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Tube Substitutions for:
 HA1
 Triode, vacuum
TypeSubstitutesBase Diagram
HA1NR50, CV1171, A40_Mazda
Web ReferencesHA1 (Osram) @ Franks Electron Tubes?
HA1 (Marconi) @ Franks Electron Tubes?
HA1 @ Radiomuseum


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