Tube cross-reference
OC3A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the OC3A voltage regulator. Compare core specifications and verify every restriction before using a replacement.
Where OC3A can be used as the replacement
In these recorded relationships, OC3A is the replacement tube. The listed original tubes are not automatically suitable as replacements for OC3A.
Voltage Regulator
The database records OC3A as a possible replacement forVR105.
No special restrictions are recorded for this substitution.
| Specification | OC3A 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 OC3A specifications →