Tube cross-reference
EF731 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EF731 voltage pentode - remote cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of EF731
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 EF731
The following tubes are recorded as possible replacements for EF731. This direction does not establish that EF731 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records 5899 as a possible replacement forEF731.
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 EF731 can be used as the replacement
In these recorded relationships, EF731 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EF731.
Voltage Pentode - Remote Cutoff (single)
The database records EF731 as a possible replacement for5899.
No special restrictions are recorded for this substitution.
| Specification | EF731 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 EF731 specifications →