Tube cross-reference
12L8GT alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12L8GT voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 12L8GT
The following tubes are recorded as possible replacements for 12L8GT. This direction does not establish that 12L8GT can replace them.
Power - Pentode (NOT beam)
The database records 1644 as a possible replacement for12L8GT.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Power - Pentode (NOT beam) |
| Construction | Diode-Pentode | Pentode-Pentode |
| Base | 8BU | 8BU |
| Socket | IO | Not recorded |
| Base pins | 8 | 8 |
| Sections | 2 | 2 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Where 12L8GT can be used as the replacement
In these recorded relationships, 12L8GT is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12L8GT.
Power - Pentode (NOT beam)
The database records 12L8GT as a possible replacement for1644.
No special restrictions are recorded for this substitution.
| Specification | 12L8GT replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Power - Pentode (NOT beam) |
| Construction | Diode-Pentode | Pentode-Pentode |
| Base | 8BU | 8BU |
| Socket | IO | Not recorded |
| Base pins | 8 | 8 |
| Sections | 2 | 2 |
| 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 12L8GT specifications →