Ten-Tec 4229 - Variable Inductor Assembly; Inductor Preparation and Component Mounting; Coil Assembly and Lubrication

Z
Wy
(
)
7.
The
assembly
is
now
completed.
Adjustment
follows.
V. Mechanical Adjustments.
(
)
1.
With
the
nuts
holding
the
stator
assembly
in
the
insulators
loosened
(
(
(
)
slightly
and
the
four
screws
in
the
spacer
rods
slightly
loosened,
place
the
capacitor
on
the
flat
smooth
hard
surface
with
the
mount-
ing
feet
down.
Hold
down
to
the
surface
and
tighten
the
four
screws
in
the
two
spacer
rods.
2.
With
the
capacitor
still
in
the
same
position,
check
the
parallel
re-
lationship
of
the
front
and
rear
plates.
The
distance
between
the
plates
should
be
equal
at
the
bottom
on
each
side.
CAUTION:
Be
sure
that
the
rear
set
screw
and
ball
adjustment
is
such
that
the
rear
plate
can
be
moved
to
the
front
or
rear
without
causing
too
much
tension
on
the
insulators
or
loose
enough
to
cause
the
ball
bearing
to
escape
from
the
rotor
shaft.
When
the
front
and
rear
plates
are
positioned
properly
the
nuts
on
the
inside
and
outside
of
the
rear
insulator
can
be
tighten-
ed.
Be
careful
not
to
overtighten
so
as
to
damage
the
ceramic
insula-
tors.
3.
Now
adjust
the
set
screw
in
the
rear
plate
so
that
the
rotor
assembly
tension
is
sufficient
to
hold
the
assembly
in
any
position
of
its
ro-
tation.
4.
Positioning
of
the
stator
plates
in
relation
to
the
rotor
plates
is
ac-
complished
by
adjusting
the nuts
on
each
end
and
each
side
of
the
stator
assembly.
The
goal
in
this
adjustment
is
to
center
the
stator
plates
between
the
rotor
plates.
With
the rotor
fully
meshed
with
the
stators,
adjust
the position
of
the
stator
plates
by
moving
the
front
and
rear
nuts
on
both sides
until
the proper
spacing
is
attained.
Lock
in
this
position
by
tightening
the
nuts.
5. This completes the assembly of the variable capacitor.
VARIABLE INDUCTOR ASSEMBLY #81040
REFER TO FIGURE 5.
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ae
Inspect the front and rear plates to assure that all holes are free of any
obstructions - excessive solder, etc. Remove any obstructions with a knife
Peapbteear godt. il? bit.
Attach the tension springs to the front and rear plates with 5/16" long 6-32
machine screws threaded into the flat end of.each spring. These screws enter
from the outside of each plate so that the springs are on the inside of the
final assembly. The holes for these screws are the ones toward the center of
the boards 3/8" from another hole along the upper edge of the plates. When
the springs have been secured on their screws, bend each spring at a sharp
angle toward the center of the board and flat against the board.
Attach a tension arm to each of the tension springs by hooking the loop
through the small holes in the arms. A pair of needle nose pliers will fa-
cilitate this operation. Bend the spring loop to secure the spring to the arm
Install the two square-end spacer rods to the front plate with 3/8" 6-32
machine screws. The lower spacer is mounted through the vacant hole in the
mounting plate on the front plate. The upper spacer is mounted directly
above through the plate and adjacent to the tension spring mounting screw.
The tension arm spacer rod is now attached to the front plate with 3/8" 6-32
screw through the center hole along the left edge of the front plate through
the single hole at one end of the tension arm. When the screw is tightened,
the tension arm should be free to move on the spacer rod.
Apply a hosehold lubricant lightly inside the center bearing hole in both end
plates-- petroleum jelly or similar.