Oscillator Circuit Board - Heathkit HD-1250 Manual

OSCILLATOR
CIRCUIT
BOARD
Position the
oscillator
circuit
board
as
shown. Then proceed with the following
steps.
( )
Cut one
lead
of
a
47 pF
mica capacitor
to
1/4"
and cut the other lead
to 3/4".
Bend
the longer lead straight
out, and
the short
lead
toward
the side
as
shown.
>
1/4'
( )
In
the
same
manner, prepare another
47 pF
mica
capacitor.
Bend
the short
lead
in
the opposite direction to the
one
in
the previous
step.
NOTE:
In the following steps,
push the
short capacitor lead into the circuit
board
hole. Position each
mica
capacitor
flat
on
the circuit
board
as
shown. Then,
solder
each capacitor to the
foil
as
you
mount
it
and
cut off
the excess lead length.
(
)
C12.47 pF
mica.
C1
1 .
47
pF
mica.
SPONGE OR
CLOTH.
Page 17
CONTINUED
( )
R11.
470012
(yellow-violet-red).
( )
R
13.
100
kJ2
(brown-black-yellow).
(
)
R16. 27
kJ2 (red-violet-orange).
(
)
Remove
the excess coating
from
the
leads of a .001
pF
disc capacitor.
Then wrap
the leads of the capacitor
around
the leads of a
27
J2
(red-
violet-black) resistor as
shown.
Solder the leads as
shown and cut
off the excess resistor leads.
(
)
R12-C15.
Mount
the
prepared
resistor-capacitor
assembly.
( )
R14. 1500
Q.
(brown-green-red).
( )
R15. 10
kSl (brown-black-orange).
(
)
Solder the
leads to the
foil
and cut
off
the excess lead lengths.