Woven mesh tube is one of the basic semiconductor components, with current amplification, the core component of electronic circuits. There are many types of domestic crystal woven mesh tube, the arrangement of the pins is not the same, the use of the woven mesh tube is not sure of the arrangement of the pins, it is necessary to measure to determine the correct location of each pin, or find the transistor manual to clarify the characteristics of the woven mesh tube and the corresponding technical parameters and information. The woven mesh tube is made of tough and environmentally friendly PET monofilament, which has strong stretchability, abrasion resistance, flame retardancy and elasticity.

  Reverse characteristic test, the multimeter red pen touches the positive pole of the woven mesh tube, the black pen touches the negative pole of the woven mesh tube, if the meter needle points to infinity or near infinity, the tube is qualified. Positive characteristics test, the multimeter's black pen (the positive side of the table) to touch the positive side of the woven mesh tube, the red pen (the negative side of the table) to touch the negative side of the woven mesh tube. If the meter does not swing to 0 value but stop in the middle of the scale, then the resistance is the positive resistance of the woven mesh tube, generally the smaller the positive resistance the better. If the forward resistance is 0 value, it means that the tube core is short-circuited and damaged, and if the forward resistance is close to infinity value, it means that the tube core is broken. Short-circuit and disconnected tubes can not be used.

  Switching components, woven mesh tube in the forward voltage under the action of resistance is very small, in a state of conduction, equivalent to a switch on; reverse voltage, resistance is very large, in a cut-off state, as a disconnected switch. Using the switching characteristics of the woven mesh tube, you can form a variety of logic circuits. Detector woven mesh tube, the radio plays the role of wave detection. Variable capacitance woven mesh tube, used in the high frequency head of the TV. Limiting element, the forward voltage drop of the woven mesh tube remains basically unchanged after forward conduction (0.7V for silicon tube and 0.3V for germanium tube). Relay woven mesh tube, switching power supply inductors and relays and other inductive loads play a relaying role.

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