Profile: Johanson Mfg. Corp. is a manufactures trimmer capacitors for RF and microwave industries. We are an ISO 9001:2000 certified company. Our product line includes high power attenuators, high power Terminations & resistors, caseless couplers, and variable inductors. We also provide Cera Trim®, Single Turn®, Thin Trim®, Seal Trim® capacitors. Our caseless couplers are equipped with dual directional & bi-directional lines of coupler components with superior insertion loss and VSWR at frequency ranges from 30 MHz - 8 Ghz with power handling from 50W - 1000W. They are available in 2 different PCB mounting styles, tab version and surface mount version. JMC also has the capabilities to design and manufacture customized couplers to meet your unique electrical or mechanical specifications for both commercial and military applications. Our Thin-Trim® trimmer capacitors are ideal for applications where size and performance are most critical. These single-turn capacitors exhibit remarkable electrical characteristics for their small size and useful up to 2 GHz. These trimmers are used for low-profile applications.