Tube cross-reference
E91AA alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the E91AA diode (not rectifier). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for E91AA
The following tubes are recorded as possible replacements for E91AA. This direction does not establish that E91AA can replace them.
Diode (NOT rectifier)
The database records 5726 as a possible replacement forE91AA.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode-Diode | Diode-Diode |
| Base | Not recorded | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Where E91AA can be used as the replacement
In these recorded relationships, E91AA is the replacement tube. The listed original tubes are not automatically suitable as replacements for E91AA.
Diode (NOT rectifier)
The database records E91AA as a possible replacement for5726.
No special restrictions are recorded for this substitution.
| Specification | E91AA replacement | Original tube |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode-Diode | Diode-Diode |
| Base | Not recorded | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 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 E91AA specifications →