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Luftfahrtröhren
Vorläufiges Entwicklungsprogramm
(German language, pdf)
This information might show the state of developments about 1943
Not every artefact had
actually been used in GAF (German Air Force) apparatus. It, nevertheless, shows
interesting projects which had been commenced, during World War Two, by the
Dutch Philips company, who heavily had been involved in new valves (tube)
design. In my opinion, the “Rimlock” valves (40 series) which had been
introduced shortly after the end of WW II, originally goes back to German
sponsored development projects. The Germans demanded a thorough redesign of
miniature valves. Philips, in coordination with German procurement offices,
introduced an entirely new group of valve-holders. Such as, for instance, the
“Nasenkolben Größe B 2 (or A 1...C1...)". We can, however, notice that also
Lorenz and, of course, Telefunken had been engaged in this project as well.
The Rectron company mentioned in this paper, was a subsidiary of the Dutch
Philips Company, as was the Valvo Company in Hamburg, who represented the
Philips Radio Valve Industry in Germany.
Consider also: Telefunken valves
