ATM, APC, and APL configurations

The ATM is our smallest, least expensive variable capacitor. It can be used to replace screw-type air dielectric and mica dielectric capacitors The APC is the most durable air trimmer. It is frequently equipped with a lock-bearing and is used as a factory-adjustable trimmer capacitor, but can also be used as an operator-controlled tuning capacitor. 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 voltages, fairly large capacitances, and low-loss L-4 grade ceramic have made it a popular configuration.