Product Announcement from Oren Elliott Products, Inc.
The APL is used as a tuning capacitor in a variety of RF test equipment and ham radio gear. The APL's combination of low price, high maximum voltage, fairly large capacitances, and low-leakage L4-grade ceramic have made it a popular configuration.
The APL is usually installed by single-hole mounting, but mounting posts are available, as are lock bearings and a 180° rotor stop. Most APLs have solder lugs for electrical connection to the stator, and most have an insulated shaft.
A variation on the standard APL configuration is the APL-DE, a "double-ended" APL. The rear ceramic adds strength and rigidity, and is necessary on extremely long APLs with close spacing, like the popular 32APL208DE (.032" air gap, 208pF maximum capacitance). Oren Elliott Products currently offers five standard air gaps, whose corresponding maximum voltages range from 600V to 1500V.