Tube cross-reference
12J5 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12J5 voltage - triode (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 12J5
The following tubes are recorded as possible replacements for 12J5. This direction does not establish that 12J5 can replace them.
Voltage - Triode (single)
The database records 12J5WGT as a possible replacement for12J5.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | 60 | 60 |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Voltage - Triode (single)
The database records 12J5GT as a possible replacement for12J5.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | 60 | 60 |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Where 12J5 can be used as the replacement
In these recorded relationships, 12J5 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12J5.
Tuning Indicator
The database records 12J5 as a possible replacement for12E5GT.
No special restrictions are recorded for this substitution.
| Specification | 12J5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Tuning Indicator |
| Construction | Triode | Triode-TuningIndicator |
| Base | 60 | 60 |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 2 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Voltage - Triode (single)
The database records 12J5 as a possible replacement for12J5GT.
No special restrictions are recorded for this substitution.
| Specification | 12J5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | 60 | 60 |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 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 12J5 specifications →