Heathkit HD-1250 Manual page 21

Page 19
Turn
the oscillator circuit
board
foil-side-up
and position
it
as
shown.
Apply
a
thin layer of solder to the
two
corners
of
the
circuit
board
as
shown.
( )
Cut two
1"
lengths of wire
braid.
Apply
a
small
amount
of solder
to
both ends
of
both
braid lengths.
( )
Position
one
1"
length of braid
1/8"
onto corner
A
of the circuit board.
Heat the
foil
and
the braid until
the
solder melts.
Remove
the heat
from
the
connection.
NOTE: Hold
the
braid with pliers
to avoid burning
(
)
In
the
same
manner,
mount
and
position the other
1"
wire
braid at
corner
B on
the board.
Be
sure
you do
not
make
a
solder bridge to
other
foils.
THIN
SOLDER
1"
BRAID
PICTORIAL
2-3
CONTINUE
<3>
CIRCUIT
BOARD CHECKOUT
Carefully inspect the circuit
board
for the
ollowing conditions:
)
Unsoldered connections
)
"Cold"
solder
connections.
)
Solder bridges between
foil patterns.
)
Protruding leads
which could touch
together.
)
Transistor for the
proper type and
installation.
FINISH
Set
the
circuit
board aside temporarily.
1
1/8
3/B
I
3/8
7/8
I . | I
'l
'
'
I
I
0 6
1
(CM)
2
3*5
-f '
1
6 7 8 9 10
11
I
12 13 14 15 16
17