Heathkit SB-201 - Page 31

Page 30
IMPORTANT:
THE
BANDED
END
OF
DIODES
CAN
BE
MARKED
IN
A
NUMBER
OF
WAYS.
WZ
a
BANDED
END
Detail 7B
(
f
Refer
to
Detail
7B
and
connect
the
lead
from
the
banded
end
of
a
silicon
diode
#57-27
to
lug
6
(S-2)
and
the
other
lead
to
lug
5
(NS)
of
terminal
_ strip N.
f
(*}
Connect
the
positive
(+)
lead
of
a
2
wfd
elec-
trolytic
capacitor
to
lug
4
(NS)
and
the
other
a
to
lug
2
(NS)
of
terminal
strip
N.
(“)
Connect
a
10
kO
(brown-black-orange)
2
watt
resistor
between
lugs
4
(S-4)
and
5
(S-4)
of
ter-
minal strip N.
(
)
Connect
a
1.52
(brown-green-gold-
silver)
re-
sistor
between
lugs
2
(NS)
and
1
(NS)
of
termi-
nal
strip
N.
(
)
Connect
a
.02
wfd
ceramic
capacitor
between
lug
1
of
terminal
strip
N
(S-4)
and
solder
lug
M
(NS).
(°°)
Refer
to
Detail
7C
and
prepare
a
resistor
combi-
nation
using
three
4.7
megohm
(yellow-violet-
green)
1
watt
resistors
and
the
large
sleeving.
(-
)
Connect
this
resistor
combination
from
lug
2
of
terminal
strip
J
(NS)
to
point
B
on
the
foil
of
the
circuit
board.
Solder
the
lead
directly
to
the
foil.
Use
sleeving
on
the
lead
to
the
circuit
board.
4.7 MEGOHM 1 WATT
eee
PN
LARGE
SLEEVING
Detail 7C
oo“ & M 1
la,
ly
(INCHES)
2
3
1/8
,
3/8)
8/8,
7/8
Oo
8
1
(CM)
2
3
4
5
6
7
8
GegueatTHKitT:
(
va
Connect
a
15
kN.
(brown-green-orange)
resistor
between
lugs
1
(S-1)
and
2
(S-3)
of
terminal
strip
J.
This
Linear
Amplifier
may
be
operated
from
either
120
volts
or
240
volts
AC.
Perform
one
of
the
follow-
ing
two
steps,
depending
on
the
line
voltage
to
be
eas
to
the
inset
drawing
on
Pictorial
7.
(“%
For
120
volt
AC
operation,
connect
one
bare
wire
under
screws
1
and
2,
and
another
bare
wire
under
screws
3
and
4
of
terminal
strip
S.
(
)
For
240
volt
AC
operation,
connect
a
bare
wire
under
screws
2
and
3
of
terminal
strip
S.
WIRING — SWR BRIDGE
NOTE:
Position
the
chassis
on
the
rear
apron
for
the
following
steps.
(‘4
Refer
to
Pictorial
8
(Illustration
Booklet,
Page
6)
and
Detail
8A,
and
install
the
coaxial
cavity
using
4-40
x
5/16”
hardware
and
two
5/16”
steel
flat
washers.
Be
sure
no
wires
are
pinched
be-
tween
the
cavity
and
the
chassis.
Refer
to
Pictorial
8
(Illustration
Booklet,
Page
6)
and
o
8B
for
the
following
steps.
)
Slide
the
three
plastic
spacers
on
the
RF
driver
element.
Be
sure
the
two
small
holes
in
each
spacer
are
positioned
correctly.
Position
the
_
spacers
approximately
as
shown.
/
(
y
Insert
the
two
RF
pickup
elements
through
the
plastic
spacers
as
shown.
Then
position
this
assembly
in
the
coaxial
cavity.
(
(V)
Refer
to
the
inset
drawing
of
Detail
8B
and
sol-
_
der
the
RF
driver
element
to
coaxial
socket
X
/
(S-1)
and
standoff
U
(S-1).
(
/
)
Refer
to
the
inset
drawing
on
Pictorial
8
and
cut
the
flexible
lead
at
lug
10
of
relay
L.
Cut
it
as
close
to
the
lug
as
possible.
()
Carefully
remove
the
sleeving
from
this
lead.
Then
cut
the
lead
to
1-1/4”
and
the
sleeving
to
1”
in
length.
Replace
the
sleeving
on
the
lead.