Tube cross-reference
6DS4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6DS4 nuvistor tubes (all numbers). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6DS4
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.
6CW4 Nuvistor Tubes (all numbers)
- Base
- 12AQ
- Socket
- NUVISTOR5
- Base pins
- 5
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.135 A
Replacement tubes for 6DS4
The following tubes are recorded as possible replacements for 6DS4. This direction does not establish that 6DS4 can replace them.
Nuvistor Tubes (all numbers)
The database records 7895 as a possible replacement for6DS4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Nuvistor Tubes (all numbers) | Nuvistor Tubes (all numbers) |
| Construction | Triode | Triode |
| Base | 12AQ | TWELVAR 5 pin |
| Socket | Not recorded | Not recorded |
| Base pins | 4 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.135 A | 0.135 A |
Nuvistor Tubes (all numbers)
The database records 6CW4 as a possible replacement for6DS4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Nuvistor Tubes (all numbers) | Nuvistor Tubes (all numbers) |
| Construction | Triode | Triode |
| Base | 12AQ | 12AQ |
| Socket | Not recorded | NUVISTOR5 |
| Base pins | 4 | 5 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.135 A | 0.135 A |
Where 6DS4 can be used as the replacement
In these recorded relationships, 6DS4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6DS4.
Nuvistor Tubes (all numbers)
The database records 6DS4 as a possible replacement for6CW4.
No special restrictions are recorded for this substitution.
| Specification | 6DS4 replacement | Original tube |
|---|---|---|
| Tube type | Nuvistor Tubes (all numbers) | Nuvistor Tubes (all numbers) |
| Construction | Triode | Triode |
| Base | 12AQ | 12AQ |
| Socket | Not recorded | NUVISTOR5 |
| Base pins | 4 | 5 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.135 A | 0.135 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 6DS4 specifications →