Tube cross-reference
ECL84 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the ECL84 voltage triode pentode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of ECL84
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.
6DX8 Voltage Pentode - Sharp Cutoff (single)
- Base
- 9HX
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.72 A
Replacement tubes for ECL84
The following tubes are recorded as possible replacements for ECL84. This direction does not establish that ECL84 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 6DX8 as a possible replacement forECL84.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Triode Pentode | Voltage Pentode - Sharp Cutoff (single) |
| 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 ECL84 can be used as the replacement
In these recorded relationships, ECL84 is the replacement tube. The listed original tubes are not automatically suitable as replacements for ECL84.
Voltage Pentode - Sharp Cutoff (single)
The database records ECL84 as a possible replacement for6DX8.
No special restrictions are recorded for this substitution.
| Specification | ECL84 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Triode Pentode | Voltage Pentode - Sharp Cutoff (single) |
| 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 ECL84 specifications →