( 2 ) Insert the leads or pins in the corres-
ponding
contacts
of
socket
X110.
If
the leads are long enough, set the
POWER
switch
to
the
OFF
position,
grasp each lead about one-eighth inch
from its end with the tips of a pair of
long-nosed pliers, and insert the leads
into
the
proper
socket
contacts.
Set
the POWER switch to the ON posi-
tion and test the tube.
b. Subminiature tubes of the flat or in-line-
contact type with pins or leads are tested in
flat
socket
X109
9).
The
tube
pins
or
leads must be inserted so that the dot on the
base
of
the
tube
is
directly
in
line
with
the
TM6625-274-12-9
small, molded dot on the socket.
c. S u b m i n i a t u r e t u b e t y p e s a r e i d e n t i f i e d i n
the test data book by a star beside the type
tubes (letters, A, B, C, D, E, and F identify
number. The applicable basing for the various
basing for use with test data book).
round types is indicated in the N o t a t i o n s c o l -
umn. The basing designation letter refers to
b. R e m o v e
the
tube
under
test
from
the
test socket.
c. Place
the
adapters,
if
used,
under
the
clamps on the inside of the cover.
d. Disconnect
the
ac
line
cord
from
the
power
source
and
wind
it
counterclockwise
around
the
retainer
bracket
on
the
inside
of
the cover. Secure the plug under the storage
TM6625-274-12-8
clip (TV-7B/U and TV-7D/U, fig. 3 and 4),
or under the coiled ac line cord (TV-7/U and
TV7A/U).
and X110 (circular).
e. Place the test leads, if used, in the stor-
age
clips
(not
on
TV-7/U).
On
the
TV-7/U,
store the test leads under the coiled ac line
a. S e t
the
POWER
switch
to the OFF po-
sition.
f. C l o s e t h e c o v e r a n d s e c u r e t h e f a s t e n e r s .
Section
V.
OPERATION
UNDER
UNUSUAL
CONDITIONS
General
Operation
at
Low
Temperatures
Subzero
temperatures
and
climatic
condi-
The test set is designed for normal operation
tions associated with cold weather may effect
through
a
temperature
range
from
-40F
to
the efficient operation of the test set.
+ 125F. The operation of the equipment may
be more difficult in regions where extreme cold,
a. E x t r e m e c o l d m a k e s t h e a c l i n e c o r d a n d
heat, humidity, or moisture conditions prevail.
other
rubber
parts
stiff
and
brittle.
Handle
the equipment carefully to avoid cracking the
information that may be used to minimize the
insulation on the ac line cord and on the test
effects
of
regional
extremes.
leads.