Tube cross-reference
EL91 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EL91 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of EL91
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.
6AM5 Power - Pentode Single (NOT beam) (under 10W)
- Base
- 6CH
- Socket
- B7G
- Base pins
- 6
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.2 A
Replacement tubes for EL91
The following tubes are recorded as possible replacements for EL91. This direction does not establish that EL91 can replace them.
Power - Pentode Single (NOT beam) (under 10W)
The database records 6AM5 as a possible replacement forEL91.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 6CH |
| Socket | B7G | B7G |
| Base pins | 7 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 A |
Where EL91 can be used as the replacement
In these recorded relationships, EL91 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EL91.
Power - Pentode Single (NOT beam) (under 10W)
The database records EL91 as a possible replacement for6AM5.
No special restrictions are recorded for this substitution.
| Specification | EL91 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 6CH |
| Socket | B7G | B7G |
| Base pins | 7 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 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 EL91 specifications →