Tube cross-reference
7AJ7 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 7AJ7 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 7AJ7
The following tubes are recorded as possible replacements for 7AJ7. This direction does not establish that 7AJ7 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 7C7 as a possible replacement for7AJ7.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 8V | 8V |
| Socket | B8G | B8G |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.15 A |
Where 7AJ7 can be used as the replacement
In these recorded relationships, 7AJ7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 7AJ7.
Voltage Pentode - Sharp Cutoff (single)
The database records 7AJ7 as a possible replacement for7C7.
- Parallel heater circuits only
| Specification | 7AJ7 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 8V | 8V |
| Socket | B8G | B8G |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.15 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 7AJ7 specifications →