Tube cross-reference
12AZ7A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12AZ7A voltage - dual triode (similar). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 12AZ7A
The following tubes are recorded as possible replacements for 12AZ7A. This direction does not establish that 12AZ7A can replace them.
Voltage - Dual Triode (similar)
The database records 12AT7 as a possible replacement for12AZ7A.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9A | 9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.225 A | 0.15 A |
Voltage - Dual Triode (similar)
The database records 12AZ7 as a possible replacement for12AZ7A.
- Parallel heater circuits only
- No-warmup series circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9A | 9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.225 A | 0.225 A |
Where 12AZ7A can be used as the replacement
In these recorded relationships, 12AZ7A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12AZ7A.
Voltage - Dual Triode (similar)
The database records 12AZ7A as a possible replacement for12AT7.
- Parallel heater circuits only
| Specification | 12AZ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9A | 9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.225 A | 0.15 A |
Voltage - Dual Triode (similar)
The database records 12AZ7A as a possible replacement for12AZ7.
No special restrictions are recorded for this substitution.
| Specification | 12AZ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9A | 9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.225 A | 0.225 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 12AZ7A specifications →