Tube cross-reference
EL81 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EL81 power - tv horizontal output (sweep). Compare core specifications and verify every restriction before using a replacement.
Exact variations of EL81
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.
Replacement tubes for EL81
The following tubes are recorded as possible replacements for EL81. This direction does not establish that EL81 can replace them.
Power - TV Horizontal Output (sweep)
The database records 6CJ6 as a possible replacement forEL81.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - TV Horizontal Output (sweep) | Power - TV Horizontal Output (sweep) |
| Construction | Pentode | Pentode |
| Base | B9A | 9AS |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.05 A | 1.05 A |
Where EL81 can be used as the replacement
In these recorded relationships, EL81 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EL81.
Power - TV Horizontal Output (sweep)
The database records EL81 as a possible replacement for6CJ6.
No special restrictions are recorded for this substitution.
| Specification | EL81 replacement | Original tube |
|---|---|---|
| Tube type | Power - TV Horizontal Output (sweep) | Power - TV Horizontal Output (sweep) |
| Construction | Pentode | Pentode |
| Base | B9A | 9AS |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.05 A | 1.05 A |
Power - TV Horizontal Output (sweep)
The database records EL81 as a possible replacement for6DR6.
No special restrictions are recorded for this substitution.
| Specification | EL81 replacement | Original tube |
|---|---|---|
| Tube type | Power - TV Horizontal Output (sweep) | Power - TV Horizontal Output (sweep) |
| Construction | Pentode | Pentode |
| Base | B9A | Not recorded |
| Socket | B9A | Not recorded |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.05 A | 1.05 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 EL81 specifications →