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