Tube cross-reference
6BK11 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6BK11 voltage - triple triode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6BK11
The following tubes are recorded as possible replacements for 6BK11. This direction does not establish that 6BK11 can replace them.
Voltage - Triple Triode
The database records 6K11 as a possible replacement for6BK11.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triple Triode | Voltage - Triple Triode |
| Construction | Triode-Triode-Triode | Triode-Triode-Triode |
| Base | Not recorded | E12-70 |
| Socket | B12C | B12C |
| Base pins | 12 | 12 |
| Sections | 3 | 3 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triple Triode
The database records 6Q11 as a possible replacement for6BK11.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triple Triode | Voltage - Triple Triode |
| Construction | Triode-Triode-Triode | Triode-Triode-Triode |
| Base | Not recorded | 12BY |
| Socket | B12C | B12C |
| Base pins | 12 | 12 |
| Sections | 3 | 3 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 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 6BK11 specifications →