icom class b ais transponder.Multiple potentiometer sensor selection criteria

　　The speed regulating multi-link potentiometer we use now is wire wound multiple (10 turns) resistance wire type, good multi-link potentiometer wire wrapped tightly and evenly, when listening to the ear, the rotating sound is very light, and even difficult to hear the sound; The inferior multi-link potentiometer can hear the obvious "squeak" sound, and it can be clearly judged from the sound that the winding is not uniform.

　　Multiple potentiometers for voltage regulation, operating point regulation of amplifier circuit, sub-brightness regulation and line and field scanning signal regulation in various power supply circuits should use linear multiple potentiometers.

　　The multi-potentiometer for tone control in audio equipment should use the reverse logarithmic type (formerly called exponential type) multi-potentiometer, and the logarithmic multi-potentiometer for volume control can be used.

　　What is the difference between a sliding rheostat and a variable-value resistor and a fixed-value resistor

　　When choosing a multi-potentiometer, the resistance material, structure, type, specification and adjustment mode of the multi-potentiometer should be selected according to the specific requirements of the standard application circuit.

　　For example, power type wire-wound multiple potentiometers are used for high-power circuits; In the circuit of precision instrument, high-precision wire-wound multi-potentiometer, precision multi-turn multi-potentiometer or metal-glass glaze multi-potentiometer should be selected; Medium and high frequency circuit can choose carbon film multi-coupling potentiometer; Semiconductor radio optional standard volume adjustment and power switch can choose a small carbon film multiplex potentiometer with rotary switch; The volume control of stereo audio amplifier can choose double coaxial multi-link potentiometer; The tone control of the sound system can choose the direct slide multi-potentiometer; The reference voltage regulation of the power supply circuit should choose the fine-tuning multi-potentiometer; Multi-turn potentiometers or single-turn multi-turn potentiometers can be selected for multi-turn potentiometers used in communication equipment and computers.

　　Sliding rheostat: by changing the number of turns of the resistance of the access circuit to change the resistance of the access circuit, the resistance value of the access resistance can be continuously changed (to be precise, the resistance of the resistance line of one turn is changed as the minimum change unit), and the resistance value of the access circuit cannot be read from the rheostat.

　　Variable value rheostat: also known as resistance box, by changing the fixed resistance number of the access to the optional standard circuit to change the resistance of the access circuit, can not continuously change the resistance value of the access circuit, you can read the resistance value of the access circuit from the scale on the surface of the resistance box.

　　Fixed resistor: A resistor with a fixed resistance value, the general resistance value does not change after connecting to the circuit.

　　Good quality multiplex potentiometers because of tight wire winding

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