Tube cross-reference
6CU5 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6CU5 power - beam single (not sweep) (under 10w). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6CU5
The following tubes are recorded as possible replacements for 6CU5. This direction does not establish that 6CU5 can replace them.
6AS5
Receiving TubesPower - Beam Single (NOT sweep) (under 10W)
The database records 6AS5 as a possible replacement for6CU5.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Beam Single (NOT sweep) (under 10W) |
| Construction | BeamPower | BeamPower |
| Base | 7CY | 7 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 0.8 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 6CU5 specifications →