Tube cross-reference
6ED4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6ED4 specialized - cathode ray. Compare core specifications and verify every restriction before using a replacement.
Where 6ED4 can be used as the replacement
In these recorded relationships, 6ED4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6ED4.
Triode - HV Shunt Regulator
The database records 6ED4 as a possible replacement forED500.
No special restrictions are recorded for this substitution.
| Specification | 6ED4 replacement | Original tube |
|---|---|---|
| Tube type | Specialized - Cathode Ray | Triode - HV Shunt Regulator |
| Construction | CathodeRay | Triode |
| Base | Not recorded | Not recorded |
| Socket | B12A | B9D |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 6.3 V |
| Heater current | 1 A | 0.35 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 6ED4 specifications →