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Tube Substitutions for:
12B4A
Triode
TypeSubstitutesBase Diagram
12B4A12B4*†
Notes:* - Parallel filaments
† - Series circuit no controlled warm-up
Web References12B4A (RCA (HB3)) @ Franks Electron Tubes
12B4A (Tung-Sol) @ Franks Electron Tubes
12B4A (RCA (RC30)) @ Franks Electron Tubes
12B4A @ RadioMuseum.org


Type 12B4A
Triode



MECHANICAL DATA

Basing9AG


ELECTRICAL DATA


HEATER CHARACTERISTICS
Heater Voltage12.6/6.3Volts
Heater Current0.3/0.6A


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