Tube cross-reference
7Y4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 7Y4 rectifier - full wave. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 7Y4
The following tubes are recorded as possible replacements for 7Y4. This direction does not establish that 7Y4 can replace them.
7Z4
Receiving TubesRectifier - Full Wave
The database records 7Z4 as a possible replacement for7Y4.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Full Wave | Rectifier - Full Wave |
| Construction | Rectifier-Rectifier | Rectifier-Rectifier |
| Base | 5AB | 5AB |
| Socket | B8G | B8G |
| Base pins | 8 | 8 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.5 A | 0.9 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 7Y4 specifications →