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Tube Substitutions for:
C1
Current Regulator, Iron in Hydrogen

Type	Substitutes	Base Diagram
C1	B13, 13U8_Ultron
Web References	C1 (Philips) @ Franks Electron Tubes? C1 (Philips) @ Franks Electron Tubes? C1 (Mullard) @ Franks Electron Tubes? C1 @ Radiomuseum

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