Köln (Koeln) E 52 releated topics.

Shown here is a Köln E52a

The Köln receiver, may be regarded to be a milestone receiver project (Telefunken 1939 - 1943). I have dealt with it already on different occasions (consider the list of links). This page will link you to all related information available on this website. I am dedicated to this subject since the end of the 1960s.

Patents related to Köln design have, to my knowledge, not attracted interest of technology historians. I have been engaged in patent research since more than a decade, and came across very rare patent information, greatly thanks to my friend Tom Going.

My opinion is, that nothing comparable has been produced in the entire world during 1939-1945. One may regard that it was a too expensive (and complicated) artefact, though, from the engineering perspective, it was a great technical achievement. And, it still is a wanted collectors item.

•  Köln E 52, how to re-calibrate its first local oscillator professionally?

•  Eichmaschine(Anlage), automatic photographical scale calibration apparatus (patent)

•  Krachtöter of E52a (noise limiter) (patent)

•  Köln E52 microfilm glass scale patents and photos

•  Photograph selection, beased on the 1941 Telefunken catalogue, called "Luftboden-  Empfänger-Programm"

•  Luftboden-Empfänger-Programm, related patents derived from Patent-Auszüge

•  My IEEE 2004 paper on: “The significance of German electronic engineering in the 1930s”

•  The original Telefunken catalogue of 1941 on Köln (Koeln) E52 receiver "Luft-Bodenprogramm"

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