Nostalgia Air: Tube Substitution for AL1

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Tube Substitutions for:
AL1
Vacuum Pentode

Type	Substitutes	Base Diagram
AL1	TL1, TAL1, 9PW4L, WE35, RAL1, VAL1, 4A23_Ultron, UAL1, A4S2, VP1
Web References	AL1 (Philips) @ Franks Electron Tubes? AL1 (Philips) @ Franks Electron Tubes? AL1 @ Radiomuseum