| (up)date
     | item
     | size
   | 
    | 2003-03-30
     | Display tubes for digits and signs (nixie)
     | 693,754 bytes (de)
   | 
    | 2014-02-14
     | Senderöhren (transmitting tubes), 1970, 180 pages.
     | 7,492,364 bytes (de)
   | 
    | 2014-02-24
     | Höchstfrequenzröhren (Microwave Tubes), 1967, 153 pages.
     | 7,032,983 bytes (de)
   | 
    | 2014-03-02
     | Gasentladungsröhren (Gas Discharge Tubes), 1971, 114 pages.
     | 7,263,281 bytes (de)
   | 
    | 2022-10-16
     | Empfängerröhren (receiving tubes), 1965, 234 pages.
     | 50,997,106 bytes (de)
   | 
    | 2022-10-16
     | Empfängerröhren (receiving tubes), 1966, 252 pages
     | 54,651,070 bytes (de)
   | 
    | 2022-10-16
     | Spezialröhren (special tubes), 1959, 212 pages.
     | 30,118,890 bytes (de)
   | 
    | 2022-10-16
     | Spezialröhren (special tubes), 1961, 202 pages.
     | 42,234,324 bytes (de)
   | 
    | 2024-06-15
     | Tubes à Hyperfréquences (Microwave Tubes), 1966, 8 pages.
     | 3,080,717 bytes (fr)
   | 
    | 2024-06-15
     | Tubes à Hyperfréquences (Microwave Tubes), 1967, 12 pages.
     | 3,818,449 bytes (fr)
   | 
    | 2024-06-15
     | Bildwiedergaberöhren (CRT's), 1970, 8 pages.
     | 2,105,286 bytes (de)
   | 
    | 2024-06-15
     | Gas Discharge Tubes, 1964, 100 pages.
     | 25,916,644 bytes
   | 
    | 2024-06-15
     | Gasentladungsröhren (Gas Discharge Tubes), 1971, 8 pages.
     | 2,315,250 bytes (de)
   | 
    | 2024-06-15
     | Hinweise zur anwendung von Anzeigröhren (application info digit display tubes), 1969, 45 pages.
     | 12,858,211 bytes
   | 
    | 2024-06-15
     | Kontakt mit aller Welt (contact with the whole world), 1968, 86 pages.
     | 31,316,026 bytes
   | 
    | 2024-06-15
     | RFT_Superorthikon_1966.pdf, 1966, 12 pages.
     | 3,278,261 bytes (de)
   | 
    | 2024-06-15
     | Tubes Analysateurs de Télévision (endikons, orthicons), 1967, 12 pages.
     | 3,897,821 bytes (fr)
   | 
    | 2024-06-15
     | Ziffern-undZeichenanzeigeröhren (nixie's), 1971, 8 pages.
     | 2,069,406 bytes (de)
 |