Tube cross-reference
6BK8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6BK8 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6BK8
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.
EF83 Voltage Pentode - Remote Cutoff (single)
- Base
- NOVAL
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.2 A
Replacement tubes for 6BK8
The following tubes are recorded as possible replacements for 6BK8. This direction does not establish that 6BK8 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records EF83 as a possible replacement for6BK8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | NOVAL |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 A |
Where 6BK8 can be used as the replacement
In these recorded relationships, 6BK8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6BK8.
Voltage Pentode - Remote Cutoff (single)
The database records 6BK8 as a possible replacement forEF83.
No special restrictions are recorded for this substitution.
| Specification | 6BK8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | NOVAL |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 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 6BK8 specifications →