Tube cross-reference
5590 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 5590 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 5590
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.
401A Voltage Pentode - Sharp Cutoff (single)
- Base
- E7-1
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.15 A
Replacement tubes for 5590
The following tubes are recorded as possible replacements for 5590. This direction does not establish that 5590 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 401A as a possible replacement for5590.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | E7-1 | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Where 5590 can be used as the replacement
In these recorded relationships, 5590 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 5590.
Voltage Pentode - Sharp Cutoff (single)
The database records 5590 as a possible replacement for401A.
No special restrictions are recorded for this substitution.
| Specification | 5590 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | E7-1 | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 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 5590 specifications →