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Tube Substitutions for:
REN704d
Dual-Grid Tetrode

Type	Substitutes	Base Diagram
REN704d	U4100D, DG4101, E441N, NDG4, E441
Web References	REN704d (Telefunken) @ Franks Electron Tubes? REN704d (Telefunken) @ Franks Electron Tubes? REN704d (Telefunken) @ Franks Electron Tubes? REN704D @ Radiomuseum

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