Tube cross-reference
6S4S alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6S4S power - triode. Compare core specifications and verify every restriction before using a replacement.
No alternatives recorded
Tube Tinker does not currently have an exact variation or directional substitution recorded for 6S4S.
Verify before substituting
Matching a base or heater voltage is not enough to prove that two tubes are interchangeable. Check pin connections, heater current, maximum ratings, bias requirements, warm-up behavior, and the equipment manufacturer’s service documentation before making a substitution.
View the complete 6S4S specifications →