Tube cross-reference
19CUP4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 19CUP4 specialized - cathode ray. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 19CUP4
The following tubes are recorded as possible replacements for 19CUP4. This direction does not establish that 19CUP4 can replace them.
Specialized - Cathode Ray
The database records 19DFP4 as a possible replacement for19CUP4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Specialized - Cathode Ray | Specialized - Cathode Ray |
| Construction | CathodeRay | CathodeRay |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | Not recorded |
| Base pins | 0 | 0 |
| Sections | 1 | 1 |
| Heater voltage | Not recorded | Not recorded |
| Heater current | Not recorded | Not recorded |
Where 19CUP4 can be used as the replacement
In these recorded relationships, 19CUP4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 19CUP4.
Specialized - Cathode Ray
The database records 19CUP4 as a possible replacement for19DFP4.
No special restrictions are recorded for this substitution.
| Specification | 19CUP4 replacement | Original tube |
|---|---|---|
| Tube type | Specialized - Cathode Ray | Specialized - Cathode Ray |
| Construction | CathodeRay | CathodeRay |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | Not recorded |
| Base pins | 0 | 0 |
| Sections | 1 | 1 |
| Heater voltage | Not recorded | Not recorded |
| Heater current | Not recorded | Not recorded |
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 19CUP4 specifications →