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Tube Substitutions for:
 5638
 Amplifier Pentode
TypeSubstitutesBase Diagram
56385638
Web References5638 (Sylvania) @ Franks Electron Tubes
5638 @ RadioMuseum.org


Type 5638
Amplifier Pentode


MECHANICAL DATA
Basing5638


ELECTRICAL DATA

HEATER CHARACTERISTICS
Heater Voltage6.3Volts
Heater Current0.15A


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