| electron Tube Data sheets | 
       
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     | Fivre documents | 
| (up)date | item | size | 
| 2012-12-28 | Fivre Transmitting Tubes 1939. ☆Cesare Maschio☆ | 3,071,337 bytes (it) | 
| 2013-01-19 | Fivre Receiving Tubes. ☆Cesare Maschio☆ | 7,898,498 bytes (it) | 
| 2019-11-10 | Monochrome Cathode-ray Tubes, 10 pages. | 5,890,697 bytes | 
| 2022-09-05 | Receiving Tubes, TV Picture Tubes, Quarz Crystal Units, 1968, 389 pages. | 58,896,696 bytes |