Tube cross-reference
6AQ8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6AQ8 voltage - dual triode (similar). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6AQ8
The following tubes are recorded as possible replacements for 6AQ8. This direction does not establish that 6AQ8 can replace them.
Voltage - Dual Triode (similar high frequency)
The database records 6L12 as a possible replacement for6AQ8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | B9A | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | Not recorded |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.435 A | 0.435 A |
Voltage - Dual Triode (similar)
The database records B719 as a possible replacement for6AQ8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | B9A | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.435 A | 0.435 A |
Voltage - Dual Triode (similar)
The database records ECC85 as a possible replacement for6AQ8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | B9A | 9C12 |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.435 A | 0.435 A |
Voltage - Dual Triode (similar high frequency)
The database records 6DT8 as a possible replacement for6AQ8.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | B9A | 9DE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.435 A | 0.3 A |
Where 6AQ8 can be used as the replacement
In these recorded relationships, 6AQ8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6AQ8.
Voltage - Dual Triode (similar high frequency)
The database records 6AQ8 as a possible replacement for6L12.
No special restrictions are recorded for this substitution.
| Specification | 6AQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | B9A | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | Not recorded |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.435 A | 0.435 A |
Voltage - Dual Triode (similar)
The database records 6AQ8 as a possible replacement forB719.
No special restrictions are recorded for this substitution.
| Specification | 6AQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | B9A | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.435 A | 0.435 A |
Voltage - Dual Triode (similar)
The database records 6AQ8 as a possible replacement forECC85.
No special restrictions are recorded for this substitution.
| Specification | 6AQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | B9A | 9C12 |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.435 A | 0.435 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 6AQ8 specifications →