Tube cross-reference
6DT8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6DT8 voltage - dual triode (similar high frequency). Compare core specifications and verify every restriction before using a replacement.
Where 6DT8 can be used as the replacement
In these recorded relationships, 6DT8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6DT8.
6AQ8
Receiving TubesVoltage - Dual Triode (similar)
The database records 6DT8 as a possible replacement for6AQ8.
- Parallel heater circuits only
| Specification | 6DT8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9DE | B9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.435 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 6DT8 specifications →