Tube cross-reference
12BU6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12BU6 voltage - triode (with diode, heptode or hexode). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 12BU6
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.
12BF6 Voltage - Triode (with diode, heptode or hexode)
- Base
- Not recorded
- Socket
- B7G
- Base pins
- 7
- Sections
- 3
- Heater voltage
- 12.6 V
- Heater current
- 0.15 A
Replacement tubes for 12BU6
The following tubes are recorded as possible replacements for 12BU6. This direction does not establish that 12BU6 can replace them.
Voltage - Triode (with diode, heptode or hexode)
The database records 12BF6 as a possible replacement for12BU6.
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-Triode | Diode-Diode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 3 | 3 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.3 A | 0.15 A |
Where 12BU6 can be used as the replacement
In these recorded relationships, 12BU6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12BU6.
Voltage - Triode (with diode, heptode or hexode)
The database records 12BU6 as a possible replacement for12BF6.
No special restrictions are recorded for this substitution.
| Specification | 12BU6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (with diode, heptode or hexode) | Voltage - Triode (with diode, heptode or hexode) |
| Construction | Diode-Diode-Triode | Diode-Diode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 3 | 3 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.3 A | 0.15 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 12BU6 specifications →