Tube cross-reference
OD3A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the OD3A voltage regulator. Compare core specifications and verify every restriction before using a replacement.
Where OD3A can be used as the replacement
In these recorded relationships, OD3A is the replacement tube. The listed original tubes are not automatically suitable as replacements for OD3A.
Voltage Regulator
The database records OD3A as a possible replacement forVR150.
No special restrictions are recorded for this substitution.
| Specification | OD3A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Regulator | Voltage Regulator |
| Construction | VoltageRegulator | VoltageRegulator |
| Base | 4AJ | 4AJ |
| Socket | IO | Not recorded |
| Base pins | 8 | 4 |
| 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 OD3A specifications →