Tube cross-reference
CK512AX alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the CK512AX voltage pentode or tetrode (under 100v). Compare core specifications and verify every restriction before using a replacement.
Where CK512AX can be used as the replacement
In these recorded relationships, CK512AX is the replacement tube. The listed original tubes are not automatically suitable as replacements for CK512AX.
Voltage Pentode or Tetrode (under 100V)
The database records CK512AX as a possible replacement for6281.
No special restrictions are recorded for this substitution.
| Specification | CK512AX replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Pentode or Tetrode (under 100V) |
| Construction | Pentode | Pentode |
| Base | 5J | Not recorded |
| Socket | Not recorded | SUBMINIATURE8 |
| Base pins | 5 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 0.625 V | 0.625 V |
| Heater current | 0.02 A | 0.02 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 CK512AX specifications →