Tube cross-reference
5755 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 5755 voltage - dual triode (similar). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 5755
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.
420A Voltage - Dual Triode (similar)
- Base
- Not recorded
- Socket
- UX4
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.36 A
Replacement tubes for 5755
The following tubes are recorded as possible replacements for 5755. This direction does not establish that 5755 can replace them.
Voltage - Dual Triode (similar)
The database records 420A as a possible replacement for5755.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | UX4 |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.36 A | 0.36 A |
Where 5755 can be used as the replacement
In these recorded relationships, 5755 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 5755.
Voltage - Dual Triode (similar)
The database records 5755 as a possible replacement for420A.
No special restrictions are recorded for this substitution.
| Specification | 5755 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar) | Voltage - Dual Triode (similar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | UX4 |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.36 A | 0.36 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 5755 specifications →