A semi-fixed ceramic capacitor for a radio receiver has a rotor (11) made of metallic material and defining two or more identical electrodes (11a), a ceramic member (2) carrying two or more identical stator electrodes (17) and a housing (13) of electrically insulating material housing the rotor and stator electrodes (11a, 11a, 17, 17). The body of the ceramic member lies between the stator and rotor electrodes. A shaft 6 which is earthed carries, and is electrically connected to, the rotor (11) and seperate terminals (4) are connected to respective ones of the stator electrodes. 展开▼
