Allen Avionics has developed a family of wide bandwidth ground loop hum eliminators. These products will satisfy the broadcast industry's need for wide bandwidth components for use in high definition video applications, high speed video switching systems, high resolution or high definition video display and projection systems and for all wide bandwidth analog and digital transmission applications. These hum eliminators provide a high degree of common mode rejection at power frequencies (50Hz, 60Hz and 400Hz) while passing all frequencies from DC to over 300 MHz for the GLE-75.