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DBF-1
Radio direction finder - this page is a stub

DBF and DBF-1 were mobile radio direction finders (RDF), developed in 1945 by Bendix Radio in Baltimore (Maryland, USA) for the US Navy [1][2]. 1 The device uses the Adcock direction finding principle and is suitable for VHF frequencies between 100 and 156 MHz. It is uncertain whether it was released before the end of WWII, or shortly thereafter, probably in 1946 [2] or 1947 [2].

The image on the right was taken from page 1-0 of the original instruction book [A], and shows a complete DBF direction finder, consisting of the DBF receiver unit, a 5-element vertical Adcock antenna, and a test transmitter for calibration.

This page currently acts as a placeholder for current and future information about the DBF-1 radio direction finder of the US Navy. If you have additional information, please contact us.
  

  1. The development contract was issued on 6 December 1944.

Models
  • DBF
    This is the standard version, which is housed in a larger encosure with more controls.

  • DBF-1
    This version is functionally identical, but is more compact and simpler to operate.
Documentation
  1. Instruction Book for VHF Radio Direction Finder Equipment, Navy Model DBF-1
    Bendix Radio, 20 February 1947.

  2. DBF-1, Circuit diagrams
    Bendix Radio, 20 February 1947.
References
  1. US Navy, Contract number NXsr-77922
    6 December 1944.

  2. Bendix Radio Foundation Drawings Data Base, DBF-1
    Final drawing: 4 November 1945. Retrieved December 2020.

  3. Catalogue of Naval Electronic Equipment - Supplement 1
    January 1948. pp. D-30B — D30E.

  4. Directory of Communication Equipment, DBF, DBF-1 VHF RDF Equipment
    April 1958. pp. 1.3 DBF: 1 — 4.
Further information
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Crypto Museum. Created: Saturday 19 December 2020. Last changed: Sunday, 20 December 2020 - 21:46 CET.
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