of
this wire to lug 6 of relay F 6-11 as shown in the
Pictorial.
Detail 4-126
(
$
Refer to Detail 4-1 2C and form two 1" lengths of hare
wire as shown.
(
/)
Bend the capacitor lugs at H and
J
so they are
approximately centered in the
two
holes.
7---'
/
SMALL
HOOK
Detail 4-12C

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