Tube cross-reference
6AX3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6AX3 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Where 6AX3 can be used as the replacement
In these recorded relationships, 6AX3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6AX3.
Rectifier - Damper Diode
The database records 6AX3 as a possible replacement for6BJ3.
No special restrictions are recorded for this substitution.
| Specification | 6AX3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 12BL | 12BL |
| Socket | B12C | Not recorded |
| Base pins | 12 | 12 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 A |
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 6AX3 specifications →