Tube cross-reference
2AF4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 2AF4 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 2AF4
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.
2DZ4 Voltage - Triode (single high frequency)
- Base
- Not recorded
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 2.35 V
- Heater current
- 0.6 A
Replacement tubes for 2AF4
The following tubes are recorded as possible replacements for 2AF4. This direction does not establish that 2AF4 can replace them.
Voltage - Triode (single high frequency)
The database records 2AF4A as a possible replacement for2AF4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | E7-1 | 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 for2AF4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | E7-1 | 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 for2AF4.
- 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 | E7-1 | 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 2T4 as a possible replacement for2AF4.
- 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 | E7-1 | 7DK |
| 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 2AF4 can be used as the replacement
In these recorded relationships, 2AF4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 2AF4.
Voltage - Triode (single high frequency)
The database records 2AF4 as a possible replacement for2T4.
- Not suitable for all circuits
| Specification | 2AF4 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | E7-1 | 7DK |
| 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 2AF4 specifications →