Tube cross-reference
6AB4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6AB4 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6AB4
The following tubes are recorded as possible replacements for 6AB4. This direction does not establish that 6AB4 can replace them.
Voltage - Triode (single)
The database records EC92 as a possible replacement for6AB4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | E7-1 | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Voltage - Triode (single)
The database records 6664 as a possible replacement for6AB4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | E7-1 | 7BD |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Where 6AB4 can be used as the replacement
In these recorded relationships, 6AB4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6AB4.
Voltage - Triode (single)
The database records 6AB4 as a possible replacement forEC92.
No special restrictions are recorded for this substitution.
| Specification | 6AB4 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | E7-1 | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Voltage - Triode (single)
The database records 6AB4 as a possible replacement for6664.
No special restrictions are recorded for this substitution.
| Specification | 6AB4 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | E7-1 | 7BD |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 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 6AB4 specifications →