Tube cross-reference
19AU4 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 19AU4 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 19AU4
The following tubes are recorded as possible replacements for 19AU4. This direction does not establish that 19AU4 can replace them.
Rectifier - Damper Diode
The database records 17CQ4 as a possible replacement for19AU4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Not recorded |
| Socket | IO | B7G |
| Base pins | 6 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 18.9 V | 17 V |
| Heater current | 0.6 A | 0.6 A |
Rectifier - Damper Diode
The database records 17DE4 as a possible replacement for19AU4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 4CG |
| Socket | IO | IO |
| Base pins | 6 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 18.9 V | 17 V |
| Heater current | 0.6 A | 0.6 A |
Rectifier - Damper Diode
The database records 19AU4GTA as a possible replacement for19AU4.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 43CG |
| Socket | IO | IO |
| Base pins | 6 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 18.9 V | 18.9 V |
| Heater current | 0.6 A | 0.6 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 19AU4 specifications →