Fanö (device)

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Fanö was the code name of a German radio measuring device used in World War II , more precisely a radio measuring observation device (FuMB) for decimeter waves . The official military name of the device was "Fu MB 5" (often written: "FuMB 5"), while the manufacturer Rohde & Schwarz (R&S) had given it the type designation "RS 1/20 DM / 43", from which the year of development 1943 can be derived.

description

FuMB 5 (Fano) was used for reception of electromagnetic waves in the frequency range from 400 MHz to 1600 MHz, which is now also known as UHF for English ultra high frequency is referred to. The measuring receiver works according to the heterodyne principle . The external appearance is similar to that of the FuMB 4 (Samos) from the same manufacturer, which covers the frequency range from 90 MHz to 470 MHz. Fanö is therefore to be understood as a higher-frequency supplement to Samos. The military designation FuMB 5 shows that there were other radio measurement monitoring devices. This also includes FuMB 1 (Metox) , FuMB 7 (Naxos) , FuMB 8 (Cyprus), FuMB 9 (Wanze), FuMB 10 (Borkum), FuMB 11 (Corfu), FuMB 26 (Tunis), FuMB 35 (Athos) and FuMB 37 (Leros).

use

Samos was used on airplanes, ships and especially on submarines to detect enemy radio signals ( radar ) and, together with a suitable antenna, served the purpose of a radar warning device . In conjunction with a suitable DF antenna , the direction of the broadcasts could also be determined. Fanö has a "Search" / "Peilen" switch for this purpose. The active in the search reception automatic gain control ( "regulated") is used to Peilempfang deactivated ( "unregulated") thereby allowing the used for direction finding minimum search .

Another application was the calibration of our own active radio measuring devices (FuMG), such as the FuMG 62 (Würzburg) .

literature

  • Arthur O. Bauer: Radio direction finding as an Allied weapon against German submarines 1939-1945. How weaknesses and failures in the radio control of the submarines contributed to the outcome of the “Battle of the Atlantic”. Arthur O. Bauer Selbstverlag, Diemen , The Netherlands 1997, p. 196, ISBN 3-00-002142-6 .
  • Brian Johnson: Top Secret - Science and Technology in World War II. Motorbuch-Verlag, Stuttgart 1983, ISBN 978-3-87943-816-7 .
  • Jochen Brennecke: The turning point in the submarine war - causes and consequences 1939–1943. Köhlers Verlags-Ges. 1984. ISBN 978-3-7822-0281-7 .
  • Fritz Trenkle : The German radio measurement process until 1945. Motorbuch-Verlag, Stuttgart 1979. ISBN 3-87943-668-1 .

Web links

Individual evidence

  1. ↑ Radio measurement observation systems , accessed on June 18, 2019.