Tube cross-reference
UU9 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the UU9 rectifier - full wave. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for UU9
The following tubes are recorded as possible replacements for UU9. This direction does not establish that UU9 can replace them.
Rectifier - Full Wave
The database records 6BT4 as a possible replacement forUU9.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Full Wave | Rectifier - Full Wave |
| Construction | Rectifier-Rectifier | Rectifier-Rectifier |
| Base | Not recorded | OCTAL |
| Socket | Not recorded | IO |
| Base pins | Not recorded | 8 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.63 A | 0.6 A |
Where UU9 can be used as the replacement
In these recorded relationships, UU9 is the replacement tube. The listed original tubes are not automatically suitable as replacements for UU9.
Rectifier - Full Wave
The database records UU9 as a possible replacement for6BT4.
- Parallel heater circuits only
| Specification | UU9 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Full Wave | Rectifier - Full Wave |
| Construction | Rectifier-Rectifier | Rectifier-Rectifier |
| Base | Not recorded | OCTAL |
| Socket | Not recorded | IO |
| Base pins | Not recorded | 8 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.63 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 UU9 specifications →