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Tube Substitutions for:
 4GJ7
 Medium-Mu Triode - Sharp-Cutoff pentode
TypeSubstitutesBase Diagram
4GJ74GX7, 4GX7
Web References4GJ7 (RCA (RC30)) @ Franks Electron Tubes


Type 4GJ7
Medium-Mu Triode - Sharp-Cutoff pentode


MECHANICAL DATA
Basing9QA


ELECTRICAL DATA

HEATER CHARACTERISTICS
Heater Voltage4.2Volts
Heater Current0.6A


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