Tube cross-reference
6GU5 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6GU5 hexode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6GU5
The following tubes are recorded as possible replacements for 6GU5. This direction does not establish that 6GU5 can replace them.
Power - Beam Single (NOT sweep) (under 10W)
The database records 6FS5 as a possible replacement for6GU5.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Hexode | Power - Beam Single (NOT sweep) (under 10W) |
| Construction | Hexode | BeamPower |
| Base | Not recorded | 7GA |
| Socket | B12C | B9A |
| Base pins | 12 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.22 A | 0.2 A |
Where 6GU5 can be used as the replacement
In these recorded relationships, 6GU5 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6GU5.
Power - Beam Single (NOT sweep) (under 10W)
The database records 6GU5 as a possible replacement for6FS5.
- Parallel heater circuits only
| Specification | 6GU5 replacement | Original tube |
|---|---|---|
| Tube type | Hexode | Power - Beam Single (NOT sweep) (under 10W) |
| Construction | Hexode | BeamPower |
| Base | Not recorded | 7GA |
| Socket | B12C | B9A |
| Base pins | 12 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.22 A | 0.2 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 6GU5 specifications →