Tube cross-reference
6AK7 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6AK7 power - pentode (not beam). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6AK7
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.
6AG7 Power - Pentode Single (NOT beam) (under 10W)
- Base
- B8-21
- Socket
- IO
- Base pins
- 8
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.65 A
Replacement tubes for 6AK7
The following tubes are recorded as possible replacements for 6AK7. This direction does not establish that 6AK7 can replace them.
Power - Pentode Single (NOT beam) (under 10W)
The database records 6L10 as a possible replacement for6AK7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | 8Y | K8/18 |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 A |
Power - Pentode Single (NOT beam) (under 10W)
The database records 6AG7 as a possible replacement for6AK7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | 8Y | B8-21 |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 A |
Power - Pentode (NOT beam)
The database records 6AG7Y as a possible replacement for6AK7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode | Pentode |
| Base | 8Y | Not recorded |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 A |
Where 6AK7 can be used as the replacement
In these recorded relationships, 6AK7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6AK7.
Power - Pentode Single (NOT beam) (under 10W)
The database records 6AK7 as a possible replacement for6AG7.
No special restrictions are recorded for this substitution.
| Specification | 6AK7 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | 8Y | B8-21 |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 A |
Power - Pentode (NOT beam)
The database records 6AK7 as a possible replacement for6AG7Y.
No special restrictions are recorded for this substitution.
| Specification | 6AK7 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode | Pentode |
| Base | 8Y | Not recorded |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 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 6AK7 specifications →