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