EMR Corporation was founded in 1980 by William Lieske, Sr. as an OEM supplier of ferrite and hybrid devices to the land mobile communications and broadcast industries. Soon after founding EMR Bill expanded his scope of activities to include the design and manufacturing of ferrite and cavity resonant devices and complex combinations of R.F. filtering products, such as antenna duplexers, hybrid and cavity resonant combining networks and receiver multicoupling. EMR offers a complete line of antenna site and mobile filtering products covering the R.F. spectrum from 30 MHz to 2.8 GHz, and products capable of handling power levels up to 2 KW. Our line is extensive, we have many products to provide effective communications in today's challenging R.F. environments.