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Projection
Lamps.
The
pradovit-f
takes
projection
lamps
of 300
and
500
watt
with
prefocus
G
17
q pin
type
cap.
In connectian
with
the
500 watt
lamp
a
2nd heat absorbing
filter
as
well
as
the
guide
disk
for
the
lamp
housing
code
number
37915 C
is
essential.
The 2nd heat
absorbing
filter
is fitted
in the
upper
longitudinal
cutouts
of
the
condensor-
mount
and
tightened
down
with
the
milled
screws.
The
guide
disk is fitted
into
the
lamp
housing
immediately
in
front
of
the
reflector.
This
guide
disk
regulates
the
ventilation
of
the
lamp
and
has no
influence,
whatsoever,
on
the
light
intensity.
Projection
lamps
are
available
rated
at 10
volt
intervals
above
and
below
the
normal
supply
voltage.
If your
AC
supply
carries
an
over-
voltage,
then
you should
choose,
for instance,
a 230 volt lamp
in
place
of
the
220-volt
one,
or
in
extreme
cases
even
a lamp
for
240
volts.
Before
fitting
a
new
lamp,
check
that
the
voltage
marked
on it corresponds
to
the
ac-
tual
mains
voltage.
For
instance,
a
11O-volt
lamp
must
not
be
connected
to a 125-volt
-
worse
still
-
a 220 volt
supply,
otherwise
it
will
burn
out
immediately.
Projection
lamps
are
also very
sensitive
to knocks
or appreci-
able
tilting
during
burning.
The manufactur-
ers
can
easily
establish
whether
premature
lamp
failure
is due to any
of
these
causes;
claims
for
replacement
are therefore
useless
in such cases.
17
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