Retrieved November 19, 2017.CS1 maint: Archived copy as title (link) ↑ Long & Long (1999, p. 116) stating, "However, the frequencies of the Bendix receiver's bands 4 and 5 were completely out of the design range of the direction-finder, and the loop could not process the signals to obtain bearings." ↑ Long & Long (1999, p. 116) states, "Earhart though she could take a radio bearing with her direction-finder loop on any signal between 200 and 10,000 kilocycles.