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Cobham’s DFS-43A Automatic Direction Finding System is an all-digital system designed to provide precise ADF navigation reception from multiple beacons, markers, and stations.

Cobham's DFS-43A  Automatic Direction Finding System, employs microprocessor-controlled signal processing and a self-calibration routine to ensure the display of accurate ADF information.  The receiver may be tuned via ARINC 429 digital data bus, individual control units, the Series III RMS 555 Radio Management System, or with Flight Management Systems.



  1. Left/right steering guidance to/from NDB
  2. Autopilot interface
  3. Continuous self-test
  4. Half- or whole-kHz channel spacing
  5. Specially-designed loop/sense antenna
  6. Improved station overfly sensitivity
  7. Weight: 5.64 lb. / 2.56 kg
  8. 4.10" W x 4.00" H x 13.33" L
  9. Power requirement: 27.5 Vdc aircraft power (+/- 20%) 
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