Tube cross-reference
6LJ8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6LJ8 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6LJ8
The following tubes are recorded as possible replacements for 6LJ8. This direction does not establish that 6LJ8 can replace them.
Voltage Triode Pentode
The database records 6GD7 as a possible replacement for6LJ8.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9GF | 9GF |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.38 A |
Voltage Triode Pentode
The database records 6MB8 as a possible replacement for6LJ8.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9GF | 9FA |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Where 6LJ8 can be used as the replacement
In these recorded relationships, 6LJ8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6LJ8.
Voltage Triode Pentode
The database records 6LJ8 as a possible replacement for6GD7.
- Not suitable for all circuits
| Specification | 6LJ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9GF | 9GF |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.38 A |
Voltage Triode Pentode
The database records 6LJ8 as a possible replacement for6MB8.
- Not suitable for all circuits
| Specification | 6LJ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9GF | 9FA |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 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 6LJ8 specifications →