Tube cross-reference
6CK6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6CK6 power - pentode single (not beam) (under 10w). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6CK6
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.
EL83 Power - Pentode Single (NOT beam) (under 10W)
- Base
- Not recorded
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.71 A
Replacement tubes for 6CK6
The following tubes are recorded as possible replacements for 6CK6. This direction does not establish that 6CK6 can replace them.
Power - Pentode Single (NOT beam) (under 10W)
The database records EL803 as a possible replacement for6CK6.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | 9AR | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.71 A | 0.65 A |
Power - Pentode Single (NOT beam) (under 10W)
The database records EL83 as a possible replacement for6CK6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | 9AR | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.71 A | 0.71 A |
Where 6CK6 can be used as the replacement
In these recorded relationships, 6CK6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6CK6.
Power - Pentode Single (NOT beam) (under 10W)
The database records 6CK6 as a possible replacement forEL803.
- Not suitable for all circuits
| Specification | 6CK6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | 9AR | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.71 A | 0.65 A |
Power - Pentode Single (NOT beam) (under 10W)
The database records 6CK6 as a possible replacement forEL83.
No special restrictions are recorded for this substitution.
| Specification | 6CK6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | 9AR | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.71 A | 0.71 A |
Power - Pentode Single (NOT beam) (under 10W)
The database records 6CK6 as a possible replacement for6M5.
- Not suitable for all circuits
| Specification | 6CK6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | 9AR | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.71 A | 0.7 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 6CK6 specifications →