Tube cross-reference
1B48 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1B48 rectifier - half wave. Compare core specifications and verify every restriction before using a replacement.
Where 1B48 can be used as the replacement
In these recorded relationships, 1B48 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1B48.
Rectifier - Half Wave
The database records 1B48 as a possible replacement for5517.
No special restrictions are recorded for this substitution.
| Specification | 1B48 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - Half Wave |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | Not recorded | Not recorded |
| Heater current | Not recorded | Not recorded |
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 1B48 specifications →