Thin-film trimmer capacitors use organic plastic film as the medium, that is, add organic plastic film between the moving piece and the stator (both moving and stationary are semi-circular metal pieces), and adjust the screws on the moving piece to make the moving piece rotate. The capacity can be changed. Film trimmer capacitors are generally divided into double trimmers and quadruple trimmers. Some sealed double-connected or sealed four-connected variable capacitors have their own film trimmer capacitors, and the trimmer capacitors are installed on the top of the casing, which is more convenient to use and adjust.
Advantages Small size, light weight, can be adjusted repeatedly, easy to use.
Uses Used in transistor radios, electronic instruments, and electronic equipment.