Tube cross-reference
2FS5 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 2FS5 hexode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 2FS5
The following tubes are recorded as possible replacements for 2FS5. This direction does not establish that 2FS5 can replace them.
Hexode
The database records 2GU5 as a possible replacement for2FS5.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Hexode | Hexode |
| Construction | Hexode | Hexode |
| Base | 7GA | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.4 V | 2.4 V |
| Heater current | 0.6 A | 0.6 A |
Where 2FS5 can be used as the replacement
In these recorded relationships, 2FS5 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 2FS5.
Hexode
The database records 2FS5 as a possible replacement for2GU5.
No special restrictions are recorded for this substitution.
| Specification | 2FS5 replacement | Original tube |
|---|---|---|
| Tube type | Hexode | Hexode |
| Construction | Hexode | Hexode |
| Base | 7GA | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.4 V | 2.4 V |
| Heater current | 0.6 A | 0.6 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 2FS5 specifications →