Tube cross-reference
4GX7 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 4GX7 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 4GX7
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.
Replacement tubes for 4GX7
The following tubes are recorded as possible replacements for 4GX7. This direction does not establish that 4GX7 can replace them.
Voltage Radio Detector Converter
The database records 4GJ7 as a possible replacement for4GX7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | Not recorded | 9QA |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 4.2 V | 4.3 V |
| Heater current | 0.6 A | 0.6 A |
Where 4GX7 can be used as the replacement
In these recorded relationships, 4GX7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 4GX7.
Voltage Radio Detector Converter
The database records 4GX7 as a possible replacement for4GJ7.
No special restrictions are recorded for this substitution.
| Specification | 4GX7 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | Not recorded | 9QA |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 4.2 V | 4.3 V |
| Heater current | 0.6 A | 0.6 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 4GX7 specifications →