Tube cross-reference
3DY4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 3DY4 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 3DY4
The following tubes are recorded as possible replacements for 3DY4. This direction does not establish that 3DY4 can replace them.
Voltage - Triode (single high frequency)
The database records 3DY4A as a possible replacement for3DY4.
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 | 7DK | 7DK |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.9 V | 2.9 V |
| Heater current | 0.3 A | 0.3 A |
Where 3DY4 can be used as the replacement
In these recorded relationships, 3DY4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 3DY4.
Voltage - Triode (single high frequency)
The database records 3DY4 as a possible replacement for3DY4A.
No special restrictions are recorded for this substitution.
| Specification | 3DY4 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7DK | 7DK |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.9 V | 2.9 V |
| Heater current | 0.3 A | 0.3 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 3DY4 specifications →