Tube cross-reference
EAF42 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EAF42 voltage pentode or tetrode (under 100v). Compare core specifications and verify every restriction before using a replacement.
Exact variations of EAF42
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.
6CT7 Voltage Radio Detector Converter
- Base
- OCTAL
- Socket
- IO
- Base pins
- 8
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Replacement tubes for EAF42
The following tubes are recorded as possible replacements for EAF42. This direction does not establish that EAF42 can replace them.
Voltage Radio Detector Converter
The database records 6CT7 as a possible replacement forEAF42.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Radio Detector Converter |
| Construction | Diode-Pentode | Diode-Pentode |
| Base | NOVAL | OCTAL |
| Socket | B9A | IO |
| Base pins | 9 | 8 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.3 A |
Where EAF42 can be used as the replacement
In these recorded relationships, EAF42 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EAF42.
Voltage Radio Detector Converter
The database records EAF42 as a possible replacement for6CT7.
No special restrictions are recorded for this substitution.
| Specification | EAF42 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Radio Detector Converter |
| Construction | Diode-Pentode | Diode-Pentode |
| Base | NOVAL | OCTAL |
| Socket | B9A | IO |
| Base pins | 9 | 8 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 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 EAF42 specifications →