Tube cross-reference
2T4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 2T4 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 2T4
The following tubes are recorded as possible replacements for 2T4. This direction does not establish that 2T4 can replace them.
Voltage - Triode (single high frequency)
The database records 2AF4 as a possible replacement for2T4.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7DK | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.35 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2AF4A as a possible replacement for2T4.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7DK | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.35 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2AF4B as a possible replacement for2T4.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7DK | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.35 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2DZ4 as a possible replacement for2T4.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7DK | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.35 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Where 2T4 can be used as the replacement
In these recorded relationships, 2T4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 2T4.
Voltage - Triode (single high frequency)
The database records 2T4 as a possible replacement for2AF4.
- Not suitable for all circuits
| Specification | 2T4 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7DK | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.35 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2T4 as a possible replacement for2AF4A.
- Not suitable for all circuits
| Specification | 2T4 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7DK | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.35 V | 2.35 V |
| Heater current | 0.6 A | 0.6 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 2T4 specifications →