The BFC capacitors are of the butterfly type permitting operation as a series capacitor without a rotor connection or as a split stator capacitor with provision for grounding the rotor independently from the capacitor mounting studs, which are insulated from the rotor in the silicone treated steatite base.
As the table indicates, the minimum capacitance in both the series and split stator modes of connection is very low. This is particularly desirable in VHF and UHF applications. With exception of the silver plated phosphor bronze rotor wiper, the rotor and stator assemblies are made of brass, which is nickel plated after rotor and stator assembly soldering operations.
The BFC capacitors have a straight line capacitance characteristic through their rotational range of 0 to 90 degrees. The nominal air gap is 0.030″. The breakdown test voltage is 1690 volts peak, 60 hertz.