Tektronix TYPE CA Instruction Manual page 15

Fig. 4-4. oldering t o a terminal. Note the slight fillet of solder--
exaggerated for clarity--formed around the wire.
General Soldering Considerations
When replacing wires in terminal slots clip
the ends neatly as close to the solder joint as
possible. In clipping ends or wires take care
the end removed does not fly across the room
as it is clipped.
Occasionally you will wish to hold a bare
wire in place as it is being soldered. A
handy device for this purpose is a short
length of wooden dowel, with one end shaped
as shown in Fig. 4-5. In soldering to terminal
pins mounted in plastic rods it is necessary
Fig. 4-5. A soldering aid constructed from a 1/4 inch wooden dowel.
to use some form of " heat sink" to avoid
melting the plastic. A pair of long-nosed pliers
(see Fig. 4-6) makes a convenient tool for this
purpose.
Ceramic Strips
Two distinct types of ceramic strips have
been used in Tektronix instruments. The earlier
type mounted on the chassis by means of
AA
#2-56 bolts and nuts. The later type is mounted
with snap-in plastic fittings. Both styles are
shown in Fig. 4-7.
To replace ceramic strips which bolt to the
chassis, screw a #2-56 nut onto each mounting
bolt, positioning the nut so that the distance
between the bottom of the nut and the bottom
of the ceramic strip equals the height at
which you wish to mount the strip above the
chassis.
drop of red glyptal. Insert the bolts through
the holes in the chassis where the original
SOLDER NG RON
LONG NOSED
PL ERS
Fig. 4-6. oldering
of the long-nosed pliers between
the heat.
strip was mounted, placing a #2 starwasher
between each nut and the chassis. Place a
second set of #2 flatwashers on the protruding
Fig. 4-7. Two types of ceramic strip mountings.
Maintenance - Type CA
ecure the nuts to the bolts with a
PLAST C CO L FORM
to a terminal mounted in plastic. Note the
the iron and the coil form to absorb
use
4-3