The LF automatic direction finder is an airborne radio compass system designed to automatically provide a visual indication from which an incoming Radio Frequency (RF) signal is received. It provides for the aural reception of amplitudemodulated signals in the 190 to 1750 KHz range in three bands, 190 to 400 KHz, 400 to 840 KHz, and 840 to 1750 KHz.

The dynaverter furnishes DC power to the radio set and is powered from the primary bus through the No.2 radio bus. The circuit is protected by a circuit-breaker marked “ADF” on the radio circuitbreaker panel.

The equipment includes a receiver, a loop antenna, a sense antenna, a control panel and a dynaverter utilizing the RMI or BDHI (ARN/TAC) for bearing information.