Tube cross-reference
12B7 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12B7 voltage pentode - remote cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 12B7
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.
14A7 Voltage Pentode - Remote Cutoff (single)
- Base
- 8V
- Socket
- LOCTAL8
- Base pins
- 8
- Sections
- 1
- Heater voltage
- 12.6 V
- Heater current
- 0.15 A
Replacement tubes for 12B7
The following tubes are recorded as possible replacements for 12B7. This direction does not establish that 12B7 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records 12B7ML as a possible replacement for12B7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 8V | Not recorded |
| Socket | B8G | B8G |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Voltage Pentode - Remote Cutoff (single)
The database records 14A7 as a possible replacement for12B7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 8V | 8V |
| Socket | B8G | LOCTAL8 |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Voltage Pentode - Remote Cutoff (single)
The database records 14H7 as a possible replacement for12B7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 8V | 8V |
| Socket | B8G | B8G |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.16 A |
Where 12B7 can be used as the replacement
In these recorded relationships, 12B7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12B7.
Voltage Pentode - Remote Cutoff (single)
The database records 12B7 as a possible replacement for12B7ML.
No special restrictions are recorded for this substitution.
| Specification | 12B7 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 8V | Not recorded |
| Socket | B8G | B8G |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Voltage Pentode - Remote Cutoff (single)
The database records 12B7 as a possible replacement for14A7.
No special restrictions are recorded for this substitution.
| Specification | 12B7 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 8V | 8V |
| Socket | B8G | LOCTAL8 |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Voltage Pentode - Remote Cutoff (single)
The database records 12B7 as a possible replacement for14H7.
No special restrictions are recorded for this substitution.
| Specification | 12B7 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 8V | 8V |
| Socket | B8G | B8G |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.16 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 12B7 specifications →