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Partial File Text Western Electric 257A Vacuum Tube Classification--Sm all, filam entary triode T h e 2 5 7 A tu b e is sim ila r t o th e 2 3 1 D tu b e e x c ep t t h a t th e grid t e r m in a l o f th e 2 5 7
Datasheet Type Scan
RoHS Unknown
Pb Free Unknown
Lifecycle Unknown

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