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Tube Substitutions for:
4-400A
Power Tetrode

Type	Substitutes	Base Diagram
4-400A		5BK
Web References	4-400A (RCA (HB3)) @ Franks Electron Tubes 4-400A (Eimac) @ Franks Electron Tubes

Type 4-400A
Power Tetrode


MECHANICAL DATA

Basing

5BK

ELECTRICAL DATA

HEATER CHARACTERISTICS

Heater Voltage	5	Volts
Heater Current	14.5	A

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