Tube cross-reference
ECH42 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the ECH42 voltage - triode (with diode, heptode or hexode). Compare core specifications and verify every restriction before using a replacement.
Exact variations of ECH42
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.
6CU7 Voltage - Triode (with diode, heptode or hexode)
- Base
- OCTAL
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.23 A
Replacement tubes for ECH42
The following tubes are recorded as possible replacements for ECH42. This direction does not establish that ECH42 can replace them.
Voltage - Triode (with diode, heptode or hexode)
The database records 6CU7 as a possible replacement forECH42.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (with diode, heptode or hexode) | Voltage - Triode (with diode, heptode or hexode) |
| Construction | Hexode-Triode | Hexode-Triode |
| Base | Not recorded | OCTAL |
| Socket | B8A | B9A |
| Base pins | 8 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.23 A | 0.23 A |
Where ECH42 can be used as the replacement
In these recorded relationships, ECH42 is the replacement tube. The listed original tubes are not automatically suitable as replacements for ECH42.
Voltage - Triode (with diode, heptode or hexode)
The database records ECH42 as a possible replacement for6CU7.
No special restrictions are recorded for this substitution.
| Specification | ECH42 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (with diode, heptode or hexode) | Voltage - Triode (with diode, heptode or hexode) |
| Construction | Hexode-Triode | Hexode-Triode |
| Base | Not recorded | OCTAL |
| Socket | B8A | B9A |
| Base pins | 8 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.23 A | 0.23 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 ECH42 specifications →