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ID = 50037
Tube type:  Triode, vacuum   VHF 
Identical to F7004 = 5842 = 417A = CK5842

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Information source - - Manufacturers Literature   Catalogue CSF 1964
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417a.png F7004
Emilio Ciardiello

Just Qvigstad
F7004: Manufacturers data
Patrice Zeissloff

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