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Tube Substitutions for:
4FS7
Triode-Pentode
Type
Substitutes
Base Diagram
4FS7
4HG8
,
4HG8
9MP
Web References
4FS7 (Mullard) @ Franks Electron Tubes
4FS7 @ RadioMuseum.org
Type
4FS7
Triode-Pentode
MECHANICAL DATA
Basing
9MP
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