Tube cross-reference
1L4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1L4 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 1L4
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.
DF92 Voltage Pentode - Sharp Cutoff (single)
- Base
- Not recorded
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 1.4 V
- Heater current
- 0.05 A
Replacement tubes for 1L4
The following tubes are recorded as possible replacements for 1L4. This direction does not establish that 1L4 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records DF92 as a possible replacement for1L4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 6AR | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.05 A | 0.05 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 1AE4 as a possible replacement for1L4.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 6AR | 6AR |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.25 V |
| Heater current | 0.05 A | 0.1 A |
Where 1L4 can be used as the replacement
In these recorded relationships, 1L4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1L4.
Voltage Pentode - Sharp Cutoff (single)
The database records 1L4 as a possible replacement forDF92.
No special restrictions are recorded for this substitution.
| Specification | 1L4 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 6AR | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.05 A | 0.05 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 1L4 specifications →