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Frank's electron Tube Data sheets Fivre documents  

(up)date item size
2012-12-28 Fivre Transmitting Tubes 1939. Thanks to Cesare Maschio. 3,071,337 bytes (it)
2013-01-19 Fivre Receiving Tubes. Thanks to Cesare Maschio. 7,898,498 bytes (it)
2019-11-10 Monochrome Cathode-ray Tubes, 10 pages. 5,890,697 bytes