Heathkit HD-1250 - Page 20

Page 18
NOTE: In the following
steps, line up the
locating
tab
on the transistor
with the
locating
tab
of the outline on
the circuit
board and insert
the leads into the correct
holes
as
shown.
Solder the transistor leads
to the foil and cut off
the
excess lead
lengths. NOTE: The
1/8"
transistor height
above the circuit board is critical.
LOCATI MG
TAB
( )
Q11. MRF502 transistor
(#417-290)
NOTE: Check to be sure no part of
transistor
Q11
is
touching th
resistor-capacitor assembly.
CONTINUED
NOTE:
Before
you install
the following
disc
capacitor,
use
long-nose
pliers to
remove
the
excess insulation
from
the
capacitor leads.
( )
C13.
5pFdisc.
( )
C14.
.01
nF (103) ceramic.
Save
both cutoff
capacitor
leads for
use
later.
( )
Solder
the leads
to the foil and
cut off
the excess
lead lengths.
NOTE:
To prepare
a wire,
as in
the
following
step, first
cut it
to the indicated
length
and
then remove
1/4"
of insulation
from
each end. Tightly
twist
each wire
end
and apply
a small amount
of solder
to hold
the
small strands
together.
( )
Prepare
a
5"
blue wire.
(
)
5"
blue
wire
at C. Solder
the wire
to
the foil and
cut off
the excess
wire
length. The free
end
will be connected
later.