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Frank's electron Tube Data sheets Machlett documents  

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2020-03-20 Some correspondence, 6 pages. 1,554,842 bytes
2020-03-20 Electron Tubes, 38 pages. 18,593,969 bytes
2020-03-20 Electron Tubes - Quick Reference Guide, 32 pages. 10,944,255 bytes
2020-03-20 Special Purpose Vidicons, 8pages. 3,014,727 bytes
2020-03-20 UHF Planar Triodes, 92 pages. 46,588,224 bytes