Tube cross-reference
1D8GT alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1D8GT voltage triode pentode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 1D8GT
The following tubes are recorded as possible replacements for 1D8GT. This direction does not establish that 1D8GT can replace them.
Power - Beam (NOT sweep)
The database records 1B8GT as a possible replacement for1D8GT.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Triode Pentode | Power - Beam (NOT sweep) |
| Construction | Diode-Pentode-Triode | BeamPower-Diode-Triode |
| Base | 8AJ | Not recorded |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 3 | 3 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.1 A | 0.1 A |
Where 1D8GT can be used as the replacement
In these recorded relationships, 1D8GT is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1D8GT.
Power - Beam (NOT sweep)
The database records 1D8GT as a possible replacement for1B8GT.
- Not suitable for all circuits
| Specification | 1D8GT replacement | Original tube |
|---|---|---|
| Tube type | Voltage Triode Pentode | Power - Beam (NOT sweep) |
| Construction | Diode-Pentode-Triode | BeamPower-Diode-Triode |
| Base | 8AJ | Not recorded |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 3 | 3 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.1 A | 0.1 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 1D8GT specifications →