
(SEE TEXT)
f ( vz
STEEL
PIN
PLUNGER
5/32" DIA
FLATTEN -
DRILL
d
TAP
FOR 6 -32
THREAD
6 -32 SCREW
Fig.
5. For proper
solenoid
operation, plunger
must be
modified as
shown
at
right.
I/4"DIAtiO
DRILL
AND
TAP FOR
TRIPOD
SCREW
Fig. 6.
Lengths
of L bracket
legs must
be calculat-
ed for your
particular
camera;
do not
omit slots.
the flashlight.
Then
replace
the original
lamp
with
a 6 -volt lamp
of
similar
size,
shape,
and basing.
Drill
a hole
through
the end of
the flashlight
body,
and place
a rubber grommet
in it.
Now,
insert
one
end of
a
length
of zip
cord
through
the grommet
and connect
one
conductor
to
the base contact
and the
other
conductor
to the thread
contact
of
the lamp.
As for
the filter
cell assembly, you
can
use a cardboard
tube
that
fits
snugly
over the front
of the flashlight
as shown.
The lens filter
itself
can then be glued
to
the
tube.
78
How
To
Use. For the initial
tryout,
set
up the camera, flash
attachment,
and
Electronic
Shutter Control in
a
semi -
darkened
room. Place
Si and
S2
in
the
OFF positions,
and connect
a
heavy
-duty
6 -volt battery -such
as a
motorcycle
or
an
automobile
battery- through
J1 and
J2.
Next,
connect
control
light 11
via J5
and J6
and shutter
solenoid
L1
via J3
and J4. Finally,
short
-circuit J7 to J8.
Set S2 to the
ON position (if 12
comes
on,
manually reset
K4
until
it
extin-
guishes) . Place
the
control
light
with the
filter in place
about
4'
away from
PC1,
directing
the beam onto the photocell.
Meter M1
should now
indicate maximum
current
flow.
Now,
without disturbing
R1
from its zero -resistance
setting,
ad-
just
the
armature of K1 until
the con-
tacts
just close.
Then
slowly rotate
the
shaft of R1 until the contacts just
open,
and
observe
and
record
the
milliammeter
reading
at this
point.
Reset
R1
to
zero
resistance.
The minimum meter
reading
will be helpful in
determining the maxi-
mum separation
between
IZ
and PC1
in
future
setups.
Should
it
be
desired to
separate the
control light and photocell
by
more
than
about 6',
it is
suggested that you remove
the short -circuiting
jumper
from across
J7 and J8 and
connect one or two
1.5-
volt D cells
in its
place.
With the control
light
directed into
the
light
shield, turn S1 on and cover
the
front of
the shield with
your hand.
This
interrupts the beam, and
if
all systems
are go, the shutter solenoid should
ac-
tuate immediately, and
about
a second
later
12
should turn on.
To
reset
the control
system,
first
set
S1
to
OFF and then depress the
arma-
ture
lever to
K4
to
extinguish
12.
Now
close Si,
and the system
is
set for
an-
other
photograph.
30
Fig. 7. Modified flashlight
with filter
assembly
fitted to lens serves as
housing
for I1. Zip cord terminates in plugs
that
match J5
and
J6 on
main
relay chassis.
FILTER
CELL
GROMMET
(HIDDEN)
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