Tube cross-reference
1R4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1R4 rectifier - half wave. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 1R4
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.
1294 Voltage Radio Detector Converter
- Base
- Not recorded
- Socket
- Not recorded
- Base pins
- 8
- Sections
- 1
- Heater voltage
- 1.4 V
- Heater current
- 0.15 A
Replacement tubes for 1R4
The following tubes are recorded as possible replacements for 1R4. This direction does not establish that 1R4 can replace them.
Voltage Radio Detector Converter
The database records 1294 as a possible replacement for1R4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Half Wave | Voltage Radio Detector Converter |
| Construction | Rectifier | Diode |
| Base | 4AH | Not recorded |
| Socket | Not recorded | Not recorded |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.15 A | 0.15 A |
Where 1R4 can be used as the replacement
In these recorded relationships, 1R4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1R4.
Voltage Radio Detector Converter
The database records 1R4 as a possible replacement for1294.
No special restrictions are recorded for this substitution.
| Specification | 1R4 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Half Wave | Voltage Radio Detector Converter |
| Construction | Rectifier | Diode |
| Base | 4AH | Not recorded |
| Socket | Not recorded | Not recorded |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.15 A | 0.15 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 1R4 specifications →