Tube cross-reference
EH90 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EH90 heptode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of EH90
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.
6CS6 Heptode
- Base
- 7CH
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Replacement tubes for EH90
The following tubes are recorded as possible replacements for EH90. This direction does not establish that EH90 can replace them.
Heptode
The database records 6CS6 as a possible replacement forEH90.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Heptode | Heptode |
| Construction | Heptode | Heptode |
| Base | Not recorded | 7CH |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Where EH90 can be used as the replacement
In these recorded relationships, EH90 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EH90.
Heptode
The database records EH90 as a possible replacement for6BY6.
No special restrictions are recorded for this substitution.
| Specification | EH90 replacement | Original tube |
|---|---|---|
| Tube type | Heptode | Heptode |
| Construction | Heptode | Heptode |
| Base | Not recorded | 7CH |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Heptode
The database records EH90 as a possible replacement for6CS6.
No special restrictions are recorded for this substitution.
| Specification | EH90 replacement | Original tube |
|---|---|---|
| Tube type | Heptode | Heptode |
| Construction | Heptode | Heptode |
| Base | Not recorded | 7CH |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 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 EH90 specifications →