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Tube Substitutions for:
 HK257B
 Beam Power Pentode
TypeSubstitutesBase Diagram
HK257B7BM
Web ReferencesHK257B (Heintz & Kaufman) @ Franks Electron Tubes
HK257B @ RadioMuseum.org


Type HK257B
Beam Power Pentode


MECHANICAL DATA
Basing7BM


ELECTRICAL DATA

HEATER CHARACTERISTICS
Heater Voltage5Volts
Heater Current7.5A


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