Tube cross-reference
9AK8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 9AK8 voltage - triode (with diode, heptode or hexode). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 9AK8
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.
PABC80 Voltage - Triode (with diode, heptode or hexode)
- Base
- Not recorded
- Socket
- B9A
- Base pins
- 9
- Sections
- 4
- Heater voltage
- 9.5 V
- Heater current
- 0.3 A
Replacement tubes for 9AK8
The following tubes are recorded as possible replacements for 9AK8. This direction does not establish that 9AK8 can replace them.
Voltage - Triode (with diode, heptode or hexode)
The database records PABC80 as a possible replacement for9AK8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (with diode, heptode or hexode) | Voltage - Triode (with diode, heptode or hexode) |
| Construction | Diode-Diode-Diode-Triode | Diode-Diode-Diode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 4 | 4 |
| Heater voltage | 9.5 V | 9.5 V |
| Heater current | 0.3 A | 0.3 A |
Where 9AK8 can be used as the replacement
In these recorded relationships, 9AK8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 9AK8.
Voltage - Triode (with diode, heptode or hexode)
The database records 9AK8 as a possible replacement forPABC80.
No special restrictions are recorded for this substitution.
| Specification | 9AK8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (with diode, heptode or hexode) | Voltage - Triode (with diode, heptode or hexode) |
| Construction | Diode-Diode-Diode-Triode | Diode-Diode-Diode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 4 | 4 |
| Heater voltage | 9.5 V | 9.5 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 9AK8 specifications →