Tube cross-reference
UF41 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the UF41 voltage pentode - remote cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of UF41
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.
12AC5 Voltage Pentode - Remote Cutoff (single)
- Base
- NOVAL
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 12.6 V
- Heater current
- 0.1 A
Replacement tubes for UF41
The following tubes are recorded as possible replacements for UF41. This direction does not establish that UF41 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records 12AC5 as a possible replacement forUF41.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | NOVAL |
| Socket | B8A | B9A |
| Base pins | 8 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.1 A | 0.1 A |
Where UF41 can be used as the replacement
In these recorded relationships, UF41 is the replacement tube. The listed original tubes are not automatically suitable as replacements for UF41.
Voltage Pentode - Remote Cutoff (single)
The database records UF41 as a possible replacement for12AC5.
No special restrictions are recorded for this substitution.
| Specification | UF41 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | NOVAL |
| Socket | B8A | B9A |
| Base pins | 8 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 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 UF41 specifications →