Tube cross-reference
6L43 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6L43 power - pentode single (not beam) (under 10w). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6L43
The following tubes are recorded as possible replacements for 6L43. This direction does not establish that 6L43 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 6CL6 as a possible replacement for6L43.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | S9/12 | 9BV |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 A |
Where 6L43 can be used as the replacement
In these recorded relationships, 6L43 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6L43.
Voltage Pentode - Sharp Cutoff (single)
The database records 6L43 as a possible replacement for6CL6.
No special restrictions are recorded for this substitution.
| Specification | 6L43 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | S9/12 | 9BV |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 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 6L43 specifications →