Tube cross-reference
6021 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6021 voltage - dual triode (similar). Compare core specifications and verify every restriction before using a replacement.
Where 6021 can be used as the replacement
In these recorded relationships, 6021 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6021.
Voltage - Dual Triode (similar)
The database records 6021 as a possible replacement forECC70.
No special restrictions are recorded for this substitution.
| Specification | 6021 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 8DG | Not recorded |
| Socket | B8D | SUBMINIATURE8 |
| Base pins | 8 | 8 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 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 6021 specifications →