Tube cross-reference
6140 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6140 voltage regulator. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6140
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
423A Voltage Regulator
- Base
- Not recorded
- Socket
- UX4
- Base pins
- 4
- Sections
- 1
- Heater voltage
- Not recorded
- Heater current
- Not recorded
Where 6140 can be used as the replacement
In these recorded relationships, 6140 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6140.
Voltage Regulator
The database records 6140 as a possible replacement for423A.
No special restrictions are recorded for this substitution.
| Specification | 6140 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Regulator | Voltage Regulator |
| Construction | VoltageRegulator | VoltageRegulator |
| Base | Not recorded | Not recorded |
| Socket | B9A | UX4 |
| Base pins | 9 | 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 6140 specifications →