Discontinued, ARCO VARIABLE COMPRESSION TRIMMER CAPACITOR, 140PF TO 580PF, 175 VDCW

This variable compression mica trimming capacitor is produced by stacking mica dielectric capacitance units. A capacitor section consists of a thin film of mica between two spring loaded nonferrous metal conducting plates; the stacked units are mounted within a ceramic container, or on a ceramic base. By alternating metal plate, mica film, metal plate. etc., and paralleling these units, any desired capacitance with the physical limitations of the ceramic base can be achieved. A panhead adjusting screw thread is inserted through the center holes of the plates, the mic films, and the threaded bushing, for typ. The soldering lugs may be bent in any position with out affecting the capacitance setting.