Home  Resources  References  Tubes  Forums  Links  Support  Sale 

Tube Substitutions for:
6681
High-Mu Twin Triode
TypeSubstitutesBase Diagram
668112AX7, 12AX7WA, 5721, 6057, 7494, 7729
Web References6681 (RCA (HB3)) @ Franks Electron Tubes
6681 (Tung-Sol) @ Franks Electron Tubes
6681 (Sylvania) @ Franks Electron Tubes
6681 (RCA (RC30)) @ Franks Electron Tubes
6681 @ RadioMuseum.org


Type 6681
High-Mu Twin Triode



MECHANICAL DATA

Basing9A


ELECTRICAL DATA


HEATER CHARACTERISTICS
Heater Voltage12.6Volts
Heater Current0.15A


© 1996-2021 Nostalgia Air