Tube cross-reference
6J40P alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6J40P voltage pentode or tetrode (under 100v). 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 6J40P.
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 6J40P specifications →