Tube cross-reference
3CU3A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 3CU3A rectifier - tv line scan boost. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 3CU3A
The following tubes are recorded as possible replacements for 3CU3A. This direction does not establish that 3CU3A can replace them.
Rectifier - TV Line Scan Boost
The database records 3A3C as a possible replacement for3CU3A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - TV Line Scan Boost | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | 8MK | Not recorded |
| Socket | IO | IO |
| Base pins | 6 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 3.15 V | 3.15 V |
| Heater current | 0.28 A | 0.22 A |
Where 3CU3A can be used as the replacement
In these recorded relationships, 3CU3A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 3CU3A.
Rectifier - TV Line Scan Boost
The database records 3CU3A as a possible replacement for3A3.
No special restrictions are recorded for this substitution.
| Specification | 3CU3A replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - TV Line Scan Boost | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | 8MK | 8EZ |
| Socket | IO | Not recorded |
| Base pins | 6 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 3.15 V | 3.15 V |
| Heater current | 0.28 A | 0.22 A |
Rectifier - TV Line Scan Boost
The database records 3CU3A as a possible replacement for3A3A.
No special restrictions are recorded for this substitution.
| Specification | 3CU3A replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - TV Line Scan Boost | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | 8MK | Not recorded |
| Socket | IO | OCTAL6 |
| Base pins | 6 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 3.15 V | 3.15 V |
| Heater current | 0.28 A | 0.22 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 3CU3A specifications →