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Simpson 1000 - Page 47

Simpson 1000
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SPECIAL
APPLICATIONS
cathode
it
is
indirectly
heated,
or
with
the
next
ele-
ment
if
the
tube
has
a
filamentary
type
cathode.
Translate
these
base
pin
numbers
into
push
switch
designations
to
determine
which
switches
to
press
for
the
short
tests.
For
instance,
if
an
element
to
be
checked
is
connected
to
the
#4
base
pin,
press
push
button
D
for
the
short
test
for
that
element.
.
If
the
tube
has
a
satisfactory
leakage
resistance
be-
tween
each
adjacent
pair
of
elements,
proceed
with
the
tube
test.
Otherwise,
do
not
proceed
with
the
test
on
the
faulty
tube,
or
the
tube
tester
may
be
damaged.
.
Consult
the
base
diagram
for
the
tube
to
select
the
base
pin
number
for
its
plate.
Translate
this
into
a
push
switch
and
toggle
designation.
The
push
switch
is
the
one
which
you
will
list
for
the
VALUE
column.
Press
this
push
button.
The
toggle
should
be
the
one
which
you
had
set
to
position
3
in
step
2
above.
Change
the
toggle
setting
to
5
and
remove
the
tube
tester
from
its
case
for
the
next
step.
.
Connect
a
DC
current
meter
from
the
#5
terminal
of
the
plate
toggle
switch
to
the
#3
terminal
of
the
same
toggle
switch.
See
Figure
5
for
an
indication
of
the
location
for
these
meter
lead
connections.
The
#5
ter-
minal
of
the
toggle
switch
is
the
one
nearest
the
bot-
tom
of
the
panel.
Connect
the
negative
meter
lead
to
this
terminal.
The
second
terminal
above
that
is
the
43
terminal
to
which
you
will
connect
the
positive
meter
lead.
Use
a
cur-
rent
meter
such
as
you
can
obtain
with
the
circuits
of
45

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