| electron Tube Data sheets |
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| Mashpriborintorg documents |
| (up)date | item | size |
| 2004-01-05 | Mashpriborintorg - Soviet tube data book ☆Franz Hamberger☆ | 7,459,476 bytes |
| 2022-09-16 | Mashpriborintorg - Electronic Tubes II, 202 pages. | 23,190,471 bytes |