Tube cross-reference
6DX8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6DX8 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6DX8
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
ECL84 Voltage Triode Pentode
- Base
- 9HX
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.72 A
Replacement tubes for 6DX8
The following tubes are recorded as possible replacements for 6DX8. This direction does not establish that 6DX8 can replace them.
Voltage Triode Pentode
The database records ECL84 as a possible replacement for6DX8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9HX | 9HX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.72 A | 0.72 A |
Where 6DX8 can be used as the replacement
In these recorded relationships, 6DX8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6DX8.
Voltage Triode Pentode
The database records 6DX8 as a possible replacement forECL84.
No special restrictions are recorded for this substitution.
| Specification | 6DX8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9HX | 9HX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.72 A | 0.72 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 6DX8 specifications →