Step-By-Step Assembly - Heathkit HW-9 User Manual

Page
31
Heathkit
STEP-BY-STEP
ASSEMBLY
(
)
Refer
to
Pictorial
2-1 (Illustration
Booklet,
Page
8)
for
the following
steps.
(
)
Position the
T/R
circuit
board
as
shown
in the
Pictorial.
NOTE: Due
to
the density of this circuit
board,
You
will first
install
the
taped
components
that
mount
horizontally
on
the
circuit
board.
When
you have
these installed,
you
will
install
the
taped
compo-
nents
that
mount
vertically.
Install
a
component
in
Section
1
of the circuit
board
as
follows:
(
)
D406:
1N4149
diode (#56-56).
Be
sure to posi-
tion the
banded end
as
shown on
the
circuit
board.
(
)
Solder the
leads to
the
foil
and
cut
off
the
ex-
cess lead lengths.
Install
components
in
Section 2
of
the
circuit
board
as
follows:
(
)
C446:
.1
(104) glass
ceramic
capacitor.
( )
D405:1N4753A
diode
(#56-55).
(
)
C424:
.01 \lF
(103) glass
ceramic
capacitor.
( )
D401:1N4149
diode (#56-56).
(
)
Solder
the leads to
the
foil
and
cut off
the ex-
cess lead lengths.
Install
components
in
Section 3 of the circuit
board
as follows:
(
)
R3
34
:
1
000
ft
(brn-blk-red) resistor.
(
)
R428: 680
ft
(blu-gry-brn) resistor.
(
)
R429:
1500
ft
(brn-grn-red)
resistor.
(
)
R418:
2.7
ft
(red-viol-gold) resistor.
ns
as
C432:
.01 jxF (103) glass
ceramic capacitor.
C426:
.01 \lF
(103) glass
ceramic
capacitor.
R414: 1000
ft
(brn-blk-red) resistor.
C433:
.01 jxF
(103) glass
ceramic
capacitor.
C579:
.01 \lF (103) glass
ceramic
capacitor.
Solder the leads
to
the
foil
and
cut
off
the
ex-
cess lead lengths.
all
components
in
Section 4
of
the
circuit
board
ollows:
R332: 680
ft
(blu-gry-brn)
resistor.
R331:
4700
ft
(yel-viol-red) resistor.
D408:
1N4149
diode (#56-56).
R412:
4700
ft
(yel-viol-red) resistor.
D303:
1N4149
diode
(#56-56).
Solder
the leads to the
foil
and
cut
off
the ex-
cess lead lengths.
Install
components
in
Section
5 of the circuit
board
as follows:
R357: 680
kft (blu-gry-yel) resistor.
R313: 33
kft (org-org-org) resistor.
R346: 100
ft
(brn-blk-brn)
resistor.
R438:
4700
ft
(yel-viol-red) resistor.
R437:
4700
ft
(yel-viol-red) resistor.
R433:
4700
ft (yel-viol-red) resistor.
Solder
the leads
to
the
foil
and
cut
off
the ex-
cess lead lengths.