Designed to be used with an existing FM receiver or transceiver, this unit would give a bearing of a transmission to within 5 degrees. See also the DF2 information page.

NEW Circuit diagrams added 28th December 2007.

• Download brochure PDF (178kb). Thanks to RadioBoffin.
  
• Download operating instructions PDF (780kb). Thanks to Roj on uk.radio.amateur.
• Download circuit diagrams (2.1Mb). Many thanks to the contributor who wishes to remain anonymous.