Tube cross-reference
EF71 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EF71 voltage pentode - remote cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of EF71
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 EF71
The following tubes are recorded as possible replacements for EF71. This direction does not establish that EF71 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records 5899 as a possible replacement forEF71.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 8DL |
| Socket | WIRE8 | B8D |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Where EF71 can be used as the replacement
In these recorded relationships, EF71 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EF71.
Voltage Pentode - Remote Cutoff (single)
The database records EF71 as a possible replacement for5900.
No special restrictions are recorded for this substitution.
| Specification | EF71 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 8DL |
| Socket | WIRE8 | B8D |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 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 EF71 specifications →