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Simpson 1000 - Page 46

Simpson 1000
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SPECIAL
APPLICATIONS
of
the
filament
to
ground
(toggle
switch
position
O),
the
center
tap
to
an
open
circuit
(toggle
switch
po-
sition
5),
and
the
other
end
of
the
filament
to
the
filament
voltage
source
(toggle
switch
position
1).
NOTE
For
tubes
which
have
special
double-ended
connec-
tions
for
any
elements,
connect
only
one
of
the
pin
circuits
to
the
voltage
source,
and
connect
the
other
pin
circuit
to
an
open
circuit
(toggle
switch
position
DI:
3.
4.
Consult
the
tube
characteristic
data
and
set
the
K
toggle
switch
at
a
position
which
furnishes
the
maxi-
mum
plate
and
screen
voltages
within
the
tube
rat-
ings.
The
K
toggle
will
furnish
these
operating
volt-
ages;
in
the
0
and
1
positions,
the
plate
is
180
volts
and
the
screen
is
90
volts;
in
the
2
position,
the
plate
is
90
volts
and
the
screen
is
45
volts;
and
in
the
3
position,
the
plate
is
45
volts
and
the
screen
is
15
volts.
If
the
highest
voltages
are
to
be
used
(180
for
plate
and
90
for
screen),
choose
position
1
tempor-
arily,
rather
than
position
0.
If
this
needs
to
be
in
position
0,
it
will
be
shown
when
you
perform
step
9.
Set
the
BIAS
control
at
7,
the
RANGE
control
at
about
50,
and
the
L
toggle
at
0.
.
Insert
the
tube
in
the
socket
and
allow
it
to
warm
up.
Then
apply
the
short
tests.
Consult
the
base
diagram
of
the
tube
and
select
the
base
pin
numbers
which
correspond
to
alternate
elements,
beginning
with
the

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