Tube cross-reference
6DN3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6DN3 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6DN3
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.
6CM3 Rectifier - Damper Diode
- Base
- 9HP
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 2.4 A
Replacement tubes for 6DN3
The following tubes are recorded as possible replacements for 6DN3. This direction does not establish that 6DN3 can replace them.
Rectifier - Damper Diode
The database records 6CM3 as a possible replacement for6DN3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | IO | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 2.4 A | 2.4 A |
Where 6DN3 can be used as the replacement
In these recorded relationships, 6DN3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6DN3.
Rectifier - Damper Diode
The database records 6DN3 as a possible replacement for6CM3.
No special restrictions are recorded for this substitution.
| Specification | 6DN3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | IO | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 2.4 A | 2.4 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 6DN3 specifications →