Tube cross-reference
6CK3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6CK3 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6CK3
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.
6CL3 Rectifier - Damper Diode
- Base
- 9HP
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 1.2 A
Replacement tubes for 6CK3
The following tubes are recorded as possible replacements for 6CK3. This direction does not establish that 6CK3 can replace them.
Rectifier - Damper Diode
The database records 6CH3 as a possible replacement for6CK3.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | Not recorded |
| Socket | B9A | Not recorded |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.8 A |
Rectifier - Damper Diode
The database records 6CJ3 as a possible replacement for6CK3.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.8 A |
Rectifier - Damper Diode
The database records 6CL3 as a possible replacement for6CK3.
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 | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 A |
Rectifier - Damper Diode
The database records 6DW4B as a possible replacement for6CK3.
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 | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 A |
Where 6CK3 can be used as the replacement
In these recorded relationships, 6CK3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6CK3.
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6AY3.
No special restrictions are recorded for this substitution.
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | Not recorded |
| Socket | B9A | B9E |
| Base pins | 9 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 0.75 A |
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6AY3A.
No special restrictions are recorded for this substitution.
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | Not recorded |
| Socket | B9A | B9E |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 A |
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6AY3B.
No special restrictions are recorded for this substitution.
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | B9A | Not recorded |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 A |
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6BA3.
No special restrictions are recorded for this substitution.
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | B9A | Not recorded |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 A |
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6BH3.
- Parallel heater circuits only
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | Not recorded |
| Socket | B9A | B9E |
| Base pins | 9 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 0.6 A |
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6BH3A.
- Parallel heater circuits only
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | B9A | Not recorded |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.6 A |
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6BS3A.
No special restrictions are recorded for this substitution.
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 A |
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6CL3.
No special restrictions are recorded for this substitution.
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 A |
Rectifier - Damper Diode
The database records 6CK3 as a possible replacement for6DW4B.
No special restrictions are recorded for this substitution.
| Specification | 6CK3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | 9HP | 9HP |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.2 A | 1.2 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 6CK3 specifications →