Tube cross-reference
EL41 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EL41 power - pentode single (not beam) (under 10w). Compare core specifications and verify every restriction before using a replacement.
Exact variations of EL41
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.
6CK5 Power - Pentode Single (NOT beam) (under 10W)
- Base
- OCTAL
- Socket
- IO
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.7 A
Replacement tubes for EL41
The following tubes are recorded as possible replacements for EL41. This direction does not establish that EL41 can replace them.
Power - Pentode Single (NOT beam) (under 10W)
The database records 6CK5 as a possible replacement forEL41.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | B8A | OCTAL |
| Socket | B8A | IO |
| Base pins | 8 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.71 A | 0.7 A |
Where EL41 can be used as the replacement
In these recorded relationships, EL41 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EL41.
Power - Pentode Single (NOT beam) (under 10W)
The database records EL41 as a possible replacement for6CK5.
No special restrictions are recorded for this substitution.
| Specification | EL41 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | B8A | OCTAL |
| Socket | B8A | IO |
| Base pins | 8 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.71 A | 0.7 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 EL41 specifications →