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Frank's electron Tube Data sheets Brown Boveri documents  

(up)date item size
2007-04-06 Brown Boveri - Tubes d'Émission, Valves Redresseuzez. Thanks to André Cubert. 6,774,816 bytes
2016-02-25 Brown Boveri - Thyristors. 8,982,162 bytes
2016-02-25 Brown Boveri - Electron Tubes. 25,859,702 bytes
2019-01-14 Strahlungs Gekuehlte Sende- Und Spezial Roehren
Radiation cooled transmitting- and special tubes
112,016,316 bytes, 609 pages