Tube cross-reference
8CX8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 8CX8 power - pentode (not beam). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 8CX8
The following tubes are recorded as possible replacements for 8CX8. This direction does not establish that 8CX8 can replace them.
Power - Pentode (NOT beam)
The database records 8EB8 as a possible replacement for8CX8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | NOVAL |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 8 V | 8 V |
| Heater current | 0.6 A | 0.45 A |
Power - Pentode (NOT beam)
The database records 8GN8 as a possible replacement for8CX8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | NOVAL |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 8 V | 8 V |
| Heater current | 0.6 A | 0.45 A |
Power - Pentode (NOT beam)
The database records 8JE8 as a possible replacement for8CX8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 8 V | 8.2 V |
| Heater current | 0.6 A | 0.6 A |
Where 8CX8 can be used as the replacement
In these recorded relationships, 8CX8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 8CX8.
Power - Pentode (NOT beam)
The database records 8CX8 as a possible replacement for8EB8.
No special restrictions are recorded for this substitution.
| Specification | 8CX8 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | NOVAL |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 8 V | 8 V |
| Heater current | 0.6 A | 0.45 A |
Power - Pentode (NOT beam)
The database records 8CX8 as a possible replacement for8GN8.
No special restrictions are recorded for this substitution.
| Specification | 8CX8 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | NOVAL |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 8 V | 8 V |
| Heater current | 0.6 A | 0.45 A |
Power - Pentode (NOT beam)
The database records 8CX8 as a possible replacement for8JE8.
No special restrictions are recorded for this substitution.
| Specification | 8CX8 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 8 V | 8.2 V |
| Heater current | 0.6 A | 0.6 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 8CX8 specifications →