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File:Triode REN904.jpg

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English: Triode REN 904. Early Telefunken vacuum tube. Manufactured ca. 1930 - 1935. The german book lying in the background is "Die Rundfunktechnik" by W.Lehmann, printed in 1930)
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Author 32bitmaschine

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31 August 2008

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current12:55, 31 August 2008Thumbnail for version as of 12:55, 31 August 20081,064 × 740 (195 KB)32bitmaschine{{Information |Description={{en|1=Triode REN 904. Early Telefunken vacuum tube. Manufactured ca. 1930 - 1935. The german book lying in the background is "Die Rundfunktechnik" by W.Lehmann, printed in 1930)}} |Source=Own work by uploader |Author=[[User:3

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