Tube cross-reference
38A3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 38A3 rectifier - half wave. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 38A3
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.
UY85 Rectifier - Half Wave
- Base
- Noval
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 38 V
- Heater current
- 0.1 A
Replacement tubes for 38A3
The following tubes are recorded as possible replacements for 38A3. This direction does not establish that 38A3 can replace them.
Rectifier - Half Wave
The database records UY85 as a possible replacement for38A3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - Half Wave |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Noval |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 38 V | 38 V |
| Heater current | 0.1 A | 0.1 A |
Where 38A3 can be used as the replacement
In these recorded relationships, 38A3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 38A3.
Rectifier - Half Wave
The database records 38A3 as a possible replacement forUY85.
No special restrictions are recorded for this substitution.
| Specification | 38A3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - Half Wave |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Noval |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 38 V | 38 V |
| Heater current | 0.1 A | 0.1 A |
Rectifier - Half Wave
The database records 38A3 as a possible replacement forUY89.
No special restrictions are recorded for this substitution.
| Specification | 38A3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - Half Wave |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Noval |
| Socket | B9A | B9A |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 38 V | 31 V |
| Heater current | 0.1 A | 0.1 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 38A3 specifications →