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Topic: heat-shrink tubing: If you strip the insulation from a wire, and then solder the end, and the wire can move, such as being within a car, the wire will only move at its weakest point. This is the tiny section of wire which has been striped of insulation. Therefor, when soldering a wire, slip a short piece (read one-half inch) of heat-shink tubing over the wire and down over the terminal. You can shrink the tubing with your iron. In industry, the tubing is shrunk by a heat gun (read:blow-dryer). The tubing is sold by as supplied inside diameter. It comes in many chemistries. For our work, the cheapest chemistry is best. That's usually Polyolifin.The most typical diameter is 1/8 inch. You can solder two wires together "in mid air" by sleeving the joint.
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