Tube cross-reference
5731 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 5731 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 5731
The following tubes are recorded as possible replacements for 5731. This direction does not establish that 5731 can replace them.
Voltage - Triode (single)
The database records 955 as a possible replacement for5731.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | 5BC | 5BC |
| Socket | Not recorded | ACORN5 |
| Base pins | 5 | 5 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Voltage Pentode - High Frequency (single)
The database records E1F as a possible replacement for5731.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage Pentode - High Frequency (single) |
| Construction | Triode | Pentode |
| Base | 5BC | Not recorded |
| Socket | Not recorded | Not recorded |
| Base pins | 5 | Not recorded |
| 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 5731 specifications →