Tektronix Type 130, Instruction Manual

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Maintenance — Type 130
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4-3
In soldering to metal terminals (for example, pins on a
tube socket) a slightly different technique should be em-
ployed Prepare the iron as outlined above , but tin with
ordinary tin-lead solder. Apply the iron to the part to be
soldered as shown in Fig. 4-4. Use only enough heat to allow
the solder to flow freely along the wire so that a slight fillet
will be formed as shown in Fig. 4-3.
General Soldering Considerations
When replacing wires in terminal slots clip the ends neatly
as close to the solder joint as possible. In clipping the ends
of 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 to use some form of “heat sink”
Fig. 4-4. Soldering to metal terminals.
Fig. 4-5. Wooden dowel.
to avoid melting the plastic. A pair of log-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 #4-40 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 #4-40 nut onto each mounting bolt, positioning the bolt
so that the distance between the bottom of the bolt and the
Fig. 4-6. Long-
nosed pliers as “heat sink”.
Fig. 4-7. Ceramic strips and fittings.