Tube cross-reference
6L4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6L4 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Where 6L4 can be used as the replacement
In these recorded relationships, 6L4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6L4.
Voltage - Triode (single high frequency)
The database records 6L4 as a possible replacement for6F4.
No special restrictions are recorded for this substitution.
| Specification | 6L4 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7BR | 7BR |
| Socket | B7G | Not recorded |
| Base pins | 7 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.225 A | 0.225 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 6L4 specifications →