Tube cross-reference
310B alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 310B voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 310B
The following tubes are recorded as possible replacements for 310B. This direction does not establish that 310B can replace them.
Voltage Pentode
The database records 310A as a possible replacement for310B.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7K |
| Socket | OCTAL6 | OCTAL7 |
| Base pins | 6 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 10 V | 10 V |
| Heater current | 0.32 A | 0.32 A |
Where 310B can be used as the replacement
In these recorded relationships, 310B is the replacement tube. The listed original tubes are not automatically suitable as replacements for 310B.
Voltage Pentode
The database records 310B as a possible replacement for310A.
No special restrictions are recorded for this substitution.
| Specification | 310B replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7K |
| Socket | OCTAL6 | OCTAL7 |
| Base pins | 6 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 10 V | 10 V |
| Heater current | 0.32 A | 0.32 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 310B specifications →