Tube cross-reference
9AQ8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 9AQ8 voltage - dual triode (similar). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 9AQ8
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
PCC85 Voltage - Dual Triode (similar)
- Base
- B9A
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 9 V
- Heater current
- 0.3 A
Replacement tubes for 9AQ8
The following tubes are recorded as possible replacements for 9AQ8. This direction does not establish that 9AQ8 can replace them.
Voltage - Dual Triode (similar)
The database records PCC85 as a possible replacement for9AQ8.
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 | Not recorded | B9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 9 V | 9 V |
| Heater current | 0.3 A | 0.3 A |
Where 9AQ8 can be used as the replacement
In these recorded relationships, 9AQ8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 9AQ8.
Voltage - Dual Triode (similar)
The database records 9AQ8 as a possible replacement forPCC85.
No special restrictions are recorded for this substitution.
| Specification | 9AQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | B9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 9 V | 9 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 9AQ8 specifications →