Tube cross-reference
XAA91 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the XAA91 diode (not rectifier). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for XAA91
The following tubes are recorded as possible replacements for XAA91. This direction does not establish that XAA91 can replace them.
Diode (NOT rectifier)
The database records 3AL5 as a possible replacement forXAA91.
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 | 3.15 V | 3.15 V |
| Heater current | 0.6 A | 0.6 A |
Where XAA91 can be used as the replacement
In these recorded relationships, XAA91 is the replacement tube. The listed original tubes are not automatically suitable as replacements for XAA91.
Diode (NOT rectifier)
The database records XAA91 as a possible replacement for3AL5.
No special restrictions are recorded for this substitution.
| Specification | XAA91 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 | 3.15 V | 3.15 V |
| Heater current | 0.6 A | 0.6 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 XAA91 specifications →