Technical characteristics:

1. An adjustable power resistor is characterized in that it comprises a first fixed piece, a second fixed piece, a movable piece, a circular bracket, a first rotating movable piece and a second rotating movable piece. The two ends of the circular bracket are connected with the first fixed piece and the second fixed piece respectively. One end of the first rotating movable piece and the second rotating movable piece are articulated with one end of the movable piece through an articulated shaft, and one end of the circular bracket is articulated A carbon film is arranged on the surface, and a circular rod is arranged on the other end of the circular support. The circular rod is surrounded by several resistance wires, and the end face of the resistance wire is provided with a contact line surface.

2. An adjustable power resistor described in Fig. 1 is characterized in that the other end of the first rotating moving piece is contacted with a carbon film body.

3. An adjustable power resistor described in Fig. 4 is characterized in that the other end of the second rotating movable piece is contacted and connected with the contact line surface.

4. An adjustable power resistor described in Fig. 4 is characterized in that the two ends of the carbon film are also connected with the first and the second fixed pieces respectively.

5. An adjustable power resistor described in Fig. 1 is characterized in that two ends of the resistance wire are connected with the first piece and the second piece respectively.

6. An adjustable power resistor described in Fig. 1 is characterized in that one end of the articulated shaft is provided with a first adjusting knob and the other end of the articulated shaft is provided with a second adjusting knob.

7. The utility model relates to an adjustable power resistor, which is characterized in that the circular support is made of ceramic material.